DATA SHEET
Pulse Transformers IT series with double
secondary winding
Pulse Transformer with Double Secondary Winding
Galvanic separation of drive and power
circuit
Approvals & Compliances
Voltage resistance up to 4 kV
Ignition current up to 1 A
Turns ratio up to 3:1:1
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
Technical Specifications
Power supplies
Power converters
Nominal operating voltage
Up to 500 V
Frequency converters
Operating frequency
40 kHz max.
500 kHz max. for data transmission
DC to 40000 Hz
Switching applications
Ignition currents
0.025 to 1 A @ 40°C
Rise time
0.4 to 4 µs
Test voltage
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
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
Voltage
current
Iign
Voltage
Rise
Inductance *
Resistance
Coupling
Input/Output
capacitance
connections
time area
time
Unom
Up
V0t
tr
Lp
Lstr
Rp
Rs
Ck
Weight
[A]
[V]
[kV]
[Vμs]
[μs]
[mH]
[μH]
[Ω]
[Ω]
[pF]
IT 143
1:1:1
0.025
500
4
800
0.6
15
200
3
3
10
02
[g]
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
* Tolerance: +50%; -30%
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).
Mechanical Data
IT 213
IT 243, IT 244, IT 249, IT 253
IT 242
IT 143, IT 154, IT 233, IT 234
3
Pulse Transformers
Schaffner Group
DATA SHEET
15. Jun 2022
IT 312, IT 313, IT 314
Dimensions
IT 213
IT 243
IT 244
IT 249
IT 253
IT 242
IT 143
IT 154
IT 233
IT 234
IT 312
IT 313
IT 314
Tol.
Ø19
17.6
17.6
17.6
17.6
17.6
27*
27*
27*
27*
25.5*
25.5*
25.5*
±0.1
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
3
3
3
A
B
* Tolerance is ±0.2
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 filter connectors.
2.5
2.5
2.5
2.5
4
Pulse Transformers
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whatsoever for any errors or inaccuracies
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15. Jun 2022
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