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The best products for mechanical feedback are membrane switches and silicon/rubber keypads. Touchscreens can be (user) programmed to give an acoustic signal when operated.
For PCAP touchscreens is controller tuning required for the best EMC performance. Our electric engineers will tune the product and assist you for your specific application.
Our solutions – features – EMC
We can print with limitations in full color. Also is for certain applications digital printing available. Please
for more details.
SCHURTER Input Systems uses standard available touchscreens from partner suppliers from Asia. Custom made products are designed and sample produced in the Dutch facility. Custom volume products are outsourced to a dedicated partner in Asia.
All resistive touchscreens work with water and moisture. PCAP touchscreens can be programmed to have water rejection capabilities. Please notice that with PCAP touchscreens the functionality will be temporary switched off, when a large amount of water is detected.
our solutions – features – IP&IK value
SCHURTER Input Systems does not produce glass in house. We do have although equipment available to print, cut and seem the glass to your requirements.
competences & quality - competences
Yes. Our touchscreens can be prepared for you to use with gloves.
Our solutions – technologies – touchscreen solutions
Yes, partial illumination is possible in 1 or multiple colors for different operating modes
Our solutions – features – illumination technology
All touchscreens are 3V/m resistance. If 10V/m is required, special controllers and constructions are available to fulfill this need.
Our solutions – features – EMC
We can offer LED back lightning, EL back lightning and some special light guided solutions.
Our solutions – features – illumination technology
For the best cost effective and technical solution, we would like to be early involved in your product design. The best moment is at the start of your new product ideas.
competences & quality - competences
CAD data is available in compressed ZIP files, so that a quicker data transfer is ensured.
"SCHURTER offers for catalog articles 2D models in DXF, as well as 3D CAD models as generic interchange formats in STEP, Parasolid IGES for free downloads.
Available CAD models are available for chosen products in the Dimension chapter together with a 3D preview. CAD models can also be sought and are likewise offered in the product search as additional information. "
SCHURTER offers for catalog articles 2D models in DXF, as well as 3D CAD models as generic interchange formats in STEP, Parasolid IGES for free downloads. These are surface models, which can be used for construction of the outlying area.
Die Suchtreffer werden immer unter Angabe der Anzahl Treffer aufgeführt und der der Möglichkeit diese Auswahl zu löschen mit einem Click auf das anschliessende X bzw. mit Löschen des ergänzten Suchparameters in der URL.
If the SCHURTER Catalog is called from the navigation, the selection list and all available products are displayed immediately below the page navigation in three columns. The number of search hits is displayed on the left and the sorting option on the right under Selection list.
The presentation is described below for desktop navigation. This is followed by a few remarks on the mobile application.
Filter by Product Characteristics
In the product search, individual product parameters such as the protection class are of more interest than the classification of products into product groups. Correspondingly, such disclosures also apply in some cases to all product groups. Filters can be set in all catloge levels, whereby the appropriate filters are suggested in the respective product group.
Filtering according to parameters is done step-by-step. Starting from the first selection, only the possible selection values of the previously determined results are available in the next step. The display of the possible filters is automatically restricted after selection.
The order is irrelevant for filtering and can be reversed in any order.
The selection of filter parameters is displayed alphabetically sorted below the filter symbol of the selection list. The proposed filters are suggested above, depending on the selection area. Below it are listed the additional possible filters, which can be inserted with a click on the + symbol upwards or with a click on the symbol downwards.
Explanations of the respective filters can be found behind the? symbol. A pop-up window may contain a short explanation with a link to detailed information.
A click on the filter parameter opens a separate window with the possible selection values to the right of the filter column. The expected number of search hits is displayed to the right of the respective selection value.
As soon as the filter value is selected, the catalog search is updated, the window is closed and the filter is displayed in blue as a link. Clicking on the parameter displays the selection value.
A click on the X next to the filter parameter resets the selection and allows you to select a different value, for example. Alternatively, the parameter can be deleted from the URL.
To reset all filter parameters or selection groups, select All in the selection list.
In some areas, it makes sense to group individual product parameters, since they are interdependent. Accordingly, only the parameters listed and not the grouping itself can be selected, while the explanation and deselection are individual.
The mobile display is optimized especially for mobile phones. Accordingly, less information is provided in this presentation. The filters were completely omitted. The navigation is hierarchical and is supplemented by the search.
The presentation of groups and products is reduced to a minimum. The complete product information is available in the PDF data shee
If a partial term of the series or an article number is already known, this search term can be entered into the search field within the selection list. The hit list is immediately displayed as a proposal list. If the entry is completed with the Enter key, the search hits are listed as described above. Otherwise, the mouse selection of the respective default value opens the data sheet directly in a new window.
The selection list on the far left contains the symbol for opening the filter. This is followed by the search input for series or variant. In the following, the superordinate product areas are listed and on the right hand side the selection of all products with the term All.
The products are grouped together in the higher-level product groups for easier navigation. The individual product groups are listed below. Details are provided by clicking on a term in the dropdown list within a drop-down menu. Below you will find the most important links to further information.
The selection on the left-hand side selects all product groups that are listed to the right of it. The search results are updated immediately after selection, which closes the drop-down menu, highlights the selected parent group in bold in the drop-down list, updates the number of hits in the selection and adds a corresponding parameter to the URL.
The widgets on the right-hand side of the catalogue also include a possibility to share a selection made, e. g. by e-mail with other people. The corresponding parameterized URL is sent.
The search hits can be sorted by the following categories
1. Most popular: Helps to search for availability
2. Name: Corresponds to the descending alphabetical order.
3. New: The new products are displayed first
4. Phase-Out: Products that have reached the end of their lifecycle
"SCHURTER offers various Approvals
Furthemore the approvals can be found by searching directly via the family (series) or article number "
"SCHURTER makes necessary certificates for various catalog articles available on the website for download. For each product you have the possibility to see these certificates
Alternatively you have the possibility to search through various available certificates in RoHS . Furthermore this information is displayed in the search results for each product as additional information
If you would like to receive this information automatically, you can subscribe to the RSS Feeds ."
Please sent us your request or your correction reference to approval (at) schurter.ch . We will process your request promptly.
The production date is included in the EAN Code of the packaging label. For standard products no further additional information is provided. For customer specific production this information is made available by arrangement.
"The country of origin is shown on the packaging label and displays the place of production. Currently this information is not communicated in the technical data.
If the location is known, the address of the SCHURTER production plant can be discovered."
The product certificates may be searched separately Approval Certificates . The specific certificates per product will bee listed and referenced on the respective data sheet.
Company certificates can be downloaded from the document search: Certificates
In the Catalog all standard products are described in detail with the corresponding product specifications.
In the section Sales Partners you can see SCHURTER's world wide sales partners. You can then find relevant contact information for a partner near you. Alternatively we offer the possibility to check the dealers using the Stock Check Distributor , to discover which have the desired product in stock.
In the downloads Documents / References section you have the possibility to have a look at the information material offered. Those documents with the note "Printed Document" can be ordered by clicking on the checkbox and by clicking on "Order". They will be then sent to the desired address.
The search input field is part of the navigation and is always at the top right.
The Search is described in detail within the search help. The question mark right after the search field also leads to this information.
In the section Sales Partners you can see the world wide sales partners of SCHURTER. You can then find relevant contact information for a partner near you. Alternatively we offer the possibility to check the dealers using the Stock Check Distributor , to discover which have the desired product in stock.
SCHURTER has a workd wide network of sales partners. In the Sales Partners section, you can see SCHURTER's worldwide sales partners.You can then find the relevant contact information of a nearby partner. Alternatively we offer the possibility by means of Stock Check Distributor to check the dealers, which have the desired product in stock.
In Input Systems there are no standard products. A customer specific orientation based on the current technology makes more sense. Correspondingly we recommend that you have a look at the offerered Technologien
and get in contact with our Input Systems specialists for your needs.
For queries regarding prices, please use our contact form. You can receive an offer specifically for your chosen product. Contact-Form
Bruno Ochs is the head of the division Input Systems. Please find per facility the responsible Managing Director.
SCHURTER Input Systems is part of a large, financial strong, international holding based in Switzerland. SCHURTER Input Systems is based in West Europe with a long time experience in the latest industrial switching technologies. SCHURTER Input Systems is your partner to develop your ideas to a competitive product for your specific market.
IEC connectors
Appliance couplers approved according IEC 60320 are designed as two pole appliance couplers for alternate current with or without protective conductor with a rated voltage of 250 V and a rated current of 16A for technical application that are desired for interconnection to flexible cords of electrical equipment for power supply of 50Hz or 60Hz.
Appliance couplers according mentioned standard are suitable for operation under environmental temperatures of normally 25° C and do not have to exceed 35° C.
Appliance couplers are designed for use without especial moisture protection. So the design of the appliance needs to assure ingress protection if it is designed to be used under these circumstances.
Following figures need to be respected in order to meet standard IEC 60320:
-␉Rated voltage: 250 VAC
-␉Rated current according type: 0.2A, 2.5A, 6A, 10A, 16A
The appliance couplers are separated according the maximum operation temperature at the base of the connector pin:
-␉Pin temperature up to 70°C: Appliance couplers for cold condition
-␉Pin temperature up to 120°C: Appliance couplers for warm condition
-␉Pin temperature up to 155°C: Appliance couplers for hot condition
Their outlines are coded in a way, that appliance couplers for hot conditions may also be used under cold conditions, and appliance couplers for very hot conditions may also be used under cold or hot conditions.
The appliance couplers are separated according the categories of equipment:
-␉Appliance couplers for appliances according protection class I
-␉Appliance couplers for appliances according protection class II
-␉The protection classes are described in standard IEC 61140
Appliance couplers will be additionally separated according the connection method to a flexible cord:
-␉Rewireable connectors
-␉Non-rewireable connectors
IEC appliance couplers
Appliance couplers, interconnection couplers and power plugs are developed and manufactured in accordance with national and international standards. These standards are issued in order to create a general consensus on the basic dimensions and safety goals of the appliance couplers. Following this approach, safety has been achieved, in the overwhelming majority of cases, when combining components. While the design of power plug systems is governed by the relevant national standards, appliance couplers follow the IEC 60320 standard, including its subsections.
The power supply of various electrical appliances follows country-specific requirements in terms of voltage and current. It is therefore practical for international appliance manufacturers to use IEC appliance couplers and interconnection couplers for their respective appliances’ power supply. SCHURTER, i.e. its strategic division, provides a wide range of products for such purposes. In order to ensure full compliance with the given standards, SCHURTER products are tested by independent testing organizations (See ).
Application area
Two-pole AC-only appliance couplers, with or without earthing contact, rated for voltages up to 250VAC and nominal currents of up to 16A, used for connecting a flexible power supply cord to electrical appliances or other electrical installations at 50 or 60Hz (cf. ).
Two-pole AC-only interconnection couplers, with or without earthing contact, rated for voltages up to 250VAC and nominal currents of up to 16A, used for interconnecting the power supply and appliances or installations at 50Hz or 60Hz (cf. ).
Requirements / categories
Pin temperature
The requirements placed on connectors are contingent on the maximum temperature of the corresponding appliance inlets, i.e.:
| Plug Temperature | corresponds to | Comment |
| 70°C | Appliance couplers for cold conditions | (colloquially referred to as a ‘cold condition’ appliance couplers) |
| 120°C | Appliance couplers for hot conditions | (colloquially referred to as a ‘worm condition’ appliance couplers acc. translation of a German terminology) |
| 155°C | Appliance couplers for very hot conditions | (colloquially referred to as a ‘hot condition’ appliance couplers) |
‘Cold condition’ appliance inlets may not be used in appliances with exterior parts whose temperature increase can exceed 75K and which, when used properly, can come into contact with the movable power cord.
Nominal currents
According to IEC 60320, the following nominal currents apply: 2.5A / 6A / 10A /16A. The nominal current ratings of SCHURTER’s components are based on the relevant approval standards which may differ from one country to another (see ). The table below shows the differences between the IEC’s nominal current ratings and those approved by VDE, UL and CSA (SCHURTER reference components).
IEC 60320, to prevent improper use, provides for contour coding for the nominal currents listed above.
| IEC | VDE | UL | CSA |
| 2.5 A | 2.5 A max. | 2.5 A | 6 A max. |
| 6 A | 6 A max. | n/a | n/a |
| 10 A | 10 A max. | 15 A max. | 16 A max. |
| 16 A | 16 A max. | 20 A max. | 21 A max. |
Circuit breakers for equipment
In addition to switching, a Circuit Breaker for Equipment (CBE) ensures protection against overload. You will find detailed information on CBE as well as a product overview of Power Entry Modules with CBE in the product overview under Circuit Breakers for Equipment.
Special designs
Appliance couplers in compliance with the present standards are designed to connect appliances without special protection against humidity (see ). Appliances whose operation, when used properly, may involve overflowing liquids or dust emissions must themselves be protected against humidity. IEC standard 60320-2-3 provides that the power supply’s IP protection rating must be at least identical to that of the appliance.
Special designs may also become necessary in environments involving special conditions (e.g. on ships or in motor vehicles) and in dangerous locations (e.g. involving explosives).
CE marking acc. to EU-directive
CE marking is the only marking which indicates that a product conforms to the relevant EU-directive.
This means that the CE-mark is no quality or standard conformity mark but only an administration mark.
SCHURTER products are covered by the low voltage directives 2006/95/EEC. Those are valid for equipment and appliances with rated voltage values between AC 50 V to AC 1000 V as well as DC 75 V to DC 1500 V.
The CE marking of SCHURTER parts will be found on the label of the smallest packing unit. On request we will submitt a CE conformity statement for each component.
Integration as system solution
According to customer requirements, SCHURTER also offers complete function units. The switches or keypads are individually installed in the specific front panel. SCHURTER additionally offers completely assembled system solutions for integration of further components and electronic modules. An example is the desktop version for metallic panel keypads: the input system is installed in a desktop housing with integral trackball for mouse control.
Heating
For applications in cold climatic environments, the metallic panel keypads can be additionally provided with a heating overlay. For this reason, the keypad is still pleasant to use even at frosty temperatures and the freezing of the switches is prevented.
EMC requirements in Europe
EMC requirements in Europe
| Household, Luminaries and Telecommunication Residential, commercial and light industrial | Class Industrial (ISM) Industrial, Scientific and Medical |
| Emission – IEC 61000-6-3 (EN 50081-1) | Emission – IEC 61000-6-4(EN 50081-2) |
| – EN 55011 – Harmonics (IEC 61000-3-2) – Voltage fluctuation (IEC 61000-3-3) | |
Electrical safety regulations
The most important safety standards for equipment/installations are listed in the following:
IEC 60950␉Safety of information technology equipment including electrical business equipmentIEC 60950
IEC 60335␉Safety of household and similar electrical appliancesIEC 60335
IEC 61010-1␉Safety requirements for electronic measuring appartusIEC 61010-1
IEC 60601␉Safety requirements for electro-medical equipmentIEC 60601
UL60950␉Safety requirements for information technology equipmentUL60950
UL60601-1␉Electric medical and dental equipmentUL60601-1
Interference emissions
There are basically 2 types of emitted disturbances: conducted and radiated. Line interferences are high frequency noise signals which are superimposed on the useful signals on input and output lines. Interference signals can be of common- or differential mode type. The significance of line interference is reduced dramatically above a frequency of 30 MHz. From here radiated interference increases greatly. On the following pages we will nevertheless deal with conducted interference only.
Measuring technique CISPR 3
Radio frequency interference boundary values
RFI testing station
EN 55011: Boundary values and measuring systems for RF suppression for industrial, scientific and medical high frequency equipment (ISM), 1991 (see also CISPR 11 or VDE 0871)
Boundary values complying with EN 55011
Quasipeak (QP) and Average (AV) are two limits, neither of which must be exceeded and which are measured by two different test receivers. The test arrangement remains the same. These boundary values replace the boundary values given by the old standards for broadband and narrowband noise generators.
Boundary values are divided into class A and B.
Into class A fall those devices which should not be operated in residential buildings and should not be connected to power supplies which also supply these areas. Class A boundary values shall not be exceeded.
Into class B fall devices for which above restrictions do not apply. Class B boundary values shall not be exceeded.
EN 55022: Boundary values and measuring systems for RF suppression for information technology installations (Telecommunications) 1987 (see also CISPR 22 or VDE 0878).
Boundary values complying with EN 55022
Into class A fall all units which should be used in a commercial environment and should be used with a safety distance of 30 m to other units.
Into class B fall all units which have no restrictions on their use.
EN 55013: Boundary value and measuring techniques for RF suppression characteristics of radio receivers and connected applications.
EN 55014: Boundary values and measuring systems for RF suppression for electrical household appliances, handheld electrical tools and similar electrical products, 1993 (see also CISPR 14).
EN 55015: Boundary values and measuring systems for RF suppression for fluorescent lamps and lighting, 1993 (see also CISPR 13).
Harmonics
(EN 61000-3-2, IEC 61000-3-2)
Current harmonics represent a distortion of the normal sine wave provided by the utility. When a product such as an SCR switched load or a switching power supply distorts the current, harmonics at multiples of the power line frequency are generated. Two significant consequences arise as a result of harmonic generation. First, because of finite impedances of power lines, voltage variations are generated that other equipment on the line must tolerate. Second, when generated in a three-phase system, harmonics may cause overheating of neutral lines.
Power line harmonics are generated when a load draws a non linear current from a sinusoidal voltage. The harmonic component is an element of a Fourier series which can be used to define any periodic waveshape. The harmonic order or number is the integral number defined by the ratio of the frequency of the harmonic to the fundamental frequency (e.g., 150 Hz is the third harmonic of 50 Hz; n = 150/50).
After multiple postponement finishes at 1.1. 2001 the transition-period for the EN 61000-3-2, frequently called “PFC-Norm”. It applies to all electrical and electronic devices with input current up to max. 16 A per phase, which are designed to connect to the general lowvoltage mains. Limits are set only for 220/380 V, 230/400 V and 240/415 V at 50 Hz.
This standard distinguishes four classes of equipment.
A Simmetric three phase equipment and all other equipment not in other classes
B Portable tools
C Lighting equipment
D Equipment having special waveshape (see EN 61000-3-2, paragraph 4 picture 1)
A harmonics test to conform to the standards must include an analysis of the incoming current up to the 40th harmonic (for fN = 50 Hz, fH = 2 kHz).
The IEC 61642 "Industrial a.c. networks affected by harmonics- application of filters and shunt capacitors" give guidance for the use of passive a.c. harmonic filters and shunt capacitors for the limitation of harmonics and power factor correction intended to be used in industrial applications, at low and high voltages.
Voltage fluctuations (Flicker)
(EN61000-3-3, IEC 61000-3-3, IEC 61000-3-5)
The appearance of flicker effects and voltage fluctuations on the mains supply is caused by varying loads connected to the mains. The most critical are the effects of voltage fluctuations on equipment such as lights and illumination. Here the light output and thereby the intensity is an exponential function of the supplied voltage. This fluctuation in light intensity is called flicker. Many people experience dizziness and headaches as a result.
There are various limit values depending on the type of voltage fluctuation (square, sinusoidal and mixed or erratic voltage fluctuation).
Flickers are measured by so-called flicker meters (arranged in compliance with EN 60808).
Immunity
ESD (Electrostatic Discharge)
(EN 61000-4-2, IEC 61000-4-2)
One of the main interference sources, along with switching through radio interference, is electrostatic discharge from people and equipment.
Burst
(EN 61000-4-4, IEC 61000-4-4)
One of the most common and most dangerous sources of interference are transient disturbances such as those originating from switching transients (interruption of inductive loads, relay contact bounce, etc.). The burst test measures the resistance of the device to repetitive fast transients.
Surge
(EN 61000-4-5, IEC 61000-4-5)
This test procedure measures the behaviour of a device when subjected to high-energy pulses. Sources of such pulses are switching events due to lightning strikes, short-circuits, or switching cycles which vary in time and place. Surge test on SCHURTER filters are according to IEC 60939.
