IT370

## **Pulse Transformer with Single Secondary Winding** 

Galvanic separation of drive and power Approvals & Compliances eS circuit Voltage resistance up to 8 kV pauc WK Ignition current up to 3 A Turns ratio up to 3:1 

IT pulse transformers are designed to offer you galvanic isolation for transformer coupled gate drives. The IT series provides negligible delays and the possibility of voltage scaling. They are available with single or double secondary winding for multiple gate drives. Choosing the IT product line brings you the rapid availability of a standard gate drive transformer. A wide selection on turns ratio, ignition current and voltages are designed to offer you the desired standard product. 

## **Features and Benefits** 

## **Technical Specifications** 

|**Nominal operating voltage**|Up to 3000 V||
|---|---|---|
|**Operating frequency**|40 kHz max.||
||500 kHz max. for data transmission||
||DC to 40000 Hz||
|**Ignition currents**|0.1 to 3 A @ 40°C||
|**Rise time**|0.3 to 2.3 µs||
|**Test voltage**|Up/50 Hz/2 s max. according to VDE 110b|Up/50 Hz/2 s max. according to VDE 110b|
|**Max. partial discharge voltage**|1.5 x Unom||
|**Temperature range (operation and storage)**|-25°C to +70°C (25/70/21)||
|**Flammability corresponding to**|UL 94 V-0 listed materials||



Galvanic separation Voltage resistance up to 8 kV Allows high potential difference voltage scaling Optional grounded shields Vacuum potting Very low partial discharge effects PCB through hole mounting or faston types Custom-specific versions on request 

## **Typical Applications** 

Gate drive circuit Power supplies Power converters Frequency converters Switching applications DC/DC converters Line coupling transformers in high-speed data transmission 

2 Pulse Transformers 

**Schaffner Group DATA** SHEET 15. Jun 2022 

## **Pulse Transformer Selection Table** 

|**Pulse transformer**|**Turns ratio**|**Ignition**<br>**current**<br>**Iign**<br>**[A]**|**Voltage**<br>**Unom**<br>**Up**<br>**[V]**<br>**[kV]**|**Voltage**<br>**Unom**<br>**Up**<br>**[V]**<br>**[kV]**|**Voltage**<br>**time area**<br>**V0t**<br>**[Vμs]**|**Rise**<br>**time**<br>**tr**<br>**[μs]**|**Inductance***<br>**Lp**<br>**Lstr**<br>**[mH]**<br>**[μH]**|**Inductance***<br>**Lp**<br>**Lstr**<br>**[mH]**<br>**[μH]**|**Resistance**<br>**Rp**<br>**Rs**<br>**[Ω]**<br>**[Ω]**|**Resistance**<br>**Rp**<br>**Rs**<br>**[Ω]**<br>**[Ω]**|**Coupling**<br>**capacitance**<br>**Ck**<br>**[pF]**|**Input/ Output**<br>**connections**|**Input/ Output**<br>**connections**|**Weight**<br>**[g]**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**IT 155**|1:1|0.1|500|4|480|1|5|85|1.2|1.2|6|02||13|
|**IT 245**|1:1|0.1|750|4|500|1.2|8|100|1.48|1.48|10|02||6|
|**IT 237**|1:1|0.25|500|2.5|1100|1|25|35|1.9|2.2|50|02||14|
|**IT 239**|1:1|0.25|1000|6|300|2.3|3|80|0.9|0.9|5|02||13|
|**IT 255**|1:1|0.25|750|4|250|1.1|2.2|40|0.8|0.8|8|02||6|
|**IT 258**|1:1|1|750|3.2|250|0.25|2.5|3|0.62|0.75|80|02||6|
|**IT 370**|1:1|1|1000|5|4000|0.6|0.3|6|0.16|0.18|40|02||71|
|**IT 364****|1:1|3|3000|8|5000|1.7|1.5|10|0.16|0.14|35||05|220|
||||||||||||||||
|**IT 246**|2:1|0.1|750|4|200|0.4|7|35|2.1|1.1|7|02||6|
|**IT 248**|2:1|0.25|750|3.2|350|2.2|17|80|3.2|1.6|9|02||6|
||||||||||||||||
|**IT 260**|3:1|0.1|500|3.2|200|0.3|12|30|2|0.8|8|02||6|



* Tolerance: +50%; -30% 

** Not suitable for PCB-mounting. 

Explanations: 

– tr rise time at given load resistor R and 70% of the output pulse height. 

– Lp primary inductance measured at 1 kHz (secondary coile open). 

– Lstr stray inductance measured at the secondary side, short circuit at the primary side. If there are several secondary coils only one at the time is connected (measuring frequency 10 kHz). 

– The ignition current is a set peak value where the voltage drop over the coil resistance is still insignificant (mostly below 1 V). 

