Datasheet IT242 Specification

DATASHEET Pulse Transformers IT series with double

secondary winding

Pulse Transformer with Double Secondary Winding

Galvanic separation of drive and power circuit

Voltage resistance up to 4kV

Ignition current up to 1A

Turns ratio up to 3:1:1

Technical specifications

Flammability co rresponding to UL 94 V-0 listed materials

Ignition cu rrents 0.025 to 1A @ 40 °C

Max. partial discharge voltage 1.5 x U<sup>nom<sup>

Nominal operating vo ltage Up to 500 V

Operating frequency 40 kHz max.

500 kHz max. for data transmission

Rise time 0.4 to 4 µs

Temperature range (o peration and storage) -25 °C to +70 °C (25/70/21)

Test voltage Up/50 Hz/2s max. according to VDE 110b

Approvals

Features and benefits

Galvanic separation with secondary winding.

Voltage resistance up to 4 kV.

Allows high potential difference voltage scaling.

Vacuum potting.

Very low partial discharge effects.

PCB through hole mounting.

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

EMC/EMI Products Schaffne r Group Data sheets 2014

Pulse transformer selection table

Pulse transformer Turns ratio Ignition Voltage Voltage Rise Inductance Resistance Coupling Input/Output Weight

curren t time area time capacitance conn ections

I

ign Unom

Up V

0t

tr Lp L

str Rp

Rs Ck

[A] [V] [kV] [Vμs] [μs] [mH] [μH] [Ω] [Ω] [pF] [g]

IT 143 1:1:1 0.025 500 4 800 0.6 15 200 3 3 10 02 14

IT 242 1:1:1 0.1 500 3.2 250 0.9 2.5 75 0.75 0.75 7 02 6

IT 243 1:1:1 0.1 500 3.2 250 1 2.5 85 0.8 0.8 7 02 6

IT 213 1:1:1 0.25 380 2.5 450 0.4 6.5 20 1.4 1.4 40 02 9

IT 233 1:1:1 0.25 500 4 300 1.3 3 45 0.8 0.8 7 02 13

IT 253 1:1:1 0.25 500 3.2 160 1.3 1.1 45 0.55 0.55 6 02 6

IT 312 1:1:1 0.25 380 2.5 1200 1 21 35 2.4 2.7 30 02 24

IT 313 1:1:1 1 380 2.5 450 0.6 3 6 0.33 0.4 27 02 24

IT 249 2:1:1 0.25 500 3.2 330 4 17 140 3.1 1.5 9 02 6

IT 244 3:1:1 0.1 500 3.2 200 0.7 15 70 2.8 0.9 9 02 6

IT 234 3:1:1 0.25 500 4 280 1 17 40 2 0.7 9 02 13

IT 314 3:1:1 1 380 2.5 500 1 35 20 1.6 0.7 30 02 25

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).

– L

str

stray inductance measured at the secondary side, short circuit at th e pr imary side. If there are several secondary coils only one at th e 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).

Mechanical data

IT 213 IT 243, IT 244, IT 249, IT 253

IT 242 IT 143, IT 154, IT 233, IT 234

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EMC/EMI Products Schaffne r Group Data sheets 2014

IT 312, IT 313, IT 314

Dimensions

IT 213 I T 243 I T 244 I T 249 IT 253 IT 242 IT 143 IT 154 IT 233 IT 234 IT 312 IT 313 IT 314 Tol.

A Ø19 17.6 17.6 17.6 17.6 17.6 27* 27* 27* 27* 25.5* 25.5* 25.5* ±0.1

B 16.7 16.7 16.7 16.7 16.7 22.5* 22.5* 22.5* 22.5* 25.5* 25.5* 25.5* ±0.1

C 20 11.3 11.3 11.3 11.3 11.3 13.7 13.7 13.7 13.7 25* 25* 25* ±0.1

D 5 5 5 5 5 5 5 5 5 5 5 5 5 +1/-0

E 0.45 0.42 0.42 0.42 0.42 0.42 0.45 0.45 0.45 0.45 0.5 0.5 0.5

F 1 0.4 0.4 0.4 0.4 0.4 0.7 0.7 0.7 0.7 0.5 0.5 0.5

G 10 15.3 15.3 15.3 15.3 15.3 20 20 20 20 15 15 15

H 5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 7.5 ±0.2

I 2.1 2.1 2.1 2.1 2.1 3.75 3.75 3.75 3.75 5.25 5.25 5.25 ±0.2

K 5 5 5 5 5 5 5 5 ±0.2

L 2 2 2 2 2 2.5 2.5 2.5 2.5 3 3 3

* Tolerance is ±0.2

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

Please visit

www.schaffner.com to find more det ails on filter connectors.

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EMC/EMI Products Schaffne r Group Data sheets 2014

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