Specification of the burst test impulse to IEC 61000-4-4
Surge voltage form in open circuit
Guideline for the selection of ESD test levels
| Class | Relative ambient humidity as low as [%] | Antistatic material (floor) | Synthetic material (floor) | Level air discharge (kV) | Level contact discharge (kV) |
| Class 1 | 35 | x | 2.00 | 2.00 | |
| Class 2 | 10 | x | 4.00 | 4.00 | |
| Class 3 | 50 | x | 8.00 | 6.00 | |
| Class 4 | 10 | x | 15.00 | 8.00 |
Recommended test levels for Fast Transient/Burst (acc. IEC 61000-4-4)
| Test levels | The installation is characterized by following attributes | Voltage peak: [kV] | Repetition rate [kHz] | |
| Power supply | Signal ports | |||
| Level 1 Well-protected environment | - Suppression of all EFT/B* in the switched power supply circuits - Separation between power supply lines and control and measurement circuits - Shielded power supply cables with the screens earthed at both ends | 0.50 | 0.25 | 5.0 |
| Level 2 Protected environment | - Partial suppression of EFT/B* in the power supply and control circuits - Separation of all the circuits from other circuits associated with environments of higher severity levels - Physical separation of unshielded power supply and control cable from signal and communication cables | 1.00 | 0.50 | 5.0 |
| Level 3 Typical industrial environment | - No suppression of EFT/B* in the power supply and control circuits - Poor separation of the industrial circuits from other circuits - Dedicated cables for power supply, control, signal and communication lines - Poor separation between power supply, control, signal and communication cables | 2.00 | 1.00 | 5.0 |
| Level 4 Severe industrial environment | - No Suppression of EFT/B* in the power supply and control and power circuits - No separation between power supply, control, signal and communication cables - Use of multicore cables in common for control and signal lines | 4.00 | 2.00 | 2.5 |
| *EFT/B: Electrical Fast Transient/Burst | ||||
Installation classification for Surge Immunity test (acc. IEC 61000-4-5)
| Class | Environment definition | Voltage peak [kV] | |
| L → N [2kΩ] | L/N → PE [12Ω] | ||
| Class 0 well-protected environment | - All cables with overvoltage protection - Well-designed earthing system - Surge voltage may not exceed 25 V | - | - |
| Class 1 Partly protected environment | - All cables with overvoltage protection, well interconnected earth line network - Power supply completely separated from the other equipment - Surge voltage may not exceed 500 V | - | 0.50 |
| Class 2 | - Separate earth line to earthing system - The power supply is separated from other circuits - Non-protected circuits are in the installation, but well separated and in restricted numbers - Surge voltage may not exceed 1000 V | 0.50 | 1.00 |
| Class 3 | - The installation is earthed to the common earthing system - Protected electronic equipment and less sensitive electric equipment on the same power supply network - Unsuppressed inductive loads are in the installation | 1.00 | 2.00 |
| Class 4 | - The installation is connected to the earthing system for the power installation - Current in the kA range due to earth faults - The power supply network can be the same for both the electronic and the electrical equipment - Surge voltages may not exceed 2000 V | 2.00 | 4.00 |
| Class 5 | - Electrical environment for electronic equipment connected to telecommunication cables - The interference voltages can be extremely high - All cables and lines are provided with overvoltage protection | dep. on the local power supply network | dep. on the local power supply network |
Comparison of International Requirements for Surge Tests
Compared to the IEC standard, the surge load test according to ANSI or DOE is not carried out under the same test conditions. SCHURTER therefore tests e.g. fuses with increased pulse resistance according this ratings to ensure that these products meet the local requirements.
| Norm | IEC | ANSI/IEE | DOE | |||||
| Reference | 6100-4-5 | 6100-4-5 | C62.41.2-2002 | C62.41.2-2002 | IEEE C62.41.2 | IEEE C62.41.2 | IEEE C62.41.2 | |
| Class | Installation Class 3 | Installation Class 4 | Location Cat. A | Location Cat. B | Location Cat. C Low | Location Cat. C Mid | Location Cat. C High | |
| Pulse Form 1) | ||||||||
| Voltage | 2kV | 4kV | 6kV | 6kV | 6kV | 10kV | 20kV | |
| Current | 1kA | 2kA | 0.5kA | 3kA | 3kA | 5kA | 10kA | |
| Resistance | 2Ω | 2Ω | 12Ω | 2Ω | 2Ω | 2Ω | 2Ω | |
| Strikes | 40 | 40 | 10 per line | 10 per line | 10 per line | |||
| Conditions | 5+ and 5- at phase angles 0/90/180/270 | 5+ and 5- at phase angles 0/90/180/270 | ||||||
| Current Level | 1kA | 2kA | 0.5kA | 3kA | 3kA | 5kA | 10kA | |
| Current Waveform | 8x20μs | 8x20μs | 8x20μs | 8x20μs | 8x20μs | 8x20μs | 8x20μs | |
| Test Impedance | 2Ω | 2Ω | 12Ω | 2Ω | 2Ω | 2Ω | 2Ω | |
| Total Strikes | 40 | 40 | 20 | 20 | 20 | 20 | 20 | |
| 1) 1.2×50μs Voltage 8×20μs Current Combination Wave | ||||||||
Filter assemblies
Three types of mains noise suppression filter assemblies are used in practice:
Collective suppressor
The collective suppressor principle results in one filter per plant. This has to cope with the entire power input. In addition, all of the connecting cables have to be shielded. Furthermore interference generated by «A» device can reach other devices for instance «B» or «C» through the connecting cables. The following example promises to be a more economical solution. In many cases, the single suppressor principle is the most economical
solution.
Single suppressors
The principle of individual interference will in many cases the most economical solution.
Combined single and collective suppressor
From the technical point of view, only the combined application of both suppression techniques can result in a significant improvement.
Interference propagation
In the field of interference and RF suppression, the most significant means of transmission is the direct electrical connection, i.e. the connecting wiring. The radiation coupling is also important from the electromagnetic compatibility (EMC) point of view; it cannot, however, be dealt with here.
Interference propagation
The capacitive and inductive coupling effects occur inside the case. These could be:
- Capacitive coupling through the coupling capacity of a mains transformer.
- Inductive coupling through control system wiring in parallel.
The introduction briefly mentioned the possibility of the mains filter operating with a double function. Depending on the main area of application, these filters are designated as either RF SUPPRESSION FILTERS or INTERFERENCE SUPPRESSION FILTERS.
The one filter may, therefore, appear under two references in the documentation. A filter is also classified by its mechanical design as well as its electrical data.
RF SUPPRESSION FILTERS impede the propagation of RF interference, generated by an electronic or electrical device into the mains. They also ensure an interference-free radio reception in the immediate vicinity.
INTERFERENCE SUPPRESSION FILTERS prevent mains interference from affecting electronic equipment. They enable an interference- free operation even in the case of a power supply badly affected by mains interference.
It is common to operate the mains filter in both directions in the one piece of equipment, allowing it to fulfil its double function as both interference and RF suppression filters as specified.
Common- and differential mode interference
Filter engineering differentiates between common and differential mode interference originating from supply lines.
In the case of a non-earthed interference source, interference at first only propagates along the connecting lines. Like the mains AC current, the parasitic current flows to the user on one lead, and returns to the interference source on the other. Both these currents are in differential mode. This type of interference is therefore referred to as differential mode interference.
Due to the mechanical configuration and its parasitic capacitance, parasitic currents are also generated in the earthing circuit. This parasitic current flows on both connecting leads to the user and over an earthed lead back to the interference source. Both currents on the connecting lead are in common mode. This type of interference is therefore referred to as common mode interference.
Filter classification
For easy reading of the catalog data, SCHURTER uses the following simplified filter classification:
Differential Mode and Common Mode Attenuation
| Attenuation value | |||
| Standard | Medium | High | Excellent |
| 20-50 dB | 40-70 dB | 60-80 dB | 70-95 dB |
Leakage Current Classification
| Operating leakage current | |||
| Medical | Standard | Industrial | Other |
| <0.1 mA | <0.5 mA | <5 mA | >5 mA |
Medical Filter
SCHURTER medical filters comply with UL 60601-1 and IEC 60601-1 standard specifications and are available in two versions, which differ in terms of their leakage current values.
Medical Filter (M5)
1) Line
2) Load
Medical Filter (M80)
1) Line
2) Load
Standard medical filters for direct person contact supplied by SCHURTER have a leakage current value of <5 μA (M5). This can only be achieved without Cy. Here, a common mode fault current against earth is not attenuated and the filter acts only on differential mode fault currents. In addition, an inlet in protection class II can be used here, as no earth connection exists. However, if an earth connection is desired, Type (M80) can be used for indirect person contact; this has a leakage current of <80 μA which is below the required limit value of 0.1 mA. Type (M80) is manufactured to special order.
Bleed resistor
Medical filters and filters with a X-capacitor >100 nF have a bleed resistor so that no inadmissible rest voltage occurs at the touchable pins of the inlet.
Bleed resistor
Medical filters and filters with a X-capacitor >100 nF have a bleed resistor so that no inadmissible rest voltage occurs at the touchable pins of the inlet.
Fuse Drawer
Fuseholders, part of a power entry module
Fusedrawer 1
Fusedrawer 2
Fusedrawer 3
Explanations, thermal requirements, selection criteria
Protection against electric shock (against direct contact with live parts) for fuseholders
The assessment of the protection against electric shock assumes that the fuseholder is properly assembled, installed and operated as in normal use, e.g. on the front panel of the equipment. IEC 60127-6 and EN 60127-6 divides into three categories:
| Category | Features |
| PC1 | Fuseholders without integral protection against electric shock.They are only suitable for applications where corresponding additional means are provided to protect against electric shock. |
| PC2 | Fuseholders with integral protection against electric shock live part is not accessible: - when the fuseholder is closed - after the fuse carrier (incl. fuse-link) has been removed - either during insertion or removal of the fuse carrier (incl. fuse-link) Compliance is checked by using the standard test finger specified in IEC 60529. |
| PC3 | Fuseholder with enhanced integral protection against electric shock The requirements for this category are the same as those for category PC2, with the exception that the testing is carried |
Extra-safe handling with SCHURTER power entry modules
Protection against contact with live parts is an important aspect when dealing with electrical connecting devices. Both your customers and your servicing engineers will appreciate the greatest possible protection against accidental contact with live parts – something which can easily happen as a result of inappropriate use, or during servicing or repair work.
In particular, our “shock-safe”, “extra-safe fuse-drawers” and “protective covers” precautions are effective ways of protecting against accidental contact when using the power entry modules.
Example:Power entry module with fuseholder, shocksafe category PC2
| Closed fuseholder and appliance inlet. |  |
| It is not possible to touch any live parts on the SCHURTER fuseholders when the fuse-carrier is extracted. |  |
| When a fuse-link 5 x 20 mm or 6,3 x 32 mm (1/4'' x 11/4'') is inserted or replaced, neither the fuse nor the fuse-carrier can come in contact with any live parts. |  |
The extra-safe versions of shock-safe power entry modules are now available.
They are thus also able to satisfy requirements of the following standard: IEC 60601-1 (medical equipments).
| The drawer can only be extracted with the aid of a tool (e.g. screwdriver) so that opening by hand is quite impossible. |  |
 |
Influencing factors
The design engineer of electrical equipment is responsible for its safety and functioning to humans, animals and real values. Above all, it is his task to make sure that the state of the art as well as the valid national and international standards and regulations be observed.
In view of the safety of electrical equipment the selection of the most suitable fuseholder is of great importance. Among other parameters, one has to make sure that the maximum admissible power acceptances and temperatures defined by the manufacturer are followed. Differing definitions and requirements in the most important standards for fuse-links and fuseholders are time and again origin for the incorrect selection of fuseholders.
To equate the rated current of a fuse-link with the rated current of the fuseholder, may, especially at higher currents, cause high, not admissible temperatures, when the influence of the power dissipation in the contacts of the fuseholder was not taken into consideration.
For a correct selection the following influence factors depending on the application and mounting method, have to be followed:
1.␉Rated power dissipation of the suitable fuse-link.
2.␉Admissible power acceptance, operating current and temperatures of the suitable fuseholder.
3.␉Differing ambient air temperature outside and inside of the equipment.
4.␉Electrical load alternation
5.␉Long time (> 500 h) operation with load > 0.7 In.n
6.␉Heat dissipation/cooling and ventilation. Heat influence of adjacent components.
7.␉Length and cross section of the connecting wire.
Rated current of a fuseholder
The value of current assigned by the manufacturer of the fuseholder and to which the rated power acceptance is referred.
Rated power dissipation of the fuse-link
(power dissipation at rated current)
See sep. catalog “fuses”.
Rated power acceptance and admissible temperatures of a fuseholder
The rated power acceptance of a fuseholder is determined by a standardised testing procedure according to IEC 60127-6. It is intended to be the power dissipation caused by the inserted dummy fuse-link at the rated current of the fuseholder and at an ambient air temperature of TA1= TA2 = 23 °C (over a long period). During this test the following temperatures must not be exceeded on the surface of the fuseholder:
| Fuseholder surface area | Maximum allowable temperature measuring points | |
| (see figure 1) | °C | |
| 1. Accessible parts 1) | TS1 | 85 |
| TS2 | 2) | |
| NOTES: 1) When the fuse-holder is properly assembled, installed and operated as in normal use, e.g. on the front panel of equipment. 2) The maximum allowable temperature of the used insulating materials corresponds to the Relative Temperature Index (RTI) according to IEC 60216-1 or UL 746 B. | ||
Illustration of temperatures experienced
TA1␉= ambient air temperature, surrounding the equipmentA1
TA2␉= ambient air temperature in the equipmentA2
TS1␉= temperature of accessible parts on fuseholder surfaceS1
TS2␉= temperature of inaccessible parts on fuseholder surfaceS2
Correlation between operating current I, ambient air temperature TA1 and the power acceptance Ph of the fuseholderA1h
This correlation is demonstrated by derating curves.
Example of a derating curve
I =operating current of the fuseholder
In =rated current of the fuseholder
The derating curves demonstrate the admissible power acceptance of a fuseholder depending on the ambient air temperature TA1 for the following fuseholder operating currents: I << In, I = 0,7 · In and I = 1,0 · In. This power acceptance corresponds to the max. admissible power dissipation of a fuse-link.
A calculation example can be looked up in the technical information for fuses.
Protection aggainst contact
Protection against electric shock (against direct contact with live parts), for fuseholders
The assessment of the protection against electric shock assumes that the fuseholder is properly assembled, installed and operated as in normal use, e.g. on the front panel of the equipment.
IEC 60127-6 and EN 60127-6 divides into three categories:
| Category | Features |
| PC1 | Fuseholders without integral protection against electric shock. They are only suitable for applications where corresponding additional means are provided to protect against electric shock. |
| PC2 | Fuseholders with integral protection against electric shock live part is not accessible: - when the fuseholder is closed - after the fuse carrier (incl. fuse-link) has been removed - either during insertion or removal of the fuse carrier (incl. fuse-link) Compliance is checked by using the standard test finger specified in IEC 60529. |
| PC3 | Fuseholder with enhanced integral protection against electric shock The requirements for this category are the same as those for category PC2, with the exception that the testing is carried out with a rigid test wire of 1 mm diameter accor ding to IEC 60529, table VI, instead of the standard test finger. |
a) Closed fuseholder
b) When the fuse carrier is removed, no live parts can be touched.
c) During insertion or removal of a fuse-link no live parts can be touched neither through the fuse-link nor the fuse carrier.
Remarks on PC 3
Thermal requirements of the fuseholder
Influencing factors
The design engineer of electrical equipment is responsible for its safety and functioning to humans, animals and real values. Above all, it is his task to make sure that the state of the art as well as the valid national and international standards and regulations be observed.
In view of the safety of electrical equipment the selection of the most suitable fuseholder is of great importance. Among other parameters, one has to make sure that the maximum admissible power acceptances and temperatures defined by the manufacturer are followed. Differing definitions and requirements in the most important standards for fuse-links and fuseholders are time and again origin for the incorrect selection of fuseholders.
To equate the rated current of a fuse-link with the rated currentof the fuseholder, may, especially at higher currents, causehigh, not admissible temperatures, when the influence of thepower dissipation in the contacts of the fuseholder was not takeninto consideration.
For a correct selection the follwing influence factors depending on the application and mounting method, have to be taken into consideration.
It is recommended testing the fuseholder with the choosenfuse-link in the worst case operating condition.
1.␉Rated power dissipation of the suitable fuse-link.
2.␉Admissible power acceptance, operating current and temperatures of the suitable fuseholder.
3.␉Differing ambient air temperature outside and inside of the equipment.
4.␉Electrical load alternation
5.␉Long time (> 500 h) operation with load > 0.7 In.n
6.␉Heat dissipation/cooling and ventilation. Heat influence of adjacent components.
7.␉Length and cross section of the connecting wire.
Rated current of a fuseholder
The value of current assigned by the manufacturer of the fuseholder and to which the rated power acceptance is referred.
Rated power dissipation of the fuse-link
(power dissipation at rated current)
Rated power acceptance and admissible temperatures of a fuseholder.
The rated power acceptance of a fuseholder is determined by a standardised testing procedure according to IEC 60127-6. It is intended to be the power dissipation caused by the inserted dummy fuse-link at the rated current of the fuseholder and at an ambient air temperature of TA1= TA2 = 23 °C (over a long period). During this test the following temperatures must not be exceeded on the surface of the fuseholder:
| Fuseholder surface area | Maximum allowable temperature measuring points | |
| (see figure 1) | °C | |
| 1. Accessible parts 1) | TS1 | 85 |
| 2. Inaccessible parts 1) Insulating parts | TS2 | 2) |
Illustration of temperatures experienced in practice
TA1␉=␉ambient air temperature, surrounding the equipmentA1
TA2␉=␉ambient air temperature in the equipmentA2
TS1␉=␉temperature of accessible parts on fuseholder surfaceS1
TS2␉=␉temperature of inaccessible parts on fuseholder surfaceS2
Correlation between operating current I, ambient air temperature TA1 and the power acceptance Ph of the fuseholder.A1h
This correlation is demonstrated by derating curves.
Example of a derating curve
I = operating current of the fuseholder
In = rated current of the fuseholder
The derating curves demonstrate the admissible power acceptance of a fuseholder depending on the ambient air temperature TA1 for the following fuseholder operating currents: I << In, I = 0.7 · In and I = 1.0 · In. This power acceptance corresponds to the max. admissible power dissipation of a fuse-link.
The corresponding values for other operating currents can be interpolated between the existing curves or calculated as follows:
P h = P o - P c = P o - (R c · I 2 )
Ph=␉␉admissible power acceptance in watt of the fuseholder, depending on TA1.hA1
Po=␉␉admissible power acceptance in watt of a fuseholder at I << In, depending on TA1. The values can be taken from the derating curve I << In of the corresponding fuseholder.onA1n
Pc=␉␉power dissipation in watt in the fuseholder contacts at the operating current in ampere.c
I␉=␉␉operating current in ampere of the fuseholder.
Rc=␉␉contact resistance in ohm between the fuseholder terminals according to SCHURTER’s catalogue.c
Selection
Selection of a suitable fuseholder with respect to the power acceptance at the corresponding ambient air temperature.
Summary
The adherence to the limits, indicated by SCHURTER, in particular the power acceptance limits at the corresponding ambient air temperatures and mounting conditions of the fuseholder, is important for the safety of the product. It is therefore necessary to observe the following two steps:
Step 1
Selection of the fuseholder based on the power acceptance
Ph at operating current I and maximum ambient air temperature TA1.
