Pulse Transformers IT series with double secondary winding
The Pulse Transformers IT series offer galvanic isolation between drive and power circuits, featuring double secondary windings. They provide voltage resistance up to 4 kV and ignition currents up to 1 A, with turns ratios up to 3:1:1. These transformers are designed for applications requiring high potential difference voltage scaling and exhibit very low partial discharge effects due to vacuum potting. They are suitable for PCB through-hole mounting and custom-specific versions are available upon request.
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
Technical Specifications
| Model | Turns ratio | Ignition Current Iign [A] | Nominal Operating Voltage Unom [V] | Test Voltage Up [kV] | Voltage Rise V0t [Vs] | Rise Time tr [s] | Primary Inductance Lp [mH] | Stray Inductance Lstr [H] | Resistance Rp [] | Resistance Rs [] | Capacitance Ck [pF] | Weight [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 |
* 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 coil 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
| Model | A | B | C | D | E | F | G | H | I | K | L |
| IT 213 | 17.6 | 16.7 | 20 | 5 | 0.45 | 1 | 10 | 5 | 2.1 | 5 | 2 |
| IT 243, IT 244, IT 249, IT 253 | 17.6 | 16.7 | 11.3 | 5 | 0.42 | 0.4 | 15.3 | 7.5 | 2.1 | 5 | 2 |
| IT 242 | 27* | 22.5* | 13.7 | 5 | 0.45 | 0.7 | 20 | 7.5 | 3.75 | 5 | 2.5 |
| IT 143, IT 154, IT 233, IT 234 | 27* | 22.5* | 13.7 | 5 | 0.45 | 0.7 | 20 | 7.5 | 3.75 | 5 | 2.5 |
| IT 312, IT 313, IT 314 | 25.5* | 25.5* | 25* | 5 | 0.5 | 0.5 | 15 | 7.5 | 5.25 | 5 | 3 |
* Tolerance is 0.2
All dimensions in mm; 1 inch = 25.4 mm
Tolerances according: ISO 2768-m/EN 22768-m
2411272239_TE---Schaffner-IT213_C6061919.pdf
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