DATASHEET
Pulse Transformers IT series with single
secondary winding
Pulse Transformer with Single Secondary Winding
Galvanic separation of drive and power circuit
Voltage resistance up to 8 kV
Ignition current up to 3 A
Turns ratio up to 3:1
Approvals
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.
Technical specifications
Nominal operating voltage
Ignition currents
Max. partial discharge voltage
Rise time
Test voltage
Up to 3000 V
0.1 to 3 A @ 40 °C
1.5 x U<sup>nom</sup>
Features and benefits
Galvanic separation
Voltage resistance up to 8 kV
Optional grounded shields
Vacuum potting
Temperature range (operation and storage)
Flammability corresponding to
Operating frequency
0.3 to 2.3 µs
Up/50 Hz/2s max. according to VDE 110b
-25 °C to +70 °C (25/70/21)
UL 94 V-0 listed materials
40 kHz max.
Allows high potential difference voltage scaling
Very low partial discharge effects
PCB through hole mounting or faston types
Custom-specific versions on request
500 kHz max. for data transmission
Typical applications
Gate drive circuit
Power supplies
Power converters
Frequency converters
DC/DC converters
Switching applications
Line coupling transformers in high-speed data
transmission
2
EMC/EMI Products
Schaffner Group
Datasheets
2014
Pulse transformer selection table
Pulse transformer
Turns ratio
Ignition
current
Iign
Voltage
Unom
500
750
500
750
[V]
Up
time area
V0t
Voltage
time
tr
Rise
Inductance*
Lp
Lstr
Resistance
Rp
Rs
capacitance
Ck
[pF]
6
Coupling
Input/ Output
connections
Weight
IT 155
IT 245
IT 237
IT 239
IT 255
IT 258
IT 370
IT 364**
IT 246
IT 248
IT 260
* Tolerance: +50%; -30%
** Not suitable for PCB-mounting.
1:1
1:1
1:1
1:1
1:1
1:1
1:1
1:1
2:1
2:1
3:1
[A]
0.1
0.1
[kV]
4
4
[Vμs]
480
500
[μs]
0.25
0.25
0.25
1
1
3
0.1
1000
750
2.5
4
6
1100
250
300
1.2
1
[mH]
5
[μH]
1000
3000
750
3.2
5
8
4000
5000
200
250
0.25
0.6
1.7
0.4
1.1
2.3
1
25
2.2
0.3
1.5
7
3
8
100
85
[Ω]
80
3
35
1.48
0.9
1.2
[Ω]
1.9
1.48
0.9
1.2
2.2
10
5
02
[g]
50
8
02
13
2.5
40
6
10
35
0.16
0.62
0.16
2.1
0.8
0.18
0.75
0.14
1.1
0.8
02
02
40
80
35
7
02
13
6
14
6
02
02
05
220
6
71
6
0.25
0.1
750
3.2
3.2
4
350
2.2
17
12
80
3.2
2
1.6
9
02
02
6
500
200
0.3
30
0.8
8
02
6
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
EMC/EMI Products
Schaffner Group
Datasheets
2014
Mechanical data
IT 245, IT 246, IT 248, IT 255, IT 258, IT 260
IT 239
IT 155, IT 237
IT 364
IT 370
Dimensions
A
B
C
E
F
IT 245
17.6*
16.7*
IT 246
17.6*
16.7*
IT 248
17.6*
16.7*
IT 255
17.6*
16.7*
IT 258
17.6*
16.7*
IT 260
17.6*
16.7*
IT 239
D
11.3*
0.42
15.3
12.5
2
0.4
5
11.3*
0.42
15.3
12.5
2
0.4
5
11.3*
0.42
15.3
12.5
2
0.4
5
11.3*
0.42
15.3
12.5
2
0.4
5
11.3*
0.42
15.3
12.5
2
0.4
5
11.3*
22.5
5
27
IT 155
0.42
15.3
12.5
2
0.4
5
13.7
22.5
5
27
IT 237
13.7
22.5
5
27
IT 364
50
IT 370
13.7
50
0.45
0.7
20
15
2.5
0.45
0.7
20
0.45
0.7
20
10*
60
32.2
5.5
27
Tol.
±0.2
±0.2
±0.2
23.7
Ø0.8
3.5
20
+1/-0
G
H
I
L
3.5
7.5
M
N
* Tolerance is ±0.1
2.5
3.5
7.5
42
42
10
±0.2
±0.2
±0.2
±0.2
2.5
Ø4.2
25
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
EMC/EMI Products
Schaffner Group
Datasheets
2014
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