Pf␉≤␉␉Ph = Po - Pc = Po - (Rc · I2)fhococ2
Pf␉=␉␉rated power dissipation in watt of the fuse-link, calculated from (In . U), whereas:fn
In␉=␉␉rated current in ampere of the fuse-linkn
ΔU=␉␉voltage drop in volt at In; values according to SCHURTER's catalog.n
␉␉␉Ph, Po, Pc, Rc = see pos. 2.5hocc
Step 2
The reduction of the power acceptance of the fuseholder (from step 1) based on the different conditions at the mounting place etc. have to be determined by the design engineer responsible.
Examples:
•␉ambient air temperature is considerably higher inside of an equipment than outside (TA2 > TA1)A2A1
•␉cross-section of the conductor, unfavourable heat dissipation
•␉heat influence of adjacent components
Therefore, temperature measurements on the appliance under normal and faulty conditions are absolutely necessary.
Example
What's given?
•␉Fuse-link FSF 0034.1523, rated current In = 5 A. Voltage drop ΔU at In = 80 mV, typ. nn
Rated power dissipation Pf = (In · Δ) = (5 A · 0.08 V) = 0.4 W.f
•␉Fuseholder FEF 0031.1081, rated current In = 10 An
␉Rated power acceptance at TA1 23 °C = 3,2 W.A1
•␉Ambient air temperature = 50 ºC.
␉Admissible power acceptance Ph at an ambient air temperature TA1 50 °C according to the derating curve:hA1
Ph at I << In = 2.5W
I = 0.7 · In = 7 A = 2.2W
I = 1.0 · In = 10 A = 2 W
•␉Contact resistance Rc = 5 mΩc
What is the admissible power acceptance Ph of the fuseholder?h
SolutionsSolutions
␉The result of the interpolation for the rated current I = 5 A
␉is a Ph of approx. 2,4 W.h
␉The result of the calculation is
␉Ph = Po – (Rc · I2) = 2.5 – (0.005 · 52) = 2.37 W P≈2.4 W.hoc
Derating curves of the fuseholder, type FEF, rated current In = 10 An
Verification of the thermal requirements
Step 1
The following condition must be fulfilled:
Pf Ph this means: the rated power dissipation Pf of the fuse-linkfh
␉␉␉must be less/equal than the admissible power acceptance
␉␉␉Ph of the fuseholder.
Pf = 0.4 W; Ph = 2.4 W at TA1 = 50 °CfhA1
Step 2Step 2
To consider the different conditions at the mounting place
Conclusion (without consideration of step 2)
•␉The value Pf is less than Ph. The condition according to formula is fulfilled. It has been chosen a suitable fuseholder.fh
•␉If the value Pf were greater than Ph the condition wouldn't be fulfilled. In that case, do select another fuseholder with a higher power acceptance or change the thermal conditions at the fuseholder mounting place.fh
Standards for fuseholders
IEC 60127-6␉Fuseholders for miniature fuse-links
NF C93-436␉Fuseholders for professional purposes
UL4248-1␉␉Fuseholders
CSA C22.2 NO. 4248.1-07␉Fuseholder assemblies
IEC: International Electrotechnical Commission
UL: Underwriters Laboratories Inc. USA
CSA: Canadian Standards Association
NF: French Standard
Explanation to the main fuseholder standards
As mentioned in section 2, the most relevant standards define rated current and rated power acceptance differently. This lead in the past often to confusion or even to a wrong fuseholder design-in.
For example the standard UL 512 does not define a maximum power acceptance value, but sets a certain value of temperature rise for the fuseholder. For this reason the marked amperage values on the fuseholder, defined by UL and CSA, are not suggested to be used except in special cases.
In order to eliminate such confusion, SCHURTER new decided to define the rated current and rated power acceptance values according to IEC 60127-6 and EN 60127-6.
The most important definitions are to be found in section 2.
Conclusion
• The high UL and CSA current ratings are replaced by more realistic rated currents defined by SCHURTER.
•␉Focused on the new fuseholder standard IEC 60127-6 and EN 60127-6, the power acceptance of several fuseholders had to be reduced.
•␉The design-in procedure and in particular to choose the correct fuseholder in terms of thermal requirements (refer to section 2-4) is now made much easier.
Your advantages:
•␉More security for your equipment
•␉Faster and much easier selection of the correct fuseholder
Explanations / Standards
Explanations, application notes
The design engineer of electrical equipment is responsible for its safety and functioning to humans, animals and real values. Above all, it is his task to make sure that the state of the art as well as the valid national and international standards and regulations be observed.
The following information about fuse-links and their application are to be taken into consideration when selecting a fuse-link.
In view of the product liability of electrical equipment the selection of the most suitable fuse-link is of great importance.
1. Fuse
A fuse is a self-acting device that, by the fusing of one of its specially designed and proportioned components, opens the circuit in which it is inserted by breaking the current when this exceeds a given value for a sufficient time.
Definition according to IEC 60127:
The fuse comprises all the parts that form the complete device, that means fuseholder and fuse-link.
Definition according to UL 248-1:
A North American fuse is an IEC fuse-link. An IEC fuse is a North American fuse with a fuse-holder.
2. Fuse-link (IEC 60127)
The part of a fuse including the fuse-element intended to be replaced after the fuse has operated. Fuse-links according to IEC 60127 relate to miniature fuses for the protection of electric appliances, electronic equipment and components thereof normally intended to be used indoors. These fuse-links are not permitted for equipment, which has to operate under special circumstances, e.g. in a corrosive or explosive environment.
3. Miniature fuse-link (IEC 60127)
An enclosed fuse-link of rated breaking capacity not exceeding 2 kA and which has at least one of its principal dimensions exceeding 10 mm.
4. Sub-miniature fuse-link (IEC 60127)
A miniature fuse-link of which the case (body) has no principal dimensions exceeding 10 mm.
Sub-miniature fuse-links are especially suitable for printed circuit boards. They are available for the through hole technique and surface mounting technique (SMT).
Standards for fuse-links
5. Standards for fuse-links
| IEC 60127 | Miniature fuses (general title) | |
| IEC 60127-1 | Part 1: | Definitions for miniature fuses and general requirements for miniature fuse-links |
| IEC 60127-2 | Part 2: | Cartridge fuse-links |
| IEC 60127-3 | Part 3: | Sub-miniature fuse-links |
| IEC 60127-4 | Part 4: | Universal modular fuse-links |
| IEC 60127-5 | Part 5: | Guidelines for quality assessment for miniature fuse-links |
| NF C 93–435 | Cartridge fuses with improved characteristics | |
| UL 248-1 | Low-voltage fuses: General requirements | |
| UL 248-14 | Low-voltage fuses: Supplemental fuses | |
| CSA/C22.2 No. 248.1 | Low-voltage fuses: General requirements | |
| CSA/C22.2 No. 248.14 | Low-voltage fuses: Supplemental fuses | |
Electrical ratings
6. Rated voltage Unn
The rated voltage is the voltage up to which the fuse-link correctly interrupts an overcurrent.
The rated voltage of a fuse-link must be greater than or equal to the operating voltage of the equipment which is to be protected.
The use during operating voltages below the rated voltage of the fuse-link is permitted only, when the instructions regarding voltage drop (pos. 8) are taken into consideration.
The fuse-links are on principle suitable for use at alternating and direct voltage. The breaking capacity at direct-voltage is however considerably lower than the one at alternating voltage. The performance of the fuse-link at direct-voltage mainly depends on the size of the time-constant T = L/R of the load circuit.
7. Rated current Inn
The rated current of the fuse-link corresponds to the operating current of the equipment to be protected. Basically there are two different rated current definitions:
a) On fuse-links according to IEC 60127 and EN 60127 the rated current corresponds to the current, which the fuse-link can be exposed to continually, according to the standardized regulations, without interrupting the fuse-link.
b) On fuse-links according to UL 248-14 however, the rated current corresponds to the current, which would interrupt the fuse-link already after a few hours. The current, which according to IEC, can flow constantly without interrupting the fuse-link, is approx. 0.7 · In.n
Regarding influences of ambient air temperatures > 23 °C on the rated current see pos. 1
Correlation between the rated current of fuse-links according to IEC and UL:
8. Voltage drop
The voltage drop across a fuse-link is measured at an ambient air temperature of 23 °C, when the fuse-link has carried its rated current for a time sufficient to reach temperature stability. Attention is drawn to the fact that problems can arise when fuse-links are used at operating voltages considerably lower than their rated voltage. Due to the increase of the voltage drop when the element of a fuse-link approaches its melting point, care should be taken to ensure that there is sufficient circuit voltage available to cause the fuselink to interrupt the current when an electrical fault occurs. Furthermore, fuse-links of the same type and rating may, due to difference in design or element material, have different voltage drops and may therefore not be interchangeable in practice when used in applications with low circuit voltages, especially in combination with fuse-links of lower rated currents.
9. Non fusing current Infnf
A value of an over-current specified as that which the fuse-link is capable of carrying for a specified time (typical 1 hour) without melting.
10. Pre-arcing time/current characteristic (at Ta 23 °C)a
The time-current-characteristic indicates the relation of the pre-arcing time (melting time) to the fault current.
The pre-arcing time is the interval of time between the beginning of a current large enough to cause a break in the fuse-element and the instant when an arc is initiated.
The arcing time is the interval of time between the instant of the initiation of the arc and the instant of final arc extinction. The arcing time is not considered in the time-current-characteristic.
The operating time (total clearing time) is the sum of the pre-arcing time and the arcing time.
The time-current-characteristics are shown as an envelope for all mentioned rated currents.
Usual time-current-characteristic and their symbols:
FF:␉denoting very quick acting
F:␉denoting quick acting
M:␉denoting medium time-lag
T:␉denoting time-lag
TT:␉denoting long time-lag
UL fuse-links are normally divided into:
•␉Non time delay fuse-links. These fuse-links are sometimes also referred to as normal blow or quick acting types.
•␉Time delay fuse-links. These fuse-links are sometimes also refered to as slow blow or surge proof types.
Application notes for the various characteristics:
FF:␉Super-quick-acting fuse-links
␉Protection of semiconductors (thyristors, triacs, diodes).
␉This fuse type tolerates small overcurrents only during a short period of time and limits the current at small short circuit currents. Current limiting even with low short circuit currents.
F:␉Quick-acting fuse-links
␉Protection of semiconductors and of an equipment with no current surge when operating or switching on and also for such devices where high overcurrent or high short-circuit current must be interrupted quickly.
M:␉Medium time lag fuse-links
␉Protection devices subjected to moderate in-rush currents and/or overcurrent peaks for a short time. Low voltage drop.
T:␉ Time-lag fuse-links
␉Protection of devices subjected to high in – rush currents and/or overcurrent peaks which decrease only slowly (e.g. transformers and motors).
TT:␉Super time-lag fuse-links
␉Protection of devices subjected to longer lasting in-rush currents and/or high overcurrent peaks.
11. Breaking capacity of a fuse-link (UL: interrupting rating IR)
A value (r.m.s. for alternating current) of prospective current that a fuse-link is capable of breaking at a stated voltage under prescribed conditions of use and behaviour.
The max. short-circuit current, which can occur in electric circuit of an equipment, due to fault conditions, may not exceed the breaking capacity of the fuse-link. Non-compliance of this rule can cause the danger of explosions and fire.
At direct current the breaking capacity of a fuse-link is lower than at alternating current. Values are given on request.
IEC 60127 miniature fuse-links are classified into two categories (for sub-miniature fuse-links other breaking capacities are defined).
Fuse-links with low breaking capacity, symbol L:
Typically, the fuse-element of this type of fuse-link is visible. The insulation tube consists of transparent material, normally glass. There is no extinguishing medium, the arc is quenched in air.
The breaking capacity is:
250 VAC/35A or 10.In p.f.1 whichever is greater.
Fuse-links with high breaking capacity, symbol H:
Typically, the fuse-element of this type of fuse-link is not visible. The insulation tube normally is of ceramic material or glass. To quench the arc, there is often an extinguishing medium.
The breaking capacity is:
250 VAC 1500A p.f. 0.7 to 0.8
UL's and CSA's short circuit requirements (interrupting rating IR) are different as relates to IEC.
Interrupting ratings at 125 VAC = 10’000 A } p.f. 0.7-0.8
250 VAC = 35 to 1500 A
depending on rated current of the fuse-link.
12. Power dissipations
12.1. Max. sustained power dissipation
a) Fuse-links according to IEC 60127:
The test is carried out according to a standardised test procedure (open fuse-holder, room temperature).
The power dissipation produced by the non fusing current Inf after one hour is determined.
Non fusing currents are different and depend on the fuse-link type.
In the SCHURTER catalogue you will usually find two values of sustained power dissipation, namely:
•␉the maximum sustained power dissipation i.e. according to IEC 60127.
•␉The typical sustained power dissipation of the SCHURTER fuselinks.
These values are mostly lower than the standardised ones.
b) Fuse-links according to UL 248-14:
UL does not, like IEC, determine the sustained power dissipation, but measures the maximum permissible temperature increase from 75 °C at 1 · In on the outer surface of the fuse-link according to the UL standard.
12.2. Rated power dissipation
The power dissipation caused by the rated current (over a long period). With respect to the power acceptance for the selection of a suitable fuseholder this rated power dissipation is considered.
13. Pulse strength/thermal behaviour
I2t-value (joule integral)2
The integral of the square of the current over a given time interval. The I2t-value is a measure of the energy required to disrupt the fuselink. That means for heating up the fuse-element to its melting temperature, for melting the fuse-element and for interruption of the current via an arcing period. Normally, distinction is made between.
•␉the pre-arcing I2t (or fusing I2t)22
␉is the I2t integral extended over the pre-arcing time of the fuse-link. It represents the energy for heating up and melting the fuseelement. At high over-currents with melting times <10 ms the prearcing l2t remains constant (adiabatic conditions). Sometimes the pre-arcing I2t is determined by 10.times the rated current, based on the time-current-characteristic. The pre-arcing I2t is a characteristic value of a fuse-link and informs about his resistance to pulses and in-rush-currents.2222
•␉the arcing I2t2
␉is the I2t integral extended over the arcing time of the fuse-links. It represents the arc-energy. The arcing I2t depends on the electrical circuit parameters (e.g. operation voltage, power factor, closing angle etc.) of an electrical circuit.22
•␉the operating I2t (or: total I2t)22
␉is the sum of pre-arcing and arcing I2t. This value is an important parameter for the application of a fuse-link. It characterises the energy exposed to the object (let-through-energy) to be protected by the fuse-link in case of a fault current.2
Application notes:
In order to choose the right fuse-link, the permitted I2t-value of the component or component group to be protected, has to be known.
Selection criteria:
The electric circuit to be protected contains:
•␉Components, which can cause in-rush currents, e.g. transformers. In this case, a fuse-link has to be chosen with a pre-arcing I2t-value which is higher than the one of the in-rush-current.2
•␉Components, which are sensitive to current impulses, e.g. semiconductors. In this case a fuse-link has to be chosen, with an operating I2t-value which is lower than the one of the components to be protected.2
Shift of the operating current as a function of ambient air temperature
14. Ambient air temperatures
The standardised current carrying capacity tests (IEC and UL) of fuse-links are performed at 23 °C and 25 °C respectively. In practical applications, the fuse-link’s ambient temperature may be significantly higher, especially if the fuse-link is used in an unexposed fuseholder or mounted near other heat generating components. For such applications, the shift of the operating current according to the following diagram has to be considered.
15. Marking of the fuse-links
Marking according to IEC 127
Additional marking: the respective approval marks
1) symbol, denoting the relative pre-arcing time-current-characteristic
2) rated current in mA or A
3) symbol, denoting the rated breaking capacity
4) rated voltage in V
5) SCHURTER Logo
16. Interchangeability of IEC- by UL fuse-links and vice versa
Fuse-links according to IEC und UL have different features and are on principle not interchangeable. However, after a thorough check of the technical data it may be possible to interchange, when the following, most important requirements are met.
•␉The rated currents must be adapted (see pos.7)
•␉The breaking capacity must be compatible.
•␉The time-current characteristic and voltage drop must be roughly the same.
17. Exchange of fuse-links under load
A fuseholder with an installed fuse-link shall not be used as a «switch» for turning power “on” and “off”.
An opening and closing of electric-circuits may cause current- and voltage surges, depending on the dimension of the electric circuit. Such current or voltage peaks produce an arc between the contact points, which causes an increase of the contact resistance. In order to prevent the fuseholder from permanent damage, a fuselink shall only be exchanged when power in an electric circuit is switched off.
Quality / Reliability / Selection
18. Quality assessment of fuse-links
SCHURTER fuse-links meet with the requirements according to IEC 60127-5 and EN 60127-5.
More detailled information is available on request.
19. Reliability of fuse-link (MIL-HDBK-217F)
The reliability modeling of fuses presents a unique problem. Unlike most other components, there is very little correlation between the number of fuse replacements and actual fuse failures. Generally when a fuse opens, or “blows” something else in the circuit has created an overload condition and the fuse is simply functioning as designed.
Fuse-link selection guide
1. The operating voltage UB of the equipment to be protected defines the rated voltage UN of the fuse-link (see pos. 6) UN ≥ UB For UB << UN please refer to the remarks regarding voltage drop (see pos. 8).BNNBBN
2. The max. operating current of the equipment to be protected defines the rated current of the fuse-link. The different definitions for rated current according to IEC or UL as well as the influence of higher ambient temperatures are to be taken into consideration (see pos. 6 and 14).
3. The possible fault current as well as its permitted operating times in the electric circuit of the equipment to be protected define the time-current-characteristic of the fuse-link (see pos. 10).
4. The necessary breaking capacity of the fuse-link depends on the max. short-circuit current, which can occur under fault conditions in the electric circuit of the equipment to be protected. It must be lower than the max. current which can be interrupted by the fuselink (see pos. 11).
5. The rated power dissipation of the fuse-link is of importance for the selection of the suitable fuseholder (see pos. 12.2).
6. If current impulses occur in the electric circuit of the equipment to be protected, which may not interrupt the fuse-link under any circumstances or if the let-through-energy of the fuse-link may only reach a certain value (eg. protection of semi-conductors) the I2t values have to be taken into consideration accordingly (see pos. 13).2
7. The necessary approvals are mostly defined by national and international standards for equipment. SCHURTER fuse-links are according to international standards and were approved by the different agencies (refer to data sheets for the individual fuse-links).
8. It is essential that the selected fuse-links/fuse-holders that are fitted to the equipment to be protected, are being tested under normal and fault conditions, even if all relevant criteria for selection have been taken into consideration.
Power entry modules with filter
Same requirements are valid for filters as for RF suppression chokes.
Industrial mains filters
Frequency range 0.01 MHz ... 1000 MHz
General information
Electromagnetic compatibility (EMC) is the capability of electrical equipment (installations, devices, assemblies) to operate effectively in its electromagnetic environment (Immunity), without in turn irresponsibly affecting this environment (Emission).
Mains filters of various types are used for the protection of electronic circuits, components and equipment against transients or similar interference, on the mains power supply. A suitable filter can be selected from the existing product range for each equipment type in accordance with electromagnetic conditions of its environment.
Mains interference can be classified into four categories:
A) Fluctuations in the industrial mains supply
␉(magnetic voltage stabilizer)
B) Harmonic wave interference in the frequency range 100 Hz ... 2 kHz
␉(filter type selective harmonic)
C) Transient interference signals in the frequency range up to
␉300 MHz (filter type low-pass)
D) Sinusoidal interference signals in the frequency range up to
␉1 GHz (filter type broad band, low-pass)
In practice, however, interference is mainly found in the last three categories B, C and D. Superimposed on the high-voltage mains supply, such interference can affect the performance of electronic circuits, or even cause them damage. An optimally-designed mains filter can perform a double function:
Function 1
The filter protects an electronic control circuit from voltage spikes in the mains supply, which may be generated, for example, by electromechanical switches and relays.
