IS  Pulse transformers for SMD mounting

Series: IS

Pulse transformers for SMD mounting

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14 Variants


  • 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

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


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 Suitable for applications acc. IEC/UL 62368-1 Audio/video, information and communication technology equipment - Part 1: Safety requirements


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) 2015/863
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.


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

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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
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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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