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IS ISNA - Impulse transformer en IM0005121

Series: IS

Free Sample Request

Pulse transformers for SMD mounting

14 Variants

Description IS


  • High insulation rating (>3.2 kVAC) between the primary and the secondary windings
  • High insulation rating up to 500V between the secondary windings
  • Small coupling capacitances between primary and secondary windings limit transient feedback from the power supply side to the control electronics
  • The defined partial discharge voltage guarantees an effecively unlimited serviceable live


  • Galvanic separation of drive- and power-circuit
  • Mainly used in ignition circuits with Thyristors, Triacs, power transistors and IGBT's
  • DC/DC converters
  • Line coupling transformers in high speed data transmission
Date Subcategory Language Title Download

Rated voltage

up to 600 VAC

Voltage Time Integral

150 - 400 Vµs

Pulse Rise Time

0.05 - 1.5 µs

Turns Ratio

1:1, 2:1, 1:1:1

Terminal Type



3 - 10 g

Material: Housing

UL 94V-0 

Sealing Compound

UL 94V-0 

Climatic Category

25/100/21 acc. to IEC 60068-1

Allowable Operation Temp.

-25 °C to 100 °C

Detailed information on product approvals, code requirements, usage instructions and detailed test conditions can be looked up in  Details about Approvals

SCHURTER products are designed for use in industrial environments. They have approvals from independent testing bodies according to national and international standards. Products with specific characteristics and requirements such as required in the automotive sector according to IATF 16949, medical technology according to ISO 13485 or in the aerospace industry can be offered exclusively with customer-specific, individual agreements by SCHURTER.

Application standards

Application standards where the product can be used

Organization Design Standard Description
Partners IEC_Certification_Body Designed for applications acc. IEC/UL 60950 IEC 60950-1 includes the basic requirements for the safety of information technology equipment.


The product complies with following Guide Lines

Identification Details Initiator Description
Environment_Safety RoHS_Logo_color_CMYK_tif SCHURTER AG Directive RoHS 2011/65/EU, Amendment (EU) 2015/836
Environment_Safety China_RoHS_e_konform_eps SCHURTER AG The law SJ / T 11363-2006 (China RoHS) has been in force since 1 March 2007. It is similar to the EU directive RoHS.
Environment_Safety REACH SCHURTER AG On 1 June 2007, Regulation (EC) No 1907/2006 on the Registration, Evaluation, Authorization and Restriction of Chemicals 1 (abbreviated as "REACH") entered into force.


Picture(s) Selection of product pictures to display a specific variant of the type


Type Corresponds to a product series and includes various distinct variants. On the type of descriptive data are summarized, eg in the data sheet

Order Number

Order Number Unique part number for placing an order

Configuration key

Configuration key The configuration key of a product consists of the composite key values, which describe the different kinds of attribut distinction.

Model Description

Model Description Abbreviated description of the CAD model


IGS Also mentioned as IGES ( Initial Graphics Exchange Specification). Common program indipendent interchange format for 3D CAD data.


Step Also mentioned as STEP ( Standard for the Exchange of Product Model Data). Common program indipendent interchange format for 3D CAD data standardized according ISO standard.


Parasolid Parasolid modeling kernel is a 3D CAD systems. It is developed by a separate business unit within the Unigraphics Solutions (UGS), now Siemens PLM Software.


DXF (Drawing Interchange Format) is a specified by the Autodesk file format for CAD data exchange, and was developed for the 2D-CAD program AutoCAD. A DXF file describes a CAD model as plain text to the ASCII standard.

ISRF-0235-D101 ISNF-0135-D101
ISNA-0239-D202 ISRB-0239-D502 ISNB-0239-D202
ISNF-0239-D202 ISRF-0239-D502
ISRA-0249-D104 ISNA-0249-D104 ISRB-0249-D101 ISNB-0249-D101
ISNF-0249-D101 ISRF-0249-D101

Dimension [mm]

Case 35-3S

Case 35-4S

Case 39-3S

Case 39-4S

Case 49-3S

1) Prim.
Case 49-4S

1) Prim.
Possible solder land pattern for SMD mounting
Case 35S
Possible solder land pattern for SMD mounting
Case 49S
Possible solder land pattern for SMD mounting
Case 39S

Short Table of Variants IS Open complete table IS

Turns Ratio Tr [μs] Iign [A] Order Number

Variant Details

The link on the respective order number refers to a separat tab with specific detailed information .

This assures better readable information of the selected product.
Change to the tab All Products in order to show details of another variant.

This approach offers to use generic alias link to the product details:

www.schurter.xx/art/ [Order Number]

where the following variables are used:
- xx is the country specific domain
- [Order Number]

A=Most Popular

A=Most Popular

Most popular products have the following customer benefits:

- previously ordered by multiple customers
- generally in stock for immediate delivery
- early adoption or mature life cycle

Contact us for availability on other product variants, lead-times vary:

Availability for all products can be searched real-time. Enter part number and required quantity:
Stock Check SCHURTER

Free Sample

Free Sample

Please ask for free sample in order to check if the products meets your requirement for your application. Send your delivery adress and your specific requirements.

Distributor Stock Check

Distributor Stock Check

The following links reffers to the inquiry form for distributors stock information of the selected products. It allows checking for the available amount and optionally to place an order at your selected partner.

Distributor Stock Check
Stock Check Distributor

1:1 0.05 0.1 ISRA-0235-D103 ...
1:1 1 0.17 ISNA-0239-D202 ...
1:1 0.05 0.1 ISRA-0249-D104 ...
1:1 1 0.1 ISNA-0249-D104 ...
1:1:1 0.05 0.1 ISRF-0235-D101 ...
1:1:1 0.9 0.1 ISNF-0135-D101 ...
1:1:1 0.5 0.5 ISRF-0239-D502 ...
1:1:1 1.5 0.17 ISNF-0239-D202 ...
1:1:1 0.05 0.1 ISRF-0249-D101 ...
1:1:1 1 0.1 ISNF-0249-D101 ...
2:1 0.5 0.5 ISRB-0239-D502 ...
2:1 1.5 0.17 ISNB-0239-D202 ...
2:1 0.05 0.1 ISRB-0249-D101 ...
2:1 1 0.1 ISNB-0249-D101 ...

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