Function 2
The same filter also acts simultaneously in the opposite direction. The HF interference generated in the unit by thyristor control is attenuated such that the boundary values Class B, (EN 55011/55022) are maintained.
Filters are usually made up of capacitors and inductance coils. Components such as leakage resistors, surge dissipators and VHF chokes can also be integrated into the filter. Broad band filters
which meet the highest requirements are often composed of 2 or 3 single stages put together to make one filter unit:
Leakage current
The leakage current of a device is mainly determined by the capacity value of the Y-capacitor.
According to international standards (IEC 60335-1) the following regulations with respect to leakage current can be assumed:
| Type of appliance | Protection class | IL max. [mA] | U[V] | f[Hz] |
| Portable appliances | I | 0.75 | 250 | 50 |
| Stationary motor appliances * | I | 3.5 | 250 | 50 |
| Stationary heating appliances | I | 0.75/kW (max. 5.0) | 250 | 50 |
| Appliances | II | 0.25 | 250 | 50 |
| Appliances | I, 0I, III | 0.5 | 250 | 50 |
| * Stationary appliances fixed or weighing in excess of 18 kg (without carrying handle). | ||||
For other applications:
| Ref. | Laboratory | Medical | IT | Test equipment |
| UL | 0.5 mA (UL 61010-1) | 0.1 mA (UL 60601-1) | 3.5 mA (UL 60950) | 5.0 mA (UL 61010-1) |
| IEC | – | 0.1 mA (IEC 60601-1) | 3.5 mA (IEC 60950) | 3.5 mA (IEC 61010-1) |
Further details about leakage currents are also described under filter classification.
Rated voltage UR (Umax)max
The rated voltage UR is the maximum RMS alternating line to line voltage (Umax) which may be applied continuosly to the terminals of the filter. The rated voltage is the nominal voltage including 10% tolerances.
Example:
Filter with UR = 440 VAC is made for a power system with nominal voltage 400 VAC +10%.
For standard three phase filters the voltage between phase and earth is intended UR/√3 (example 440/250 VAC).
Filters made for IT power systems withstand a voltage between phase and earth equal to UR.
SCHURTER filters for IT systems have code endingwith „I“: ex. FMAC-0932-2512I.
The line frequency fN (50/60 Hz) may be exceeded under certain conditions. We recommend the users to consult in any case our technical department. DC power operation is possible in most cases.
Power distribution system
There are three main types of power distribution systems according to IEC 60950 (1.2.12): TN, TT, IT.
The TN POWER SYSTEM is a power distribution system having one point directly earthed, the exposed conductive parts of the installation being connected to that point by protective earth conductors. Three types of TN POWER SYSTEMS are recognized according to the arrangement of neutral and protective earth conductors: TN-S, TN-C-S, TN-C.
Example of a TN-C-S system
TN-C-S is in a system which neutral and protective functions are combined in a single conductors in a part of the system.
Example of a TT system
A TT POWER SYSTEM is a power distribution system having one point directly earthed, the exposed conductive parts of the installation being connected to earth electrodes electrically indipendent of the earth electrodes of the power system.
Example of a IT system
The IT POWER SYSTEM is a power distribution system having no direct connection to earth, the exposed conductive parts of the electrical installation being earthed. In this case the voltage between phase and earth can reach the line to line voltage.
Nominal Current INN
The technical data gives the max continuous supply current in function of the ambient temperature IN/νa. The SCHURTER range generally differentiates between two types of filters:
- High-current filter:␉νa at IN␉= 40°CN
␉␉␉νamax␉= 100°Cmax
- All other filters:␉νa at IN␉= 40°CN
␉␉␉νamax␉= 85°Cmax
The permissible working current at higher ambient temperatures can be read from the following graph.
Permissible working current as a function of ambient temperature
Up to the approved nominal ambient temperature a the filter can be operated continuously at its nominal current. Above this temperature the square of the nominal current drops off linearly and reaches its zero point at Tmax (85 or 100 °C).
Derating curve (approx.)
Formula:
I = admissible operating current at elevated ambient air temperature
In = rated currentn
Tmax = max. allowable ambient air temperature Ta (85 °C)max
Ta = ambient air temperaturea
Tn = allowable ambient air temperature at rated current (40 °C)n
IP degrees of protection provided by enclosures (IP code)
Scope
These standards apply to the classification of degrees of protection provided by enclosures for electrical equipment with a rated voltage not exceeding 72.5 kV.
Object
The object of these standards is to give:
a)Definitions for degrees of protection provided by enclosures of electrical equipment as regards:
1. Protection of persons against access to hazardous parts inside the enclosure
2. Protection of the equipment inside the enclosure against ingress of solid foreign objects
3. Protection of the equipment inside the enclosure against harmful effects due to the ingress of water.
b)Designations for these degrees of protection.
c)Requirements for each designation.
d)Tests to be performed to verify that the enclosure meets the requirements of these standards.
Designations
The degree of protection provided by an enclosure is indicated by the IP code.
Elements of the IP code and their meanings
A brief description of the IP code elements is given in the following table.
| IP xy | Meaning for the protection of equipment | Meaning for the protection of persons |
| Against ingress of solid foreign objectif | Against access to hazardous parts with | |
| x = 0 | (non protected) | (non protected) |
| x = 1 | 50 mm diameter | back of hand |
| x = 2 | 12.5 mm diameter | finger |
| x = 3 | 2.5 mm diameter | tool |
| x = 4 | 1.0 mm diameter | wire |
| x = 5 | dust protected | wire |
| x = 6 | dust tight | wire |
| Against ingress of water with harmful effects | ||
| y = 0 | (non protected) | |
| y = 1 | vertically dripping | |
| y = 2 | dripping (15° tilted) | |
| y = 3 | spraying | |
| y = 4 | splashing | |
| y = 5 | jetting | |
| y = 6 | powerful jetting | |
| y = 7 | temporary immersion | |
| y = 8 | continuous immersion | |
| y = 9K | high pressure, i.e. steam jet cleaning |
Information about IP Protection
Information about IP protection levels may vary depending on mounting or application for the various components. Following explanations are supplemented for this purpose.
There are cases where more than one IP value is mentioned for a product. Then this values are separated by a slash or by the term "or". This information is given for families or on series level to indicate that there are different variants with respective IP protection degrees. In some cases there will be further information about the respective conditions to ensure the tightness said.
e.g.. 40 / 54 with sealing kit
IP Protection from Front Side
This mounting perspective means the protection against the ingress of foreign substances from the outside into the interior of the appliance. Accordingly, it comes to the sealing of the offered component against the housing and also the sealing of moveable elements which are accessible from the outside.
IP Protection from Rear Side
This is basically the opposite to the mounting of the front side. The listed IP value means the protection level from the rear side of the selected part, so it is focusing on the inside of the appliance. This information can be important when there is an intention of potting the components inside the housing. This specification is also noted whether a component is suitable for this process.
Detailed IP Information According to Product Feature
If the IP rating of a component is particularly high, then the respective sealing areas have to be addressed in detail in order to explain the requirements for a successful sealing. These detailed mounting instructions are correspondingly provided for the respective products.
The sealing from the component towards the housing is the primary goal. Accordingly here the seal is described against the flange and the attachment area. In addition, more information coming from the moving parts, or even the insertion region.
A) Front view B) Details of front mounting C) Details of rear mounting
1) sealing of flange 2) sealing of fuseholder 3) sealing of screw hole (front mounting type: sealing ring on screw head) 4) sealing of screw hole (rear mounting type: sealing on screw thread)
Information on IP Protection in Unmated and Inserted State
In connector systems, the operating condition is taken into account if a unit has to be tight under current supply, this corresponds to the so-called inserted state.
Otherwise, it may happen that a device must be sealed for transport or cleaning phase in which the power supply cable is not connected to the device. This mentioned case is referred to IP protection when unmated..
Available products to enhance the IP protection level are listed as accessory products. It is important that the necessary components are used according to the specifications as for example using a connector with the proposed cord retainer.
1) Appliance inlet 6100-3 with factory-mounted inlet gasket 2) Flat gasket 3) Chassis 4) Pillar 5) Gasket ring 6) Crinkle washer 7) Nut 8) Retaining clip
Product Overview with IP Protection Level Indication
The IP values are depending on the product range optional or recommended selection criteria in the catalog refinement search. The complementary accessories and matching components are referenced in the respective product data sheets.
Characteristics for connection:
Supply voltage: 24 VDC
Data of standard LEDs
| Colour | Forward Current IF [mA] | Forward Voltage UF [V] |
| red | 40 | 2,0 (IF = 10 mA) |
| green | 40 | 2,0 (IF = 10 mA) |
| yellow | 40 | 2,0 (IF = 10 mA) |
| blue | 20 | 3,2 (IF = 10 mA) |
| red/green (piezo switches) | 20 | 2,0 (IF = 10 mA) |
| red/green (switches with stroke) | 25 | 2,0 / 2,2 (IF = 20 mA) |
2. Ring illumination
This design is homogeneous and available in red, green, yellow, blue and bi-coloured red/green as standard colours. Ring illuminations in other colours are also possible.
Data of standard LEDs
| Colour | Current IF [mA] |
| red | 20 |
| green | 20 |
| yellow | 20 |
| blue | 20 |
Characteristics for connection:
Supply voltage: 24 VDC
Functional Description Piezo Switches IlluminationFunctional Description Piezo Switches Illumination
Ring Illumination
Single or bi-colored ring illumination is possible for the PSE switches.
When equipped with two colors, it is possible to either switch between the colors or to achieve a combination color, depending on the type of activation.
For example: Diodes of group 1 = red and diodes of group 2 = green
Only group 1 is activated → Ring has red illumination
Only group 2 is activated → Ring has green illumination
Both groups are activated at the same time → Ring has orange illumination
Red cable = Supply voltage: red LEDs
Green cable = Supply voltage: green LEDs
Black cable = Minus for all LEDs
White cable = Switch contact
Terminal layout:
Ring Illumination for M24, M27, M30 series - 12 / 24 VDC
Ring Illumination for M22 series - 12 / 24 VDC with Wires
Ring Illumination for M22 series - 12 / 24 VDC with Plug Connector
Ring Illumination Special Type 5 VDC - on request
Point Illumination
When illuminating the PSE switch, either a single-color LED (2 pins) is used or a bi-colored LED (3 pins). If a single-color LED is used, cable No. 2 is not needed (see terminal layout).
Switching between colors can be achieved by appropriate activation.
Terminal layout:
Point Illumination
Line Switch
Switches including Bowden cable actuationSwitches including Bowden cable actuation
Switches can be built both as 1-pole (phase conductor disconnection) and 2-pole (phase and neutral conductor disconnection) units to ensure compliance with the relevant power supply standards. As a matter of principle, high-quality products are used which meet the current requirements and which are well within the given nominal current boundaries as defined by the standard on appliance couplers.
Bowden cable for type KD/KG, CD/CGD/CG
The remote actuator cable assembly consists of a wire cable inside of a plastic insulated spiral wire casing. Identifying a proper routing of the cable assembly is important. Deviations from line to line placement will require bends in the cable with resulting losses in the overall assembly. These inefficiencies show up as friction losses and lost motion. Frictional losses are increases in actuation force due to losses in the assembly. Lost motion is an undesirable difference between the input end of the assembly and the output end. The principle element of lost motion is backlash and deflection. Backlash is caused by the wire cable moving inside the casing with the change in direction of motion. It is the function of clearance between the wire cable and casing, plus the number of degrees of bend in the cable assembly. Deflection of the cable assembly, while usually low, can be minimized by anchoring the casing. This is especially true in those applications of cable assemblies with long lengths and/or large degrees of bend in the system All of these losses and resulting inefficiencies can be reduced by the equipment designer through minimizing the total degress of bend in the assembly. Because of the number of variables effecting proper operation of any remotely actuated switch assembly, it is important that the ordering instructions be used to determine proper cable length and to provide samples for customer approval.
Consult figure for minimum information required to describe cable assembly application.
Order details and description
How to specify length of Bowden cable
R Mounting parallel to direction of actuationR
B1 Actuating partB1
B2 Power entry moduleB2
Dimensions in mm (center of mounting hole [B1], outer surface to center of mounting hole [B2], outer surface)
R a/ b c/
S Mounting 90° to direction of actuationS
B1 Actuating partB1
B2 Power entry module B2
Dimensions in mm (center of mounting hole [B1], outer surface to center of mounting hole [B2], outer surface)
S a/ b/ c/
Ordering example
1. Order No. socket KD14.4199.151
2. Order No. fuse drawer 4303.2024.03
3. Bowden cable (type of mounting / dimensions in mm) * R a/200 b/180 c/40
*The order No. for a customer specific Bowden cable you’ll get with the acknowledgment.
Delivery time for a customer specific Bowden cable sample approx. 2 weeks.
Standard Bowden cable sample, Order No. 0886.0101, ex stock
| Line switch used by type | Technical data | |
| CMF1, CMF2, CMF3, CMF4 | Electrical rating acc. to IEC/EN 61058-1 | 10 (4) A / 250 VAC, 10 000 switch operations 6 (4) A / 250 VAC, 50 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Electrical rating acc. to UL 1054 | 6 A, 125–250 VAC, 6000 switch operations (1/4) HP, 125 VAC (1/2) HP, 250 VAC | |
| Statement in ( ) at inductive load with p. f. 0,45 | ||
| Inrush current acc. to IEC/EN 61058-1 | capacitive 70 A, 3–4 ms continuous current 5 A 10 000 switch operations | |
| Contact gap | ≥3 mm | |
| KM, KMF, PMM, GRM1, GRM2, GRM4 | Electrical rating acc. to IEC/EN 61058-1 | 10 (4) A / 250 VAC, 10 000 switch operations 6 (4) A / 250 VAC, 50 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Electrical rating acc. to UL 1054 | 12 A, 125–250 VAC, 6000 switch operations (1/3) HP, 125 VAC (1/2) HP, 250 VAC | |
| Statement in ( ) at inductive load with p. f. 0.45 | ||
| Meets switching current test acc. to UL 1054, TV-3 | ||
| Inrush current acc. to IEC/EN 61058-1 | capacitive 100 A, 3–4 ms continuous current 5 A 10 000 switch operations | |
| Contact gap | ≥3 mm | |
| KEB1, KFB1 | Electrical rating acc. to DIN/VDE 0630 | 12 (3) A / 250 VAC, 10 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Inrush current acc. to | capacitive 20 A, < 5 ms continuous current 5 A | |
| IEC/EN 61058-1 | 10 000 switch operations | |
| Contact gap | ≥3 mm | |
| DC11, DC12, DC21, DC22, DD11, DD12, DD21, DD22 | Electrical rating acc. to IEC/EN 61058-1 | 16 (4) A / 250 VAC, 10 000 switch operations 10 (4) A / 250 VAC, 50 000 switch operations Statement in ( ) at inductive load with p. f. 0.6 |
| Electrical rating acc. to UL 1054 | 16 A / 125–250 VAC, 6000 switch operations (1) HP 125 VAC / (2) HP 250 VAC Statement in ( ) at inductive load with p. f. 0.45 | |
| Inrush current acc. to IEC/EN 61058-1 | capacitive 100 A, 3-4 ms continuos current 5 A | |
| KP (Schalter), KEB2, KFB2, KD, CD, KG, CG, Felcom 54, Felcom 64, FKH, FKI, FKHD, FKID | Electrical rating acc. to IEC/EN 61058-1 | 12 (4) A / 250 VAC, 10 000 switch operations 8 (8) A / 250 VAC, 50 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Electrical rating acc. to UL 1054 | 15 A, 125–250 VAC, 6000 switch operations (3⁄4) HP, 125 VAC (11⁄2) HP, 250 VAC | |
| Statement in ( ) at inductive load with p. f. 0.45 | ||
| Meets switching current test acc. to UL 1054, TV-3 | ||
| Inrush current acc. to IEC/EN 61058-1 | capacitive 70 A, 3–4 ms continuous current 5 A 10 000 switch operations | |
| Contact gap | ≥3 mm | |
| KD Bowden cable, CD Bowden cable, KG Bowden cable, CG Bowden cable | Electrical rating acc. to IEC/EN 61058-1 | 6 (4) A / 250 VAC, 10 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Electrical rating acc. to UL 1054 | 6 A, 250 VAC, 10 000 switch operations 8 A, 125 VAC, 10 000 switch operations | |
| Inrush current acc. to IEC/EN 61058-1 | capacitive 36 A, < 5 ms continuous current 6 A 6000 switch operations | |
| Contact gap | ≥3 mm | |
| EC11, EC12 | Electrical rating acc. to IEC/EN 61058-1 | 16 (4) A / 250 VAC, 10 000 switch operations 10 (4) A / 250 VAC, 50 000 switch operations |
| Statement in ( ) at inductive load with p. f. 0.6 | ||
| Electrical rating acc. to UL 1054 | 20 A, 125–250 VAC, 6000 switch operations (1) HP, 125 VAC (2) HP, 250 VAC | |
| Statement in ( ) at inductive load with p. f. 0.45 | ||
| Meets switching current test acc. to UL 1054, TV-3 | ||
| Inrush current acc. to IEC/EN 61058-1 | capacitive 100 A, 3–4 ms continuous current 5 A 10 000 switch operations | |
| Contact gap | ≥3 mm | |
| 5145, 6145, DF11, DF12, EF11, EF12 | Conditional short circuit current Inc | 1'000 A |
| Endurance | 50'000 switching cycles at In | |
| Further technical information see data sheet TA45 | ||
| 6135 | Conditional short circuit current Inc | 2'000 A |
| Endurance | 50'000 switching cycles at In | |
| Further technical information see data sheet TA35 2Pole | ||
| 6136 | Conditional short circuit current Inc | 2'000 A |
| Endurance | 50'000 switching cycles at In | |
| Further technical information see data sheet TA35 1Pole |
Circuit breakers for equipment
In addition to switching, a Circuit Breaker for Equipment (CBE) ensures protection against overload. You will find detailed information on CBE as well as a product overview of Power Entry Modules with CBE in the product overview under Circuit Breakers for Equipment.
Suitable appliance couplers according to IEC 60320-1
The suitable connection options for appliance couplers are listed below. The appliance couplers’ contours are coded (type, symbol) so as to allow a ‘hot condition’ connector to fit into a ‘cold condition’ appliance inlet, but not vice versa. Important note: The appliance inlet nominal current rating must be at least identical to that of the appliance!
Combinations according to IEC 60320-1: • intended, □ possible
The available product combinations can be selected under ‘ ’.
Suitable Interconnection Couplers according to IEC 60320-2-2
The suitable connection options for interconnection couplers are listed below. The regulatory framework applicable here is identical to that governing .
Combinations according to IEC 60320-1: • intended, □ possible
The available product combinations can be selected under ‘ ’.
Combinations according to IEC 60320-2-2: • intended, □ possible
Contact Configuration
On standard, non-reversible appliance inlets/outlets, the contacts, when viewing the engagement surfaces from above, must be configured as follows:
Measurment method
Measurement of the leakage current (simplified).
The leakage current is measured from every pole of the network:
- to all accessible metal parts
- to metal parts of protection class II equipment which is separated
only by the base material from parts under voltage.
The test is made with AC at 250 V / 50 Hz.
Measurements are made in both switch positions (see diagram).
Protection class l
Devices are fitted with a special grounding conductor to provide protection against electrical shocks (L,N,PE wire cable). SCHURTER filters correspond to protection class I.
Insertion loss acc. CISPR 17 (common- and differential mode)
Asymmetrical measurement
In common mode measurements, the line and neutral conductors are measured with respect to earth.
Line (L) and neutral (N) are measured to earth (E).
Symmetrical measurement
In differential mode measurements, the insertion transmission loss is measured between line and neutral through a balancing transformer; the earth wire is not used.
4-pole network with integrated balancing transformer for the measurement of insertion transmission loss in the symmetric case.