3 Pulse Transformers 

**Schaffner Group DATA** SHEET 15. Jun 2022 

## **Mechanical Data** 

## IT 245, IT 246, IT 248, IT 255, IT 258, IT 260 

## IT 239 

**==> picture [629 x 139] intentionally omitted <==**

## IT 155, IT 237 

## IT 364 

## IT 370 

## **Dimensions** 

||**IT 245**|**IT 246**|**IT 248**<br>**I**|**T 255**<br>**I**|**T 258**|**IT 260**|**IT 239**|**IT 155**|**IT 237**|**IT 364**|**IT 370**|**Tol.**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|**A**|17.6*|17.6*|17.6*<br>1|7.6*<br>1|7.6*|17.6*|27|27|27|50|27|±0.2|
|**B**|16.7*|16.7*|16.7*<br>1|6.7*<br>1|6.7*|16.7*|22.5|22.5|22.5|50|32.2|±0.2|
|**C**|11.3*|11.3*|11.3*<br>1|1.3*<br>1|1.3*|11.3*|13.7|13.7|13.7|60|23.7|±0.2|
|**D**|5|5|5<br>5|5||5|5|5|5|10*|5.5|+1/-0|
|**E**|0.42|0.42|0.42<br>0|.42<br>0|.42|0.42|0.45|0.45|0.45||Ø0.8||
|**F**|0.4|0.4|0.4<br>0|.4<br>0|.4|0.4|0.7|0.7|0.7||3.5||
|**G**|15.3|15.3|15.3<br>1|5.3<br>1|5.3|15.3|20|20|20|42|20|±0.2|
|**H**|12.5|12.5|12.5<br>1|2.5<br>1|2.5|12.5|15|7.5|7.5|42|10|±0.2|
|**I**||||||||3.5|3.5|||±0.2|
|**L**|2|2|2<br>2|2||2|2.5|2.5|2.5||||
|**M**|||||||||||25|±0.2|
|**N**||||||||||Ø4.2|||



* Tolerance is ±0.1 

All dimensions in mm; 1 inch = 25.4 mm Tolerances according: ISO 2768-m/EN 22768-m 

Please visit www.schaffner.com to find more details on connectors. 

4 Pulse Transformers 

**Schaffner Group DATA** SHEET 15. Jun 2022 

## **Headquarters, Global Innovation and Development** 

## **Switzerland** 

## **Schaffner Holding AG** 

Industrie Nord Nordstrasse 11e 4542 Luterbach +41 32 681 66 26 info@schaffner.com 

To find your local partner within Schaffner‘s global network schaffner.com 

© 2022 Schaffner Group 

The content of this document has been carefully checked and understood. However, neither Schaffner nor its subsidiaries assume any liability whatsoever for any errors or inaccuracies of this document and the consequences thereof. Published specifica-tions are subject to change without notice. Product suitability for any area of application must ultimately be determined by the customer. In all cases, products must never be operated outside their published specifications. Schaffner does not guarantee the availability of all published products. This disclaimer shall be governed by substantive Swiss law and resulting disputes shall be settled by the courts at the place of business of Schaffner Holding AG. Latest publications and a complete disclaimer can be downloa-ded from the Schaffner website. All trademarks recognized. 

## **Sales and Application Centers** 

**China Schaffner EMC Ltd. Shanghai** T20-3 C, No 565 Chuangye Road,Pudong district 201201 Shanghai +86 2138139500 cschina@schaffner.com 

## **Finland** 

**Schaffner Oy** Sauvonrinne 19 H 8500 Lohja +358 50 468 7284 finlandsales@schaffner.com 

## **France** 

**Schaffner EMC S.A.S.** 16-20 Rue Louis Rameau 95875 Bezons +33 1 34 34 30 60 francesales@schaffner.com 

**Germany Schaffner Deutschland GmbH** Schoemperlenstrasse 12B 76185 Karlsruhe +49 721 56910 germanysales@schaffner.com 

## **India** 

## **Schaffner India Pvt. Ltd** 

Regus World Trade Centre WTC, 22nd Floor Unit No 2238, Brigade Gateway Campus, 26/1, Dr. Rajkumar Road Malleshwaram (W) 560055 Bangalore +91 8067935355 indiasales@schaffner.com 

## **Italy** 

## **Schaffner EMC S.r.l.** 

Via Ticino, 30 20900 Monza (MB) +39 039 21 41 070 italysales@schaffner.com 

## **Japan Schaffner EMC K.K.** 

ISM Sangenjaya 7F 1-32-12 Kamiuma, Setagaya-ku 154-0011 Tokyo +81 3 5712 3650 japansales@schaffner.com 

## **Singapore** 

**Schaffner EMC Pte Ltd.** 

Blk 3015A Ubi Road 1, #05-09, Kampong Ubi Industrial Estate 408705 Singapore +65 63773283 singaporesales@schaffner.com 

## **Spain** 

## **Schaffner EMC España** 

Calle Caléndula 93, Miniparc III, Edificio E El Soto de Moraleja, Alcobendas 28109 Madrid +34 917 912 900 spainsales@schaffner.com 

## **Sweden** 

**Schaffner EMC AB** Östermalmstrorg 1 114 42 Stockholm +46 8 5050 2425 swedensales@schaffner.com 

## **Switzerland** 

## **Schaffner EMV AG** 

Industrie Nord Nordstrasse 11e 4542 Luterbach +41 32 681 66 26 switzerlandsales@schaffner.com 

## **Taiwan** 

## **Schaffner EMV Ltd.** 

U-Town 20 Floor-2, No 97, Section 1, XinTai 5th Road, XiZhi District 22175 New Taipei City +886 226975500 taiwansales@schaffner.com 

## **Thailand** 

## **Schaffner EMC Co. Ltd.** 

Sathorn Square Tower Room 3780, 37FL, 98 North-Sathorn Rd, Silom, Bangrak 10500 Bangkok +66 621056397 thailandsales@schaffner.com 

**United Kingdom Schaffner Ltd.** 1, Oakmede Place Terrace Road RG42 4JF Binfield +44 118 9770070 uksales@schaffner.com 

## **United States** 

**Schaffner EMC Inc.** 

52 Mayfield Avenue Edison, New Jersey +1 732 225 9533 usasales@schaffner.com