Pulse Transformers IT Series with Double Secondary Winding
The Pulse Transformers IT series with double secondary winding provide galvanic separation between drive and power circuits. They offer 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 feature very low partial discharge effects due to vacuum potting. They are suitable for PCB through-hole mounting and custom-specific versions are available on 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 circuits
- 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] | Voltage Test (Up) [kV] | V0t [kVs] | 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 | 2 |
| IT 242 | 1:1:1 | 0.1 | 500 | 3.2 | 250 | 0.9 | 2.5 | 75 | 0.75 | 0.75 | 7 | 6 |
| IT 243 | 1:1:1 | 0.1 | 500 | 3.2 | 250 | 1 | 2.5 | 85 | 0.8 | 0.8 | 7 | 6 |
| IT 213 | 1:1:1 | 0.25 | 380 | 2.5 | 450 | 0.4 | 6.5 | 20 | 1.4 | 1.4 | 40 | 9 |
| IT 233 | 1:1:1 | 0.25 | 500 | 4 | 300 | 1.3 | 3 | 45 | 0.8 | 0.8 | 7 | 13 |
| IT 253 | 1:1:1 | 0.25 | 500 | 3.2 | 160 | 1.3 | 1.1 | 45 | 0.55 | 0.55 | 6 | 6 |
| IT 312 | 1:1:1 | 0.25 | 380 | 2.5 | 1200 | 1 | 21 | 35 | 2.4 | 2.7 | 30 | 24 |
| IT 313 | 1:1:1 | 1 | 380 | 2.5 | 450 | 0.6 | 3 | 6 | 0.33 | 0.4 | 27 | 24 |
| IT 249 | 2:1:1 | 0.25 | 500 | 3.2 | 330 | 4 | 17 | 140 | 3.1 | 1.5 | 9 | 6 |
| IT 244 | 3:1:1 | 0.1 | 500 | 3.2 | 200 | 0.7 | 15 | 70 | 2.8 | 0.9 | 9 | 6 |
| IT 234 | 3:1:1 | 0.25 | 500 | 4 | 280 | 1 | 17 | 40 | 2 | 0.7 | 9 | 13 |
| IT 314 | 3:1:1 | 1 | 380 | 2.5 | 500 | 1 | 35 | 20 | 1.6 | 0.7 | 30 | 25 |
Note: 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 a 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).
Product Attributes
- Brand: Schaffner
- Certifications: UL 94 V-0 listed materials
- Mounting: PCB through hole
Dimensions (mm)
| Model | A | B | C | D | E | F | G | H | I | K | L |
| IT 213 | 17.6 0.1 | 16.7 0.1 | 20 0.1 | 5 +1/-0 | 0.45 | 1 | 10 | 5 | 2.1 | 5 | 2 |
| IT 243, IT 244, IT 249, IT 253 | 17.6 0.1 | 16.7 0.1 | 11.3 0.1 | 5 +1/-0 | 0.42 | 0.4 | 15.3 | 7.5 | 2.1 | 5 | 2 |
| IT 242 | 27* 0.1 | 22.5* 0.1 | 13.7 0.1 | 5 +1/-0 | 0.45 | 0.7 | 20 | 7.5 | 3.75 | 5 | 2.5 |
| IT 143, IT 154, IT 233, IT 234 | 27* 0.1 | 22.5* 0.1 | 13.7 0.1 | 5 +1/-0 | 0.45 | 0.7 | 20 | 7.5 | 3.75 | 5 | 2.5 |
| IT 312, IT 313, IT 314 | 25.5* 0.1 | 25.5* 0.1 | 25* 0.1 | 5 +1/-0 | 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-IT233_C6884224.pdf
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