Measurement method
The insertion loss D is defined as that loss which results when a four-pole network is inserted into an existing layout, having a surge impedance Z, assuming that the LHS and the RHS terminal impedances of the four-pole network are equal in magnitude and real, the insertion transmission loss and the overall loss are the same.
The insertion transmission loss, in decibels, can be obtained as follows:
Insertion loss “alternate test method”
Asymmetrical measurement
Symmetrical measurement
The alternate test method allows the measurement in the GHz frequency range whereas the CISPR 17 method does not cover frequencies above 30MHz. The insertion loss is measured in a throughput method (common mode) and a cross coupled method (differential mode). The differential mode measurement of the alternate test method is not directly comparable to the conventional measurement acc. CISPR 17.
Voltage tests on noise suppression filters complying to EN 133200 II
IEC 60939-2
| Nominal voltage connections | Between | Inner and outer insulation | |
| C*≤ 1 μF | C*> 1 μF | ||
| 150 ≤ UR ≤ 250 VAC | 4.3 UR VDC | 1500 VAC or 2250 VDC | 4.3 UR VDC |
| 250 ≤ UR ≤ 500 VAC | 4.3 UR VDC | 2 kVAC or 3 kVDC | 4.3 UR VDC |
| 500 ≤ UR ≤ 760 VAC | 4.3 UR VDC | 3 kVAC or 4 kVDC | 4.3 UR VDC |
| *) C is the capacity measured between the connection block to which the high voltage is connected for test. | |||
"UL 1283
| Nominal voltage | Between connection | Between connection and case |
| UR ≤ 250 VAC | 1250 VAC or 1768 VDC | 1500 VAC or 2121 VDC |
Application classes (IEC 60068-1)
The aim of this standard is to create a basis for classification of telecommunication engineering electrical components according to application classes which correspond to their climatic and mechanical suitability.
Example:
* relative humidity
MTBF
The high reliability of the products can be excelled from MTBF (meantime between failures). These values are according MIL-HB-217-F class GB at an amient temperatur 40§C at rated voltage and current.
3-stage filter
1st stage
A differential mode acting filter with high energy absorption. Discharging resistors are normally used for Cx capacitors > 100 nF. The capacitors are tested and approved as so-called class X noise suppression capacitors. The 1st stage serves as dl/dt limitation.
2nd stage
A common mode acting filter with a high, broad band attenuation ratio. A ZNR varistor surge serves as the overvoltage suppression component. The earthed capacitors are tested and approved as so-called class Y noise suppression capacitors.
3rd stage
Common mode as well as differential mode acting filter in the HF range up to 300 MHz. Feedthrough capacitors make high attenuation values possible up to the gigahertz range. These capacitors are also class Y type. SCHURTER uses only approved noise suppression capacitors (MKP, MKT) according to IEC 60384-14.
Design
Surface and material
According to requirements and fields of application the switches and keypads are available with various housing materials.
The ideal material for rough environments is high quality stainless steel* with resistant surface. Especially for piezo switches, aluminium or flameproof unbreakable plastic versions are available.
For the mechanical switches, SCHURTER offers housings made of aluminium or diecasted zinc with nickel-plated surface in addition to stainless steel.
For external applications we certainly recommend resistant materials such as stainless steel or aluminum. An additional finish for the keypads is possible with a glass-bead coating.
* Stainless steel surfaces may have slight differences in colour as a result of different batches of preliminary materials.
Colour design
The surfaces of the input systems can be finished according to customer requirements.
Varnishing of switches and keypads in various signal colours is possible. Additional inscriptions are sealed by transparent lacquer. The aluminium housings of the switches can be delivered in various anodised colours. Colouring of the switches using powder coating is available on request.
Shapes and sizes
With a wide variety of shapes and sizes a broad range of standard solutions can be offered.
Keypads are available with round or rectangular actuators. The size of the switch surface is variable up to a diameter of 35 mm.
Piezo switches with a minimum mounting diameter of 16 mm can be adapted in shape and size to customer requirements. Adaptations for integration into individual layouts are also available at short notice.
Order idex lettering
Lettering
Lettering / standard colours
Depending on the application and font, there are various lettering possibilities.
Switches and PC keypads are laser-lettered as standard. For special applications, the lettering can also be etched or engraved with a coloured background.
PC keypads with German, British or U.S. layouts are usually laser-lettered. Further country-specific letterings are available on request ex works.
The following standards can be used for key letterings:
Standard colours for lettering
| Stainless Steel | black, filled lettering | |
| Aluminum natural | grey, filled lettering | Aluminum natural only after receipt of technical release statement of the customer. |
| Aluminum anodised | white, filled lettering | |
| Plastics | on request |
MSM 16
 | Single characters | Helvetica normal DIN1451-1E, Font size 5 mm |
| Symbols (037-052) | True Type symbol, Font size 5 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 3 mm | |
| Legends with max. 6 characters in a line | Helvetica condensed DIN 1451-3E, Font size 2,5 mm |
PSE M16, M19, M24/27/30 RI
 | Single characters | Helvetica normal DIN1451-1E, Font size 5 mm |
| Symbols (037-052) | True Type symbol, Font size 5 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 3 mm |
PSE M22 Non-illuminated / Point illuminated
 | Single characters | Helvetica normal DIN 1451-1E, Font size 5 mm |
| Symbols (037-052) | True Type symbol, Font size 5 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 5 mm |
MCS 19 Non-illuminated / Point illuminated, MCS 30 Ring illuminated
 | Single characters | Helvetica normal DIN 1451-1E, Font size 5 mm |
| Symbols (037-052) | True Type symbol, Font size 5 mm | |
| Legends with max. 3 characters in a line | Helvetica condensed DIN 1451-3E, Font size 2,5 mm | |
| Legends with max. 6 characters in a line | Helvetica condensed DIN 1451-3E, Font size 2,5 mm |
PSE M16 indicator
 | Single characters | Helvetica normal DIN 1451-1E, Font size 3 mm |
| Symbols (037-052) | True Type symbol, Font size 3 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 3 mm |
MSM 19 Non-illuminated / Point illuminated
 | Single characters | Helvetica normal DIN 1451-1E, Font size 8 mm |
| Symbols (037-052) | True Type symbol, Font size 8 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 3 mm | |
| Legends with max. 6 characters in a line | Helvetica condensed DIN 1451-3E, Font size 2,5 mm |
MSM 22 Non-illuminated / Point illuminated
 | Single characters | Helvetica normal DIN 1451-1E, Font size 8 mm |
| Symbols (037-052) | True Type symbol, Font size 8 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 5 mm | |
| Legends with max. 6 characters in a line | Helvetica condensed DIN 1451-3E, Font size 2,5 mm |
MSM 30 Non-illuminated / Point illuminated
 | Single characters | Helvetica normal DIN 1451-1E, Font size 12 mm |
| Symbols (037-052) | True Type symbol, Font size 12 mm | |
| Legends with max. 3 characters in a line | Helvetica normal DIN 1451-1E, Font size 7 mm | |
| Legends with max. 6 characters in a line | Helvetica condensed DIN 1451-3E, Font size 3,5 mm |
Qualification
Protection aganist external mechanical use
The input systems of the SCHURTER metal line are protected against external mechanical use. The degree of protection is stated in IK values according to DIN EN 50102.
Overview Approvals for MSM / MSM DP / MSM CS
| Electrical Rating of Switch | Micro Switch IP Protection Class | Micro Switch Type | Manufacturer | Testing Laboratory | Licence Number |
| 0,1 A, 30 VDC | IP 40 | SS-01 T | Omron Corporation | VDE / ENEC | 40008425 |
| UL / CSA | E41515 | ||||
| TÜV Rheinland | |||||
| 5 A, 125 VAC / 3 A, 250 VAC | IP 40 | SS-5 T | Omron Corporation | VDE / ENEC | 129246 |
| UL / CSA | E41515 | ||||
| TÜV Rheinland | |||||
| 10 A, 250 VAC | IP 40 | SS-10 T | Omron Corporation | VDE / ENEC | 125256 |
| UL / CSA | E41515 | ||||
| TÜV Rheinland | |||||
| 0,1 A, 30 VDC | IP 40 | 1050.1151 | Marquardt GmbH | VDE, ENEC | 97550 |
| UL / CSA | E41791 | ||||
| 5 A, 125 VAC / 3 A, 250 VAC | IP 40 | 1050.1102 | Marquardt GmbH | VDE, ENEC | 97550 |
| UL / CSA | E41791 | ||||
| 10 A, 250 VAC | IP 40 | 1050.1103 | Marquardt GmbH | VDE, ENEC | 97550 |
| UL / CSA | E41791 | ||||
| 0,1 A, 30 VDC | IP 67 | DC3GL1AA | Cherry GmbH | KEMA, ENEC | 2089323.01 |
| UL / CSA | E23301 | ||||
| 5 A, 125 VAC / 3 A, 250 VAC | IP 67 | DC1GL1AA | Cherry GmbH | KEMA, ENEC | 2089323.01 |
| UL / CSA | E23301 | ||||
| 10 A, 250 VAC | IP 67 | DC2GL1AA | Cherry GmbH | KEMA, ENEC | 2089323.01 |
| UL / CSA | E23301 | ||||
| for all types | DIN EN | 61058-1 | |||
| UL | 1054 |
Overview Approvals for MSM LA
| Number of Poles of Switch | Push Button Switch Type | Manufacturer | Testing Laboratory | Licence Number |
| 1-pole | 1681.1101 | Marquardt GmbH | KEMA | 2106068.01 |
| UL / CSA | E41791 | |||
| 2-pole | 1682.1101 | Marquardt GmbH | KEMA | 2106068.01 |
| UL / CSA | E41791 | |||
| for all types | DIN EN | 61058-1 | ||
| UL | 1054 |
Overview Approvals for PSE NO / PSE IV
| Qualification Test | Approval |
| Thermal Shock | MIL-STD 202F Method 107G |
| High Temperature | MIL-STD 810E Method 501.3 |
| Low Temperature | MIL-STD 810E Method 502.3 |
| Humidity | MIL-STD 810E Method 507.3 |
| Vibration | MIL-STD 202F Method 107G |
| Mechanical Shock | MIL-STD 202F Method 107G |
| RFI | MIL-STD 416D Method RS103 |
| ESD | EN 61000-4-2 |
| Burst | EN 61000-4-4 |
| Surge | EN 61000-4-5 |
Overview Approvals for PSE EX
| Qualification Test | Approval |
| Thermal Shock | MIL-STD 202F Method 107G |
| High Temperature | MIL-STD 810E Method 501.3 |
| Low Temperature | MIL-STD 810E Method 502.3 |
| Humidity | MIL-STD 810E Method 507.3 |
| Vibration | MIL-STD 202F Method 204D |
| Mechanical Shock | MIL-STD 202F Method 213B |
| RFI | MIL-STD 416D Method RS103 |
| ESD | EN 61000-4-2 |
| Burst | EN 61000-4-4 |
| Examination Certificate | Number: TÜV 08 ATEX 554671X Identification: II 2 G Ex ib IIB T4 |
Overview Approvals for PSE HI
| Qualification Test | Approval |
| RFI | MIL-STD 416D Method RS103 |
| ESD | EN 61000-4-2 |
| Burst | EN 61000-4-4 |
Salt Spray Test
according to DIN 50021-SS
(24h, 48h and 96h residence time)
MSM Switches
The surface of the stainless steel material is covered with a molecular-passive layer. Only under very unfavourable conditions it is possible, that iron and rust molecules as well as base metals penetrate the passive layer as foreign substances (pollutions) and initiate the rust process.
The smoothness of the actuator was not affected. After the residence time the tested samples were cleaned under running water and all rust spots could be removed.
MCS Switches
The salt spray test is only valid for the actuating element and not for the complete switch.
- Stainless steel version:
The surface of the stainless steel material is covered with a molecular-passiv layer. Only under very unfavourable conditions, it is possible that iron and rust molecules as well as base metals penetrate the passive layer as foreign substances (pollutions) and initiate the rust process.
The actuation of the switch was not affected. After the residence time the tested samples were cleaned under running water and all rust spots could be removed.
- Zinc die-cast with nickel plating version:
The surface of the zinc die-casting version shows no signs of corrosion.
PSE Switches
After 8h the start of corrosion may be discerned; after 96h this corrosion has spread across large areas of the switch.
This surface corrosion may be removed under running water.
Hygienic Switches for Food Processing Equipment
The PSE switches PSE NO and PSE IV meet the requirements for food processing equipment:
DGUV test certificate FW 11 040
As housing material, stainless steel is recommended for use in food processing equipment.
At the final equipment, the installation position for switches with anodized aluminum housing may not be located above the food area.
Fire Test
Testing on qualification according to DIN EN 81-71 safety measures against vandalism destruction in people- and freight elevators
The switches pass stress class 1 and 2.
Mounting appliance couplers
Different applications require different approaches to the optimal mounting of appliance inlets and outlets, taking into account both minimal dimensions and customer-specific assembly methods, e.g. the module design possibilities that allow electrical testing even before mounting.
Mounting side
Mounting appliance inlets and outlets into front panels is possible both from the front (exterior of the appliance’s mounting board) and from the rear (interior of the appliance’s mounting board) to respond to different customer-specific assembly scenarios.
Usually, the appliance couplers are, together with other control components, mounted (and then wired) from the front into the appliance’s housing. Under certain circumstances it is practical to test the entire electrical unit before mounting. In such cases it is imperative that the appliance coupler be mounted from the rear.
Mounting method
The mounting method describes the procedure of mounting the appliance coupler onto the mounting board.
Snap-in mounting
Snap-in mounting facilitates the insertion of the appliance coupler into the properly prepared panel cutout. Mounting is done by locking snap-in lugs or snap locks (parts of the supplied component) into place. Usually, snap-in mounting is done from the front.
We distinguish between three categories:
One-step snap lock
This snap lock fits perfectly when mounted onto a board with the same thickness as specified in the relevant data sheet.
Incremental snap lock
This snap lock fits perfectly when mounted onto boards with the same respective thicknesses as specified in the data sheet. Hence one product can be used for different housing systems, provided that their panel thicknesses match the snap lock’s specs.
Universal snap lock
Universal snap locks do not require a specific panel thickness. They fit perfectly when mounted onto boards with any thickness within the range specified in the relevant data sheet.
Screw-on mounting
Screw-on mounting is largely independent from panel thickness and ensures better firmness. Mounting can be done both from the front and the rear; however, in contrast to snap-in mounting, this method requires screws and possibly nuts as well (which are not included, unless specified otherwise). For safe mounting, the specified screw tightening torques must be observed, in order to prevent d amaging the component while ensuring secure fastening.
The standard version is mounted using countersunk head screws. Depending on the information in the data sheet, other product types, i.e. with a through hole or flat head machine screws, may be used.
A special type of screw-on mounting appliance coupler comes with the tapped holes for screw-on mounting already in place on the mounting flange, thus reducing the number of components which, in specific cases, may also ensure the product’s tightness to the mounting board (see 5707)
Sandwich mounting
Sandwich mounting makes it possible to mount appliance couplers without the need for additional components. Mounting can be done both from the front and the rear, as specified in the relevant data sheet.
Mounting instructions
Rivet mounting
Rivet mounting is essentially identical to screw-on mounting when using the mounting holes as through holes or using flat head machine screws with the corresponding dimensions as specified in the relevant data sheet.
Mounting position
The mounting position indicates, with regard to the connector pin’s orientation, on what side the mounting elements are, treating snap-in and screw-on positions identically.
Functional Description Piezo Switch NOFunctional Description Piezo Switch NO
The piezo switch is based on the functional principle of the piezoelectric crystal. The action of force on the piezo disc causes a voltage to be induced due to a charge transfer. The voltage generated is converted by the electronic connection into a polarity-neutral, electronic switch contact.
During the voltage drop, the electronic switch contact is closed for the specified pulse duration. After this, the electronic switch contact opens again, even if the force is still present. The period that the electronic switch contact remains closed depends on the actuating speed and force as well as on the duration of actuation.
Diagram of a NO switch:
The piezo disc is connected to the terminals 1 and 2. The electric circuit to be switched is connected at the terminals 3 and 4. This can be either direct voltage (DC) or alternating voltage (AC). If a pulse is applied to the piezo disc, terminal 1 becomes positive in relation to terminal 2 due to the voltage generated. The integrated switching element controls the electric circuit to be switched.
In the neutral position of the piezo switching element, the terminals 3 and 4 are non-conductive, and initial switch resistance is > 10 MOhm. When the piezo disc is actuated, the initial switch resistance is reduced to < 20 Ohm.
When actuating the piezo disc, the resistance between terminals 3 and 4 is therefore changed from high resistance → low resistance → high resistance.
This corresponds in principle to the function of a conventional NO pushbutton switch.
Functional Description Piezo Switches IlluminationFunctional Description Piezo Switches Illumination
Ring Illumination
Single or bi-colored ring illumination is possible for the PSE switches.
When equipped with two colors, it is possible to either switch between the colors or to achieve a combination color, depending on the type of activation.
For example: Diodes of group 1 = red and diodes of group 2 = green
Only group 1 is activated → Ring has red illumination
Only group 2 is activated → Ring has green illumination
Both groups are activated at the same time → Ring has orange illumination
Red cable = Supply voltage: red LEDs
Green cable = Supply voltage: green LEDs
Black cable = Minus for all LEDs
White cable = Switch contact
Terminal layout:
Ring Illumination for M24, M27, M30 series - 12 / 24 VDC
Ring Illumination for M22 series - 12 / 24 VDC with Wires
Ring Illumination for M22 series - 12 / 24 VDC with Plug Connector
Ring Illumination Special Type 5 VDC - on request
Point Illumination
When illuminating the PSE switch, either a single-color LED (2 pins) is used or a bi-colored LED (3 pins). If a single-color LED is used, cable No. 2 is not needed (see terminal layout).
Switching between colors can be achieved by appropriate activation.
Terminal layout:
Point Illumination
Annotation for the Protection of Piezo Switch PSE EXAnnotation for the Protection o Piezo Switch PSE EX
The explosion-proof piezo switch PSE EX has the function of a NO switch (normally open / NO).
The permissible voltage and current of the PSE EX switch are limited, so that the PSE EX is intrinsically safe in accordance with EN60079-11.
The electrical characteristics are listed under Specifications.
The use of the PSE is therefore permitted only in areas where the formation of explosive atmospheres caused by gases, fumes, mist or dust mixing with air occurs occasionally.
The PSE EX has a high degree of security that is also effective at common equipment malfunctions or errors.
The explosion-proof PSE is classified according to EN 60079-0 in the device group II, category 2.
Please note:
- The permissible operating temperature is -20°C to +60°C.
- Operation approval expires on removal of the type label.
- Installation in accordance with IEC / EN 60079-14 and IEC / EN 60079-25.
Connecting technology and switching options
1. Decoder
The metallic panel keypads are designed with an XY matrix. The PC keypads are available with a corresponding keypad decoder and can therefore be used as standard in German, British and U.S. versions. Further country-specific programming can be realised according to customer requirements ex works.
2. Interfaces
Depending on the version, AT PS/2 or USB connections are available as ports with mini-DIN or USB connectors.
3. Connecting technology
Depending on the design, the switches are available with quick connect terminals, flexible wires, pins or clip for pins. Plug-compatible adapters are available for the MCS 19 to achieve rational wiring of components.
4. Switching options
High capacity with the SCHURTER power card: the small design of the piezo switches only allows the switching of small signals or powers in general. With the SCHURTER power card, which is connected directly to the piezo switches, large powers can also be switched. The relays on the SCHURTER power card allow higher voltages, currents and powers to be used and significantly extend the range of applications of the piezo switches.
Increased ease of use is offered for the piezo switches by the prolonged signal version from SCHURTER. Piezo switches usually have a short closing pulse which depends on the activating force, duration and speed. For the piezo switches with prolonged signal, the signal is passed on for the duration in which the switch is pressed (max. 50 seconds).
Protection against pyroelectric effects for the piezo switches with prolonged signal is provided by a specially developed circuit which compensates any pyroelectric effects resulting from the occurrence of large changes in temperature. The switches with integral temperature compensation are of course tested for functional safety by using specific individual tests.
Flexible cords
The power supply cords and the interconnection cords are based on standardized individual components (connectors, power plugs or appliance outlets and various power cord types).
The individual conductors of the flexible cords are, depending on their use in power supply cords and interconnection cords, divided into IEC-compliant nominal current classes and therefore require a length-dependent minimum nominal cross-sectional area (gauge).
type and min. nominal cross-sectional area for flexible cords or cables
| type of connector | types of flexible cords or cable | nominal cross-sectional area (mm2) | |
| 2.5 A | for class-I-equipment | 60227 IEC 52 | 0.75 |
| 2.5 A | for class-II-equipment | 60227 IEC 52 | 0.75* |
| 6 A | 60227 IEC 52 | 0.75 | |
| 10 A | for cold conditions | 60227 IEC 53 or 60245 IEC 53 | 0.75** |
| 10 A | for hot conditions | 60245 IEC 51 or 60245 IEC 53 | 0.75** |
| 10A | for very hot conditions | 60245 IEC 51 or 60245 IEC 53 | 0.75* |
| 16A | for cold conditions | 60227 IEC 53 or 60245 IEC 53 | 1** |
| * if the flexible cord or cable is not longer than 2 m, a nominal cross-sectional area of 0.5 mm2 is admissible. ** if the flexible cord or cable is longer than 2 m, the nominal cross-sectional area for the connectors have to be: - 1 mm2 for connectors 10 A - 1.5 mm2 for connectors 16 A | |||
These cross-sectional areas are likewise subdivided, in compliance with American standards, into classes according to AWG. Hence, cord configurations can be made on the basis of the conductor cross-sectional areas and the AWG classes.
comparison chart metric-AWG wire sizes
| AWG | CSA in mm2 | closest stdd. equivalent in mm2 |
| 30 | 0.0503 | 0.05 |
| 29 | 0.0646 | - |
| 28 | 0.0804 | - |
| 27 | 0.102 | 0.1 |
| 26 | 0.128 | 0.14 |
| 25 | 0.163 | - |
| 24 | 0.205 | 0.2 |
| 23 | 0.259 | 0.25 |
| 22 | 0.325 | - |
| 21 | 0.412 | - |
| 20 | 0.519 | 0.5 |
| 19 | 0.653 | - |
| 18 | 0.823 | 0.75 |
| 17 | 1.04 | 1 |
| 16 | 1.31 | - |
| 15 | 1.65 | 1.5 |
| 14 | 2.08 | - |
| 13 | 2.63 | 2.5 |
| 12 | 3.13 | - |
| 11 | 4.15 | 4 |
| 10 | 5.27 | - |
| 9 | 6.62 | 6 |
| 8 | 8.35 | - |
| 7 | 10.6 | 10 |
| 6 | 13.3 | - |
| 5 | 16.8 | 16 |
| 4 | 21.2 | - |
| 3 | 26.7 | 25 |
| 2 | 33.6 | 35 |
| 1 | 42.4 | - |
| 0 | 53.4 | 50 |
| 2/0 | 67.5 | 70 |
| 3/0 | 85 | 95 |
| 4/0 | 107.2 | 120 |
| 5/0 | 135.1 | 150 |
| 6/0 | 170.3 | 185 |
The various cord types have been internationally harmonized using the following configuration key:
Definition of cord lengths
Definition of cord length for complete power supply cords (plug and connector)
According to EN 60320-1 §21, the lengths of the power supply cord is defined by the visible length of the cord, form the bushing to the bushing. The length SL is a dimension which is necessary for the manufacturing process and results from the length of the cord and its components.
Definition of cord lengths for open-end power supply cords
The length of the open-end cord is defined as the length of the cord from the bushing to the cut (if there are several conductors of different length, the longest individual conductor (ML) is used for establishing the length of the cord). The lenght SL is a dimension which is necessary for the manufactoring process and results from the lenght of the cord and its components. In order to properly treat the open end, we need the following information from you:
•␉Sheath stripping length ML (i.e. length of the longest individual conductor)
•␉Stripping length (AL1 ...)
•␉Conductor stripping length (IL1 ...)
Treatment of conductor ends (if any) (e.g. tinned, conductor end bushings, flat pin bushings, ring tongue...)
(When simply stripping the conductor, the stripped insulation is usually left on the conductor in order to keep the stranded wire from becoming frayed.)
Stockpiling and manufacturing reasons, the cord length per injection-molded power plug or connector may vary by +/- 60mm.
Product standard / Comments on definitions used / CE Marking / Conformity to component standards / National approvals / Protection
Conformity to component standards, national approvals
National testing institutions are testing according to national and international standards or other generally recognized rules of technology. Their certification/approval-marks confirm the observance of the safety requirements which electric appliances must fulfil.
 | Electrical Certification | ||
 | VDE | Verband Deutscher Elektrotechniker | |
 | (Certificate of conformity with factory surveillance) | VDE | Verband Deutscher Elektrotechniker |
 | UMF | ||
 | (Recognition) | UL | Underwriters' Laboratories (USA, Canada) |
 | 1) only for 3pole | UL | Underwriters' Laboratories (USA, Canada) |
 | (Recognition) | UL | Underwriters' Laboratories (USA) |
 | 1) only for 3pole | UL | Underwriters' Laboratories (USA, Canada) |
 | CSA | Canadian Standard Association, Component Acceptance Service | |
 | CSA | Canadian Standard Association | |
 | CCC | Chinese Compulsory Certification | |
 | CQC | Chinese Quality Certification (voluntary) | |
 | PSE | Japan Electrical Safety and Environment technology Laboratories | |
 | KTL | Korea Testing Laboratory | |
 | TÜV | Technischer Überwachungsverein | |
 | NF | Norme française | |
 | SEV | Schweizerischer Elektrotechnischer Verein | |
 | SEMKO | Svenska Elektriska Materielkontrollanstalten | |
 | FIMKO | Finnish Electrical Inspectorate | |
 | KEMA | Keuring van Elektrotechnische Materialien | |
 | IMQ | Instituto italiano del marchio di qualità |
Comments on definitions used
Please be aware that the specifications nominal value used in the German part of the Schurter catalogue and the data sheets, is synonymous with rated value.
The difference between these two values is a pure matter of definition. In order to avoid any unnecessary complications we will continue to use the specifications nominal value.
National approvals
In addition to the combined UL/CSA approvals, most of the SCHURTER components are also approved by one of the European certification bodies like VDE (Germany), Electrosuisse (Switzerland) or SEMKO (Sweden). The safety testing of all these European certification bodies are based on the commen European safety standards. With the harmonisation effort in Europe, the different national European certification bodies have lost their importance and SCHURTER has decided to maintain only one European approval (e.g. VDE, SEV or SEMKO) in future. The others will not be renewed once they have expired.
Because UL and CSA are not members of the CENELEC, the standards of UL and CSA are not harmonised yet with the European standards. However, UL and CSA are trying to harmonize their standards with each other. Where possible, SCHURTER will apply for the combined cULus or cURus approval.
Further to development in Asia, SCHURTER has obtained national approvals from China, Japan and Korea.
Information about approvals
SCHURTER products are certified according to EN / IEC standards and carry country specific approvals in Europe.
During the last few years European countries made much effort to reduce their approval marks to one generally accepted mark. The ENEC approval mark replaces (wherever possible) the previous approval mark. The ENEC mark is offered by all national certification bodies that signed for the European certification agreement (CCA)*.
SCHURTER decided to reduce the variety of European approval marks. For new approbations of SCHURTER parts only the ENEC will be mentioned in the future:
Approvals for the US and Canada are according to the UL and CSA standards:
As UL and CSA are not a member of CENELEC these two are not according to the European approval marks. Wherever possible SCHURTER want to acquire the combined cULus approval mark:
Since Aug. 1st. 2003 the Chinese approval mark is required for a lot of products to import to China. SCHURTER strives to get the approvals for the concerned products.
SCHURTER will check if a voluntary CQC registration can be done when a product does not apply with a Chinese standard.
Further information: http://www.enec.com
Approval Industry Links
* members of ENEC agreement:
| Reference | Key | Country |
| 01 | IMQ | Italy |
| 02 | KEMA | Netherlands |
| 03 | VDE | Germany |
| 04 | SEV | Switzerland |
| 05 | SEMKO | Sweden |
Protection against electric shock
1. Protection against direct and indirect contact – general terms
The protection against electric shock on electric equipment as well as their components are divided into the following parts:
•␉Protection against direct contact with live parts concerns all measures for the protection of human beings and animals against hazards which result from direct contact with live parts of electric equipment and their components.
•␉Protection against indirect contact is the protection of human beings and animals against hazards which result from contact of live parts 1) of electric equipment as well as components thereof, which have become live due to an insulation failure.1)
1) Accessible, conductive part, which is not conductive normally but which may be conductive due to a failure.1)
2. Protection against direct contact with live parts e.g. of a fuseholder.
The data sheets of the relevant components inform about the taken measures.
3. Protection against indirect contact
Measures for the protection against indirect contact on electrical equipment are defined according to IEC 61140 by the 4 protection classes 0, I, II, III. Each protection class includes two protection measures. Even if one of these measures should fail, no electric shocks will occur.
| Protection class | Main protective measures |
| 0 | 1. Basic insulation between live parts and accessible conductive parts. 2. Earth-free location, non-conducting environment. |
I | 1. Basic insulation between live parts and accessible conductive parts. 2. Means are provided for the connection of accessible conductive parts of the equipment to the protective (earthing) conductor in the fixed wiring of the installation in such a way that accessible conductive parts cannot become live in the event of a failure of the basic insulation. |
II | 1. Basic insulation between live parts and accessible conductive parts. 2. Additional insulation. Basic and supplementary insulation are summarised under the term “double insulation”. Under certain circumstances also a “reinforced insulation» (single insulation system) may guarantee an equivalent protection against electric shock as a “double-insulation” does. No terminal for a protective conductor is allowable. A possibly existing protective conductor must not be connected and has to be insulated like any live part. |
III | 1. Functional insulation. 2. Supply at safety extra-low voltage SELV (the circuit is isolated from the mains supply by such means as a safety isolating transformer). The protection against electric shock is in this case completely based on the supplying by SELV-circuits (U ≤ 42 V). Higher voltages are not generated in the equipment. No terminal for a protective conductor is allowable. |
PTC Circuit Protection
Introduciton PTC-circuit protection
When it comes to Polymeric Positive Temperature Coefficient (PPTC) circuit protection, you now have a choice. If you need a reliable source, look to SCHURTER resettable overcurrent protectors.
SCHURTER’S PTC products are made from a conductive plastic formed into thin sheets, with electrodes attached to either side. The conductive plastic is manufactured from a nonconductive crystalline polymer and a highly conductive carbon black. The electrodes ensure even distribution of power through the device, and provide a surface for leads to be attached or for custom mounting.
The phenomenon that allows conductive plastic materials to be used for resettable overcurrent protection devices is that they exhibit a very large non-linear Positive Temperature Coefficient (PTC) effect when heated. PTC is a characteristic that many materials exhibit whereby resistance increases with temperature. What makes the SCHURTER PTC conductive plastic material unique is the magnitude of its resistance increase. At a specific transition temperature, the increase in resistance is so great that it is typically expressed on a log scale.
Mode of operation
The conductive carbon black filler material in the PTC fuse device is dispersed in a polymer that has a crystalline structure. The crystalline structure densely packs the carbon particles into its crystalline boundary so they are close enough together to allow current to flow through the polymer insulator via these carbon “chains”.
When the conductive plastic material is at normal room temperature, there are numerous carbon chains forming conductive paths through the material.
Under fault conditions, excessive current flows through the PTC fuse device. I2R heating causes the conductive plastic material's temperature to rise. As this self heating continues, the material's temperature continues to rise until it exceeds its phase transformation temperature.
As the material passes through this phase transformation temperature, the densely packed crystalline polymer matrix changes to an amorphous structure. This phase change is accompanied by a small expansion. As the conductive particles move apart from each other, most of them no longer conduct current and the resistance of the device increases sharply.
The material will stay “hot", remaining in this high resistance state as long as the power is applied. The device will remain latched, providing continuous protection, until the fault is cleared and the power is removed. Reversing the phase transformation allows the carbon chains to re-form as the polymer re-crystallizes. The resistance quickly returns to its original value.
Product selection
To select the correct SCHURTER PTC circuit protection device, complete the information listed below for the application and then refer to the resettable overcurrent protector data sheets.
1. Determine the normal operating current:
␉______ amps
2. Determine the maximum circuit voltage
␉(Vmax): ______ voltsmax
3. Determine the fault current (Imax):max
␉______ amps
4. Determine the operating temperature range:
␉Minimum temperature: ______ °C
␉Maximum temperature: ______ °C
5. Select a product family so that the maximum rating for Vmax and Imax is higher than the maximum circuit voltage and fault current in the application.maxmax
6. Using the Ihold vs. temperature table on the product family data sheet, select the SCHURTER PTC device at the maximum operating temperature with an Ihold greater than or equal to the normal operating current.holdhold
7. Verify that the selected device will trip under fault conditions by checking in the Itrip table that the fault current is greater than Itrip for the selected device, at the lowest operating temperature.triptrip
8. Order samples and test in application.
Applications
The benefits of SCHURTER resettable overcurrent protectors are being recognized by more and more design engineers and new applications are being discovered every day.
The use of polymeric fuses has been widely accepted in the following applications and industries:
• Personal computers
• Laptop computers
• Personal digital assistants
• Transformers
• Small and medium electric motor
• Audio equipment and speakers
• Test and measurement equipment
• Security and fire alarm systems
• Medical electronic
• Personal care products
• Point-of-sale equipment
• Industrial controls
• Automotive electronics and harness protection
• Marine electronic
• Battery-operated toys
• Telecom electronics
Pulse transformers
Introduction
The application range of pulse transformers is very broad. In most cases, a signal or a control pulse must be transmitted between electrically isolated circuits. This problem exists in the activation of thyristors and triacs, or in the operation of FETs or IGBTs in highpower switching circuits. Another application involves electrical isolation in telephone switchboards and data transfer systems.
High insulation rating
When used in power electronics, the secondary side of pulse transformers is normally at a high voltage potential. This requires a high insulation strength for pulse transformers.
Complying with VDE 110 b, Part 1, the following test voltages between the primary and the secondary circuits are required for transformers of protection class I and choke coils, as a function of the working voltage:
| Working Voltage | Test Voltage Uisol |
| [V] | [V] |
| 250 | 1500 |
| 500 | 2500 |
| 1000 | 3000 |
Test voltage Uisolisol
The test voltage for SCHURTER pulse transformers depend on the type of winding and coating on the coil wire. Exact information concerning each type is available in the technical specifications. The test voltage is in each case considerably higher than that prescribed by VDE 110 b.
Partial discharge voltage Uee
Partial discharges during normal operation have little effect on the operation of the circuit, but can accelerate the ageing of the pulse transformer. The glow discharge and the intermittent voltages are at least 50% higher than the approved working voltages for all SCHURTER pulse transformers. This provides the best assurance against long-term damage.
Definition of the rise time Trr
Over the almost straight-line in the lower 2/3 of the rise curve, i.e. in the area where the semiconductor is triggered with certainty, we draw a line and measure the time from 10% to 90% of the overall pulse height.
The measurement is made with the following circuit. The load resistance RL is given for each type.
For a turn ratio of 1:1, the test voltage is 10V;
For a turn ratio of 2:1, the test voltage is 20V, and so on.
Trigger current Iignign
The maximum trigger current is a guide value. For a given current, the drop in voltage over the secondary winding resistance is smaller than one volt.
The voltage-time integral Us • twsw
The voltage-time integral is the product of the pulse height and width, measured at half pulse height. The voltage-time area is measured on the secondary side during operation under no load.
The voltage-time integral Us • Tw is measured according to the principle of the following circuit. The same voltages as used for measuring the rise time are used.
Primary and secondary inductances Lp, Lsps
Primary and secondary inductances are measured with a low-power signal of 0.1 mA/10 kHz at 25°C. The tolerance is -30% / +50%. The measured value can also vary up to ± 25% under temperature variation in the range 0°C to 70°C.
Coupling capacity Ccc
The coupling capacity is measured between the primary and one secondary winding. This value varies depending on the type of winding. Bifilar windings, designed for models with faster rise times, have higher coupling capacitances than the layer or selection windings.
In general, this value is not important with regards transmission properties. To guarantee effective interference protection from the control electronics, however, the smallest possible coupling capacity is desired.
Turn ratio N
In the given turn ratios, the first figure always refers to the primary winding. Hence a «1:1» pulse transformer has the same number of winding on both the primary and the secondary windings. The turn ratio «3:1:1» stands for one primary and two secondary windings with a transformation ratio of three to one between the primary and the secondary windings.
SCHURTER offers pulse transformers with other turn ratios than specified on the data sheets upon request.
Example of application
Power transistor in pulse operation
General information
UL approbation
The plastic cases and the potting resin of all SCHURTER pulse transformers are fire resistant in compliance with UL 94 V-0.
Abbreviations used in the technical data
| ∫Udt | Voltage-time integral (Us•Tw) |
| Tr | Pulse rise time |
| Pm | Power dissipation at ambient 50°C |
| P | Power dissipation at elevated temperature |
| ϑa | Ambient temperature |
| Iign | Trigger current |
| Cc | Coupling capacity |
| RL | Test load resistance (secondary) |
| Rp | Primary resistance |
| Rs | Secondary resistance |
| Lp | Primary inductance = Ls x N2 |
| Ls | Secondary inductance |
| Ueff | Working voltage primary-secondary in VRMS |
| Uisol | Test voltage |
| N | Turns ratio |
Code
I1) T2) N3) F4) - 05) 26) 357) - D18) 039)
1)␉Pulse transf.1)
2) ␉T.. conventional 2)
␉S.. SMD
3)␉N.. normal 3)
␉R.. small rise time
4)␉A.. 1:1 / B.. 2:1/C.. 3:1 4)
␉F.. 1:1:1 / H.. 3:1:1
5)␉Brandlabel SCHURTER5)
6)␉CK:1..≤10pF / 2..>10..≤100pF6)K
7)␉Case code7)
8)␉Trigger current8)
9)␉Inductance9)
Pullout prevention on pluggable power supplies
To avoid the danger of accidentally unplugging a power cable from the device, several various types of pullout preventers are offered.
V-Lock locking system for the IEC-appliance couplers
The V-Lock locking system can be used for 10 A and 16 A power inlets and connectors according to IEC 60320. This system works in such a way that there is a pin in the socket, interlocking with a notch in the plug and thus prevents an unintentional pullout of the power cable.
The locking is released by pressing on the releasing lever. This lever is easily detected by its bright yellow colour and thus distinguishes this system from existing power cable connections.
V-Lock pullout prevention system prevents accidentally pulling out power cables in a simple manner
Plug connection with retaining clip
Another type of pullout prevention on pluggable power supplies are retaining clips, which are mounted to the device plug and are pressed over the cord connector. Regardless of device plug type and the multitude of electrical sockets shapes, the correct selection of retaining clip must be made. This retaining clip system ensures that the plug is correct, i.e. adequately deep, inserted to avoid the danger of accidentally unplugging a power cable from the device.
IP protection to the device including power supply protection
A special sealing kit increases the IP protection to the device including the protection of the plug connection. This additional safeguard assures a certain protection against the unwanted entry of moisture and dust when working with power cables that are plugged in. The power supply seal is produced with an inlet gasket around the plug pin. When plugged into a cable socket, the seal prevents liquids and dust on the plug pins from reaching live parts, as well as from ending up in the socket.
The device plug with inlet gasket is approved by IEC and UL. To be sure that the cord connector really is properly and completely plugged in, and to additionally protect the connection from accidentally being unplugged, device plugs should be equipped with a pullout preventer. Only in this way can an IP-protected connection be secured, regardless of operating conditions.
Plug connection with retaining clip and additional sealing kit
Soldering Profile
SCHURTER components for printed circuit boards are suitable for common solder processes. THT components can be wave soldered with a peak temperature of 230 to 260°C. SMD components are suitable for reflow soldering with a peak temperature of 260°C.
Please note the soldering specification on the product data sheet.
Recommended Wave Soldering Profile
The solder temperature 230°C – 260°c depends on the solder classification of the components.
Recomended Reflow Soldering Profile
Soldering Profile
| Reflow feature | Pb-Free assembly | |
| Preheat | Temperature Min (Ts min) | 150°C |
| Temperature Max (Ts max) | 200°C | |
| Time (ts) for (Ts min to Ts max) | 60 - 120 secs | |
| Ramp-up rate (TL to Tp) | 3°C / secs max. | |
| Liquidous temperature (TL) | 217°C | |
| Time (tL) maintained above (TL) | 60 - 150 secs | |
| Time (tP) below 5°C of max. peak temperature | 30 secs max. | |
| Ramp-down rate (TP to TL) | 6°C / secs max. | |
| Time 25°C to peak temperature | 8 mins max. | |
| Peak temperature maximum | 260°C | |
| * The peak temperature depends also on the component volume (see JEDEC J-STD-020D) | ||
Customer specific connectors
The SCHURTER power mains plugs, power interconnection plugs, and cord connectors displayed in this catalog are designed and manufactured in accordance with national and international standards. These standard have been published to create a worldwide understanding about basic dimensions and safety targets of coupler systems. This way a high degree of compatibility of components of different origins has been achived.
Power mains plugs are designed to the relevant national standards whereas appliance couplers meet the standards as followes: DIN VDE 0625, EN 60320, IEC320 „Appliance couplers for household and similar general purposes, Part 2: interconnection couplers for household and similar equipment“.
For different reasons you might consider or be forced to use a coupler system on your application that does not mate or interchange with standardized couplers:
•␉The applicable standard for your appliance defines a certain coupleer system or provides a certain restriction concerning couplers that can be used. For example IEC335-1 „Safety of household and similar electrical appliances, Part 1: General requirements“ states in §24.5:applicable standard for your appliance defines a certain coupleer system or provides a certain restriction concerning couplers that can be used
␉„Plugs and socket-outlets and other connecting devices on flexible cord, used for an intermediate connection between different parts of an appliance, shall not be interchangeable (...) with connectors and appliance inlets complying with the standard sheets of IEC 60320, if direct supply of these parts from the mains could cause danger to persons or surroundings, or danger to the appliance“.
•␉For marketing reasons it might be desirable to use a unique and non-interchangeable coupler system for your appliance or appliance family.use a unique and non-interchangeable coupler system for your appliance or appliance family
Down-sizing of housing is an aspect that is ever more important for design of new appliances. You might consider a modification of standard or non-standard coupler systems that perfectly adapts your mounting requirements. The broad range of SCHURTER‘s standardized interconnection plugs and connectors is constantly being extended by new variations. When it comes to a special cord end terminations a high number of variations is available.
All SCHURTER standard and non-standard coupler systems meet the relevant requirements of product safety proved by multiple approval markings of international testing agencies.
Chokes
RF suppression chokes conforming to IEC60938
All SCHURTER filters are fitted with chokes which satisfy the guidelines set down by international and national standards organizations.
The most important test data for RF suppression chokes are:
Maximum variation
of –30% / +50% for compensated
inductance: –15% / +15% for linear and storage
Testfrequency 1MHz ± 20% at L 10 μH
␉100kHz ± 20% at 10 μH < L 1 mH
␉10kHz ± 20% at 1 mH < L 50 mH
␉50 to 120 Hz ± 20% at L > 50 mH
Testcurrent: 0.1 mA
Testtemperature: 25°C ± 3°C
Insulation resistance Ris: 6000 MΩ
Test voltages
| Chokes for | Between connections | Inner and outer insulation |
| AC | 4.3 URVDC | 2 UR + 1500 VAC, but at least 2000 VAC |
| DC | 3 UR VDC | 2 UR + 1500 VDC |
Temperature rise at nominal current: ΔT = 60°C
Short-circuit strength:
EN and VDE: not applicable
SEV→: 25 x IN (2 half-waves)
Current compensated chokes in interference suppression filters
The main type of choke used in suppression filter engineering is the current compensated choke. This mainly damps the common mode interference. The differential mode parasitic current, or rather the magnetic flux they produce in the core, is compensated by means of a special type of winding. The relatively small attenuation of the differential mode parasitic currents can be balanced through the large, symmetrically connected capacitance Cx between the lines. Only the leakage inductance Ls of the choke is then of any importance.
The high nominal inductance LN active for common mode parasitic currents allows the insertion of small, earthed capacitances CY in a filter circuit. These capacitances are regulated by international standards for leakage currents.
RF suppression capacitors: General information
All SCHURTER filters are fitted with class X or Y RF suppression capacitors in accordance with international standards (IEC, EN). These are mainly self-healing metallized paper, polyester or polypropylene types, tested against the standards of major countries around the world and approved as noise suppression capacitors. Class X capacitors are capacitors with unlimited capacity for those applications in which a failure caused by a short circuit cannot result in a dangerous electrical shock. Class Y capacitors are capacitors intended for an operating voltage Ueff = 250 V with increased electrical and mechanical safety and limited capacitance.
RF Suppression capacitor complying with IEC 60384-14
All SCHURTER filters are equipped with components which have been tested and approved as RF suppression capacitors.
The most important test data for RF suppression capacitors are:
Capacitance Cx, Cy ± 20% for fM = 1 kHz
Insulation resistance Ris between the capacitor terminals:
for C > 0.33 μF: Ris x C > 2000 s (time constant)
for C 0.33 μF: Ris > 6000 MOhm
Major voltage test and standards for CX and CY capacitors
| Country | Standard | C | Rigidity | Pulse Test 1.2/50 μs |
| Europe | IEC 60384-14 | X1 | 4.3 UR VAC | 4.0 kV |
| X2 | 4.3 UR VAC | 2.5 kV | ||
| Y1 | 4.0 kVAC | 8.0 kV | ||
| Y2 | 2.5 kVAC | 5.0 kV | ||
| IEC 60950 | X1 | 2700 VDC, 60s | 4.0 kV | |
| (Equipment Standard) | X2 | 2121 VDC, 60s | 2.5 kV | |
| USA | UL 1414 | 2121 VDC, 60s | 50 Pulse, 10 kV, 1000 W | |
| UL 1283 | 2121 VDC, 60s 2545 VDC, 1s | - | ||
| Switzerland | SEV 1055 | x | 4.3 UR VAC | 3.0 kV |
| y | 2(100 + 2 UR) min. 2250 VAC | 5.0 kV |
X2Y® filter®
X2Y® filter combines the X and Y capacitors into a component that is in contact with the filter enclosure over a broad surface. The leads connecting the capacitors are thereby eliminated and parasitic impedances are reduced to a minimum. This results in broadband suppression into high frequency ranges.
Overcurrent protection
General information circuit breakers
Fig. 1 Thermischer CBE
Fig. 2 Contact force versus deflection
1) Latch-type mechanism
2) Spring-type mechanism
Circuit breakers for equipment, CBEs, provide protection against hazards of electricity in equipment. For the TA45-line «Protection» includes the safeguarding against harmful thermal effects of overcurrents and the prevention of accidents caused by electricity.
Overcurrent protection is achieved by the automatic interruption of sustained overcurrents with the help of a thermal release tripping the CBE when the duration of an overcurrent exceeds a predetermined limit. The essential part of such a release is a thermo bimetal (figure 1, figure 6a). This mechanical element can simulate the heating effect of the current, can transform electric energy into a motion (deflection) and trigger a mechanism to cause automatic interruption of the current which produces these effects.
To use the heat created by the current instead of the magnitude of the current itself offers a great advantage, because heat determines the admissible stress of the insulation and the admissible duration of the various overload conditions encountered in practical applications. Thermally operated CBEs, therefore, take good care of the surplus energy required for start-up or high-torque operation of motors. They cope well with high inrush spikes which occur in switching power supplies, transformers, tungsten filament lamps, etc. and avoid nuisance tripping due to such transients.
Bimetals can also handle frequencies in a fairly wide range, e.g. from DC to 400 Hz, without necessitating any change in ratings or characteristics. The CBEs of the TA45-line use a «latch-type» thermal release. High contact force can be maintained until the unit trips. This prevents electrical «noise» due to contact bounce and reduces the risk of contact welding which may occur with spring type mechanisms (figure 2).
Thermally operated CBEs are temperature sensitive. This, in most applications, is an advantage because the withstand capacity of the component to be protected is almost always temperature sensitive too.
Overcurrent protection by thermal magnetic CBEs
Thermal magnetic CBEs have two releases to achieve automatic interruption of an overcurrent (figure 7):
1) A thermo-bimetal for overload current
2) An electro magnet for short circuit current
Consequently, the operating characteristic is essentially composed of two zones, linked by a zone (3) where either one or the other mode of tripping will be effective (figure 8).
The electro magnet should be dimensioned so that it will not trip during transients likely to occur in the intended application. This determines the level of the current below which instantaneous tripping should not occur.
The upper level, indicating the current above which instantaneous tripping must occur, is of interest in considerations concerning the selective action of two protective devices.
In the short circuit range of overcurrents (above 8....12 times the rated current), the faster interruption obtainable with the magnetic release is an advantage. It can help to save the heater windings of indirectly heated bimetals from overheating and it can improve the breaking capacity of the CBE. The CBEs primarily intended for overload protection are usually capable of interrupting, without back-up assistance, currents up to 100 to 300 amps and be fit for further use after such an interruption. The performance at higher fault levels usually relies on back-up assistance by fuses or breakers.
Fig. 7 Thermal-magnetic CBE
1) Thermo-bimetal
2) Electro magnet
Fig. 8 Tripping zones of thermal magnetic CBEs
1) Thermal mode of tripping
2) Magnetic mode of tripping
3) Either thermal or magnetic mode
Prevention of accidents
The prevention of accidents can be achieved in several ways. To safeguard persons from the possible risks of injuries arising from an unexpected restarting of an electric motor when the voltage recovers after a power failure, undervoltage releases can be fitted to the basic CBE. This release will trip the CBE when the voltage drops below a certain level. The restarting requires a manual ON operation.
Fig. 3 Undervoltage release
Fig. 4 Mechanical lock-out latch
Undervoltage releases can be combined with overcurrent releases in one integral unit. The TA45-line utilizes a special version of an undervoltage release as illustrated by figure 3. It differs from the conventional version by using an additional latch, reducing the anlatching force significantly. The release can thus be operated with far less power and utilize rectified AC to avoid any humm while the CBE is in the ON position. The wiring diagram is shown by figure 6b. Typical examples for the use of undervoltage releases are floor cleaning machines, high pressure cleaning equipment etc.
To prevent injuries caused by dangerously exposed moving parts of a machine, a mechanical lock-out latch can be fitted to the basic CBE. A spring loaded pin will cause the CBE to trip when a protective cover is removed from dangerous parts, like the cutting knifes of a shredder. The CBE can not be switched ON as long as the protective cover is not in its place. Figure 4 shows the operating principle. Figure 6c shows the wiring diagram.
Protection may also be necessary when at a remote location a dangerous situation occurs which could escalate if the CBE did not interrupt the current. To avoid such a risk, a remote trip release ca be fitted to the basic CBE to achieve tripping on sensor command. The operating principle is shown by figure 5, the working diagram by figure 6d.
Fig. 5 Remote trip release
The various possibilities of combining different protective functions is also reflected by the wiring diagrams as shown in figure 6.
• Fig. 6a shows the wiring diagram fo the basic CBE, with one protected pole. The TA45 can be outfitted with two protected poles for additional safety against faults to earth.
• Fig. 6e shows the more complex diagram, utilizing a shunt connection (P1-5) and a change over auxiliary contact.
• The wiring diagrams for CBEs with an undervoltage release, a mechanical lock-out latch and a remote trip release are shown by 6b, d, and c.
CBEs of the TA45-line are available with rocker or push button actuators and protective covers to obtain the desired degree of protection.
Advantages
The strong points of the TA45-line are:
• Thermal overload protection
• Undervoltage release
• Remote trip release
• Mechanical lock-out latch
• 3 pole version
• Rocker actuation
• Push button actuation
• Auxiliary contact.
• Shunt terminal
Special features:
• Good simulation of the thermal behaviour of the protected component
• Capability of coping with start-up and inrush currents
• Suitability for a wide range of frequencies
• Simplicity / reliability
• Favourable price
• Approvals
Introduction
Telecommunication equipments serve for data exchange between a variety of subscribers. Communication takes place in various ways, e. g. per telephone, FAX etc.
This gives rise to the following classical network topology:
There can be extremely diverse distances between individual subscribers (man, machine). This means that network connections (overhead lines, signal cables) can be subject to various interference sources.
• Atmospheric interference, (lightning discharge, switching operations)
• Interference by power induction (equalizing currents, vicinity of power cables)
• Direct contact with energy network (short-circuits)
Interference sources
Atmospheric interference (Lightning Surge)
Interference through atmospheric discharge is very frequent. Occurring voltages are of the order of 100 kV with discharge currents up to 150 kA. Effects due to direct lightning stroke are principally to be expected on exposed signal lines (overhead lines).
Interference by induction (Power Induction)
Induction voltages occurring as interference on telecom lines are usually a result of circulating or equalizing currents in the earth or are produced by strong currents in adjacent power cables.
Direct contact with the power network (Power Contact)
The highest intensity and usually long duration influence on a telephone line (a few seconds to several minutes) is by direct contact with the power network, e.g. short-circuit with an adjacent power cable.
Protection equipment
Regardless of which interference acts on the telecom equipment, it must be guaranteed at all times that no damage occurs, or only limited damage whose effects can be calculated.
As shown below, this requirement can be satsified by the use of appropriate protection circuits.
Protection circuits in the telecom branch are usually designed on the two-stage principle. They comprise a primary and secondary protection.
Primary protection
Primary protection frequently comprises a combination of resistors and surge arrestors and is usually located at the «building entry» interface.
The task of the illustrated primary protection circuit is to sufficiently reduce the high-energy interference distortion so that they can be safely absorbed by the following secondary protection.
The secondary protection
The secondary protection is normally located directly at the appliance entry of the telecom equipment and has two objectives.
1. It operates as a voltage limiter which ensures that interference up to a defined amplitude, not yet capable of activating the primary protection, is absorbed or reduced to a level harmless for the telecom equipment.
2. It effectively suppresses high energy level interferences, which can no longer be adequately absorbed by the primary protection (e.g. in case of direct contact between the signal lines and the power network), by galvanic decoupling of the circuit. This prevents the occurrence of serious damage, even fire, in the telecom equipment.
The following schematic diagram shows a frequently used and extremely reliable protection circuit for this purpose. The circuit, which in its simplest form comprises two fuse-links and two varistors, is characterised by an extremely attractive cost-benefit ratio. The varistors limit the interference voltage peaks to a level compatible for the telephone exchange, respectively subscriber circuit. Under these normal conditions, the fuse-links remain intact.
Under worst-case conditions, e.g. direct contact with the power network, where both the telecom equipment components and the varistors in the protection circuit would be seriously damaged or destroyed, the fuse-links interrupt the circuit, thus effectively and reliably protecting the telecom equipment.
Standards, introduction
Several standards have been established for the telecom application field, all of which are aimed at combining the interference influences, lightning surge, power induction, power contact, previously described under the title “Application Note” together with the associated safety aspects, and to derive suitable testing methods for the components in question.
Various kinds of loads have been defined and standardised as testing criteria. They can be simulated with the aid of an appropriate test circuit. This provides circuit designers with the facility for optimally adapting the stages of a protection circuit to one another.
The presently relevant standards are:
ITU-T K.20 International Telecommunication Union
UL 60950 UL Standard for Safety for Information
Technology Equipment
IEC 60950 IEC Standard for Safety for Information
Technology Equipment
Telcordia GR-1089 Telcordia Technologies
TIA-968-A Telecommunications Industry Association
(The list is not exhaustive)
Tests:
SCHURTER fuselinks have been tested according to the following standards and testing criteria:
Standards
1. ITU-T K.20
Lightning surge: Test circuit
Test:
1. The pulse amplitude (generator no-load) is set to 1000 V and the pulse shape to 10 μs / 700 μs.
2. The pulse current Ipuls is set to the value Ipuls max. stated in the
3. Test mode : 10 single pulses, at an interval of 60 sec. alternating polarity.
Requirement: The fuse shall not interrupt the circuit.
Note:
With a charge voltage of UC = 1000 V, the standardized pulse generator in Para. 1 supplies a maximum pulse current Ipuls = 67 A, providing the current limiting resistor is RD = 0Ω. The shunt RM for the current monitoring has a very low resistance and has therfore no notable influence to the current amplitude. This means that the data sheet current 67 A does not represent the maximum permissible pulse amplitude of the fuselink in question, but the maximum current amplitude which can be supplied by the pulse generator. If a max. current higher than 67 A is to be expected in a circuit, the I2t-values of the fuse-link can be calculated using the formula I2t = 0.72 x I2peak x t2, as a good approximation in order that the selected fuse-link can accept the expected current pulse without interrupting the circuit.
Powerinduction: Test circuit
Test: The fuse-link in the test circuit AC 300 V / 50 Hz is loaded 5 times with Ieff = 0.5 A for 200 ms at intervals of 60 sec.
Requirement: The fuse-link shall not interrupt the circuit.
Power contact: Test circuit
Test: The fuselink in the test circuit AC 250 V / 50 Hz is loaded with the current value ISC stated in the data sheet. The supply voltage is maintained for 15 minutes.
Requirement: The fuse-link shall interrupt the circuit.
2. UL 60950/IEC 60950
Test circuit
Test 1
The fuse-link in the test current circuit is loaded with a test current of ISC = 40 A .
The AC 600 V / 50 Hz source voltage is applied for a total of 1.5 sec.
Requirement: The fuse-link shall interrupt the circuit.
Test 2
The fuse-link in the test current circuit is loaded with a test current of ISC = 7 A .
The AC 600 V / 50 Hz source voltage is applied for a total of 5 sec.
Requirement: The fuse-link shall interrupt the circuit.
Test 3
The fuse-link in the test current circuit is loaded with a test current of ISC = 2.2 A .
The AC 600 V / 50Hz source voltage is applied for at least 30 minutes, or until stable thermal conditions are achieved in the telecom unit or until the fuse-link interrupts the circuit. This test is performed together with the equipment in which the fuse-link is installed.
3. Telcordia GR-1089
3.1 Lightning surge
Test circuit
Test:
1. The pulse amplitude (generator no-load) is set to 1000 V and the pulse shape to 10 μs / 1000 μs.
2. The pulse current Ipuls is set to the value Ipuls max. stated in the data sheet with limiting resistor RD.puls
3. Test mode: 50 single pulses, at an interval of 60 sec. alternating polarity.
Requirement: The fuse shall not interrupt the circuit.Requirement: The fuse shall not interrupt the circuit.
Note: With a charge voltage of UC = 1000 V, the standardized pulse generator in Para. 3.1 supplies a maximum pulse current Ipuls = 14 A, providing the current limiting resistor is RD = 0Ω . The shunt RM for the current monitoring has a very low resistance and has no notable influence to the current amplitude. This means that the data sheet current 14 A does not represent the maximum permissible pulse amplitude of the fuse-link in question, but the maximum current amplitude which can be supplied by the pulse generator. If a max. current higher than 14 A is to be expected in a circuit, the I2t- values of the fuse-link can be calculated using the formula I2t =0.72 x I2peak x t2, as a good approximation in order that the selected fuse-link can accept the expected current pulse without interrupting the circuit.
3.2 Power cross
Test circuit
see UL 60950/IEC 60950
Test 2, Second Level (only TF 600)
The fuse-link in the test current circuit is loaded with a test current of ISC = 60 A .
The AC 600 V / 50 Hz source voltage is applied for a total of 5 sec.
Requirement: The fuse-link shall interrupt the circuit.
Explanation of IEC 60320 connector terms
The illustration below shows a possible component configuration, properly naming the various components which will be explained in detail further down, including the distinguishing characteristics.
Appliance coupler
Appliance coupler means devices for connecting a flexible power cord to an appliance or another installation. You will find a product overview under ‘ ’. Appliance couplers essentially comprise the following components:
•␉Connector
•␉Appliance Inlet
Interconnection cords
Interconnection cords means structural units consisting of a flexible cord fitted with a plug and a connector built for interconnecting or disconnecting any appliance or installation with/from any other appliance or installation by means of a power cord. You will find a product overview under ‘ ’.
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Rewireable plug and connectors
Rewireable plugs and connectors means structural units built to allow the flexible cord to be exchanged/replaced, colloquially referred to as ‘cord plugs/connectors’. You will find a product overview under ‘ ’. That overview also includes the power plugs available.
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Non-rewireable plug and connectors
Non-rewireable plugs and connectors means structural units which, in contrast to removable plug and connectors, are built to form an integrated, inseparable whole with the flexible cord. You will find a product overview under ‘ ’.
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Interconnection cords
Interconnection cords means structural units consisting of a flexible cord fitted with a plug and a connector built for interconnecting or disconnecting any appliance or installation with/from any other appliance or installation by means of a power cord. You will find a product overview under ‘ ’.
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Power entry modules with or without filter
Means power entry modules (PEM), i.e. modules including different functional elements, such as:
•␉IEC appliance inlet / outlet
•␉switch including bowden cable actuation
•␉circuit breaker
•␉fuseholder
•␉voltage selector
•␉EMC filter
The advantages of PEM over individual components include:
•␉compact design
•␉only one product with electrically linked individual components
•␉efficient assembly
•␉alternative design options with similar dimensions
•␉Protected, assembled and already tested/approved power supply components
You will find a detailed product overview under ‘ ’ and ‘ ’.
IEC appliance inlets / outlets
The IEC appliance inlets and outlets correspond to the individual components already presented in compliance with the IEC’s appliance couplers standards. You will find a detailed product overview under ‘ ’.
A specific approach is the shuttered outlet that protects unintended contact with life parts by movable protection shutters. They will be moved away by the insertion of the plug connector. The product is herewith ideally suitable to be used in applications to be used by children.
A special design is the protected outlet. The individual connections of a distribution unit can be limited by its power consumption by using a . The optional neon indicates the correct operation stage of the power line.
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EMC filters
Ensuring the electromagnetic compliance (EMC) of specific appliances may necessitate the use of filter components, colloquially referred to as inlet filters or IEC inlet filters. Filters may also be used in addition to the PEM described above. You will find a detailed product overview under ' '.
Distribution units
Means components used to, for instance, supply a multitude of appliances equipped with IEC appliance couplers with power from only one country-specific power supply cord via several interconnection cords. You will find a detailed product overview under ‘ ’.
Since, due to the lack of standards, distribution units have only limited UL and VDE approval, modular solutions assembled from approved individual components (inlets/outlets) have been made available. The applicable nominal voltage, the cord retainers and the necessary conductor cross-sectional areas (gauge) can be specifically selected depending on the relevant application area.
Covers
Protective caps or covers for appliance inlets and power entry modules prevent inadvertent contact with the live parts on the appliance’s interior. They are made from flexible plastic and can be pushed onto the components from the rear. Compatibility information on the various types of covers is available in a relevant data sheet.
Cord retaining clamps
Cord retaining clamps ensure firm push-on connections. The compatibility of the selected appliance couplers is imperative for reliable protection. You will find a detailed product overview on cord retaining clamps in the chapter "pullout prevention on pluggable power supplies".
Terminals
The appliance couplers’ terminals refer to the contacts on the appliance’s interior, designed according to the customers’ individual needs. We distinguish between the following types:
Solder tabs
The solder tab is a plated metal tongue for fastening a connecting stranded wire by soldering it on. The solder tabs’ geometry may vary. The corresponding connection dimensions are listed in the relevant data sheet.
PCB connectors
The PCB connector is a plated metal contact for soldering onto a contact conductor’s contact point on a PCB. We basically distinguish between Through-Hole Technology (THT) and Surface Mount Technology (SMT). The connections’ geometry is specified in the relevant data sheet.
Quick-connect terminals
Quick connect, push-on or blade terminals feature metal blades with standardized dimensions. They are also referred to as faston terminals, typically measuring 4.8 x 0.,8 mm, 6.3 x 0.,8 mm. The terminal dimensions are specified in the relevant data sheet. Correspondingly, the connecting stranded wires must be fitted with flat pin bushings of identical dimensions.
IDC terminals
In IDC terminals respectively connectors (IDC meaning ‘Insulation Displacement Connector’), the strands of the connecting stranded wire or wire are, without prior preparation of the power cord, pushed onto the insulation cutting terminal, the terminal cutting the insulation open and the clamping connection fastening the stranded wire or wire ensuring the electrical connection. In order to ensure a perfect connection, the conductors’ cross-sectional areas as specified in the relevant data sheet must be observed.
Screw-on terminals
Screw-on terminals are simple clamp fasteners using stud screws for fastening the connecting stranded wires.
Stranded wires
Power supply is also possible without using additional cabling components, because appliance couplers are available pre-fitted with the connecting stranded wires. Stranded wires pre-fitted with plugs are also available upon request for mounting the power entry module into the target appliance without the need for any further process steps.
Overload protection by thermally operated CBEs
Fig. 1 Thermal only CBE
Fig. 2 Contact force versus deflection
1) Latch-type mechanism
2) Spring-type mechanism
Thermal circuit breakers for equipment, CBEs, (figure 1), simulate the electrothermal behaviour of the protected components (conductors in wiring, motors, transformers, etc.) by a simple, but very clever device: The thermo-bimetal.
This mechanical element can simulate the heating effect of the current, can transform electric energy into a motion (deflection) and trigger a mechanism to cause automatic interruption of the current which produces these effects.
To use the heat created by the current instead of the magnitude of the current itself offers a great advantage, because heat determines the admissible stress of the insulation and the admissible duration of the various overload conditions encountered in practical applications.
Thermally operated CBEs, therefore, take good care of the surplus energy required for start-up or high-torque operation of motors. They cope well with high inrush spikes which occur in switching power supplies, transformers, tungsten filament lamps, etc. and avoid nuisance tripping due to such transients.
The CBEs of the T-Line use a «latch-type» mechanism. High contact force can be maintained until the unit trips. This prevents electrical «noise» due to contact bounce and reduces the risk of contact welding which may occur with spring type mechanisms (figure 2).
Advantages
The strong points of thermal CBEs are:
• Good simulation of the thermal behaviour of the protected component
• Capability of coping with start-up and inrush currents
• Suitability for a wide range of frequencies
• Simplicity / reliability
• Favourable price
Thermally operated CBEs are temperature sensitive. This, in most applications, is an advantage because the withstand capacity of the component to be protected is almost always temperature sensitive, too. The variation of the operating characteristics of thermal breakers with ambient temperature is closely matched to the admissible thermal stress of PVC insulations. For other insulations, the matching is not as close but the tendency exists, in principle, in any application where the protective device and the component to be protected are operating in an environment of practically identical ambient air temperature.
Thermal CBEs can, to a certain degree, be adjusted to special requirements concerning the withstand capacity of the protected item.
Their delay time can be influenced in several ways. The task may be achieved by using a different method of heating the bimetal. Figure 3 illustrates two methods.
The most widely used method is the direct heating of a bimetal strip by the internal losses produced by the current passing through the bimetal (example A). Where such losses are insufficient to produce enough heat and to cause sufficient deflection, a heater winding is wrapped around the bimetal strip to obtain the required heat. Since the heat has to pass through an insulation before it reaches the bimetal, a time lag will occur and a delayed action will result (example B).
The typical tripping zone of thermal CBEs is shown by figure 4. It changes with ambient temperature in a similar way as the withstand characteristic of a PVC insulated wire does (figure 5). The possibilities can be extended by using a shunt terminal as shown in figure 6.
The shunt terminal provides a parallel switched circuit to the main current sensing circuit.
Fig. 3a Simulation by bimetals (directly heated)
Fig. 3b Simulation by bimetals (indirectly heated)
Fig. 4 Typical tripping zone
Fig. 5 Range of protection
Fig. 6a Circuit diagrams - standard version
Fig. 6b Circuit diagrams - shunt terminal
Voltage selectors
Operating appliances in international markets requires taking into account the country-specific power supply systems. An appliance capable of operating under different voltages must allow the user to select and display such voltages. SCHURTER provides three differently configurable voltage selectors for such purposes.
Voltage Selector
Series-parallel connection
Allows the user to achieve a multitude of line voltages with one transformer with three primary windings and one secondary winding.
Step switch
This circuit allows the user to select up to four primary voltages.
Jumper
The easiest way to set only two voltages is by using a jumper.
Wire harness
The wire harness service includes several types of ready to install wires, cables or wire harnesses with custom specific end terminal connections. The SCHURTER products such as IEC 320 connectors, power entry modules or filter products with quick connect, solder or screw on terminals can be assembled with above custom specific interconnection solutions.
1) SCHURTER connector type, 2) Connector terminals, 3) Receptacles, 4) Wire-type and colour, 5) Wire length, 6) Wire end terminal
Connector / power entry module products
As power entry elements or so-called PEM (Abbreviation for Power Entry Module) refer to items that contain, in addition to a pure plug-in device more functional elements, such as switch, circuit breaker, fuse holder, voltage selector.
EMC connector filter
EMC connectors and PEMs are IEC60320 inlets equipped with an EMC filter function and provide the necessary attenuation to meet in the stringent EMC requirements in the various application fields.
The above-mentioned components with various interconnection terminal types such as quick connect, solder or screw-on terminals are available with wire harness (for details see catalogue data sheet respectively the WEB selector).
Quick connect / fast-on terminals
The quick connect or fast-on terminals correspond to metal mounting clamps with standard dimensions, typically in the size of 4.8 x 0.8 mm, 6.3 x 0.8 mm. The dimensions of the connections are specified in the product data sheet of the connector or power entry module component. Accordingly, the flexible wire end needs to be assembled by a quick connect terminal of a female type with the same dimensions.
Solder terminals
Solder connections are made of a coated metal tab for attaching a flexible wire by soldering. The soldering terminals may be of geometrically different characteristics. The dimensions of the solder terminals are given in the product catalogue data sheet.
Screw-on terminals
Screw on terminals are clamp fixtures, connecting flexble wires using threaded pins or wholes with screws or nuts.
Flexible wires
Wires used will be available as AWG18, AWG16, AWG14 cables according UL3266 in standard colours such as brown, black, bright blue, yellow-green and customized lengths.
(AWG stands for American Wire Gauge and is a coding for wire diameter, which is mainly used in North America. It features electric lines of stranded and solid wire and is used mainly in electrical engineering to describe the cross section of wires.)
Wire end terminals
The connections of the wire harness are determined by the selected Power Entry Module part. At the free end the flexible wires are individually assembled to customers' specifications.
Standard connections are provided as for example quick connect terminals 6.3 mm or 4.8 mm, ring terminals M4 or individual leads. Connections are possible with a full insulation, partly insulated or without.
Quick connect terminals 4.8 x 0.8 mm or 6.3 x 0.8 mm
Terminal ring M4 and M5
Wire end stripped
Custom specific
overview: Standard end terminal connections
Product samples with wire harness
5120 Inlet filter with flexible wires and quick connect terminals, fully insulated
KD power entry module with wire harness and custom specific end terminals
Other product types of the large SCHURTER catalog offering will be included in the wire harness service in the near future.
Further details
At the start of the project, initial sample are provided by the manufacture to confirm the quality of the components and the interconnections. The serial production can start as soon as the customer release of the initial samples and the drawingis is ready.
6600 EC11 KFC
Samples with wire harness
Further details about wire harness options can be found on the SCHURTER website inquiry form for wire harness.
Please send to us a contact request with the a note "Offer" for the products you would like or use the product specific offer request
Generally products are available in 5 years, insofar as there is no alternative suggested or the product has not been flagged as a phase out product.
Should the information sent not answer your question, please do not hesitate to send us a contact request with your concerns.
This information can not be answered in general. Independence of product and number of these values are very different. Packaging for automated processing as SMD Reals are referenced in the product data sheets and described in detail.
"SCHURTER sells Products via independant Sales Partner . The payment conditions are then set correspondingly by these suppliers and could, for example, be checked by the Partner Stock Check which is updated daily.
Here you have the possibility to learn about the payment conditions for this sales channel. Furthermore there is the possibility to see various General Terms and Conditions of Sales of the SCHURTER group companies."
The delivery costs are dependant of the supplier and the delivery conditions and therefore cannot be generalised.
"SCHURTER sells Products via independant Sales Partner . The prices are then correspondingly set by these suppliers and could, for example, be checked by the Partner Stock Check which is updated daily.
The delivery times can be discovered by checking the Stock Check or in the section Stock Check Distributor in real time. Basically products, which are labelled with "A=regularly ordered", are available in the shortest time.
For each article it is possible to check the Stock Check Distributor . You then have the chance to check the daily worldwide availability for each article.
On the right side of the screen there is a support tab, which offers various support possibilities. Through chat you can receive immediate support from your sales organisation. Furthermore you can contact us at will by telephone or email.
Depending on the chosen construction and standard Touchscreen, we can supply you with proto products within 3-8 weeks.
Our solutions – features – prototyping
"We make an effort to supply you with the desired sample in the shortest possible time. Please consider the product with the note ""A=regularly ordered"" are mostly available.
It is our goal to support you with the support you in the best possible way. "
Please send us a Sample Request with the note "Sample Request" or chose the product specific sample request based on the data sheet.
We can offer logistics like JIT and other systems according your needs.
competences & quality - competences
All our Projective Capacitive Touchscreens (PCAP) are capable to use with multi touch operation up to 10 fingers simultaneously.
Projected capacitive touchscreens (PCAP)
SCHURTER Input Systems has a wide range of different switching products in their portfolio. One of our expertise is combining your required switching technology in one product.
Our solutions–technologies–integrated systems
SCHURTER Input Systems has a wide range of different touchscreen technologies. You can discuss your needs with your sales representative for the best touchscreen solution for your application.
Our solutions – technologies – touchscreen solutions
SCHURTER Input systems has long time experience in complete product assemblies and testing. This includes the integration in your preferred housing.
Our solutions – technologies – housings
SCHURTER Input systems has long time experience in complete product assemblies and testing. This includes the integration of your preferred display.
Our solutions–technologies–integrated systems
SCHURTER Input systems has long time experience in complete product assemblies and testing. This includes the integration of your preferred display, housing, computer unit etc.
Our solutions–technologies–integrated systems
SCHURTER Input Systems has all tools to modify and create the controller firmware software.
competences & quality - competences
Based on our experience in various applications and housing materials, we can advise you with the best possible housing material for your application.
Our solutions – technologies – housings
Based on wide range of different products experience can we advise you on the best suitable glass for your application. If complex glass is required, our glass partners are happy to assist in the best product advice.
Our solutions – technologies – touchscreen solutions – pcap
Our extensive in house knowledge allows you to combine different switching technology in one product. This includes capacitive switching and capacitive touchscreens.
Our solutions–technologies–integrated systems
SCHURTER Input Systems has a wide range of standard AMT products. We also have standard SCHURTER PCAP sensor to create your custom product.
Our solutions – technologies – touchscreen solutions – pcap
We have a wide range of standard AMT / SCHURTER made Touchscreens available. Please see the list in the download section.
Documents – AMTS standard TS overview
We have possibilities with partner companies to provide digital printed glass. Experience learned that normal screen printed products have the highest possible quality.
Custom made products are in-house designed and produced. After the proto stage, custom made products are produced at an Asian partner.
Our solutions – technologies – touch solutions
SCHURTER is using film based resistive and capacitive constructions. Glass cover lenses are available for both touchscreen systems.
Our solutions – technologies – touchscreen solutions
SCHURTER Input Systems has experience in different kind of controllers available in the market. Our main controllers used for PCAP touchscreens are from PenMount, EETI, Atmel and DH Electronics.
Suitable accessories for each product are specified in the datasheets for the chapter "Mating Components"
For some of the controllers a schematic and BOM is available for integration onto your own PCB.
Our solutions – technologies – touchscreen solutions – pcap
All touchscreens are suitable for the most common operating systems within the industry. Please go to the
for the software driver of your chosen software platform. If further assistance is required, please
.
Basically the sales offices are responsible The Terms and Conditions of the SCHURTER group companies can give information about returns. Alternatively you can transmit a message regarding quality by using the Contact form
No, actually there is no reliable solution
Yes, on your request we chromalise the backside (el. conductive)
Our solutions – technologies – housings
There is a limitation in thickness of coverlens glass. Normally our touchscreens are suitable to operate through 1mm – 10mm thick glass. For thicker glass special sensor design might be applicable.
Our solutions – technologies – touchscreen solutions – pcap
In the product datasheets alternatives are referenced as long as they are available
Ceramic printed glass burns-in the ink into the glass surface. This glass is suitable for extreme environmental conditions like outdoor.
We have AutoCAD XXX, Solid Works XXX and Abdobe Illustrator XXX
The cost of a touchscreen depends on many factors as construction, size and level of integration. A standard price can not be given due to this reason. Please contact your sales representative to discuss your needs and pricing.
A resistive touchscreen is based on a mechanical switching principle, two transparent conductive materials are pressed on each other for an electrical contact and position. A capacitive touchscreens is based change of a capacitance value created by the operator finger. The location of capacitance change will determine the touch position.
Projected capacitive touchscreens (PCAP)
SCHURTER Input Systems using film based resistive and capacitive touchscreens. Due to machine and material limitations we produce touchscreen up to a diagonal of 24”
Projected capacitive touchscreens (PCAP)
We can print overlays and glass to a maximum viewing area diagonal of 24”
Projected capacitive touchscreens (PCAP)
There is no mechanical limitation for the minimum size. Practically we do make touchscreens between a diagonal of 4.3” and 24”.
Projected capacitive touchscreens (PCAP)
Optical bonding is a relative new technology in the market. SCHURTER is in the front line of using this technology for their products. Various proto products and small volume projects are completed.
Our solutions – features – optical bonding
We can provide products integrated in housings made of Aluminum, stainless steel, TSG or your provided housing.
Our solutions – technologies – housings
In the Catalog all standard products are described in detail with the corresponding product specifications. Alternatively you can search for various terms. If there is a correlation with a product, the results are shown in the category Products and / or in the subcategory Data.
All our specifications can be found in our download section. If your question is not answered, please contact your sales representative for more technical support.
In the relevant Cross Reference List you have the possibility to find a suitable SCHURTER product alternative for a competitor. To improve the usability we have separated each section. Alternatively Cross Reference searches can be carried out using the normal Search function. The results for the searches are shown in the subcategory Cross Reference
Technical information is described in each product datasheet. Furthermore continuative information is described in the General Product Information
General requests can be sent by the Contact form . For every article you have the possibility to place a product specific request.
We do recommend etched anti glare glass for the best optical properties and finger print protection.
Our solutions – technologies – touchscreen technologies – pcap
SCHURTER Input Systems has experience in different kind of controllers available in the market. Our main controllers used for PCAP touchscreens are from Penmount, EETI, Atmel and DH Electronics.
