Datasheet for the Würth Elektronik WE‑CST Current Sense Transformer, model 7492540050, with electrical specs, packaging and handling information.
The WE‑CST Current Sense Transformer (model 7492540050) is a magnetic component designed for general electronic equipment. It provides a 1:50 turns ratio, rated current of 40 A, inductance of at least 1.4 mH, and operates from –40 °C to +130 °C. Electrical parameters such as DC resistance, voltage‑time integral and frequency range up to 1 MHz are detailed in the datasheet.
The document also includes packaging specifications for tape, reel, inner carton and outer carton, as well as reflow profile guidelines, cautions, warnings, and certification information (RoHS, REACH, AEC‑Q200). Storage conditions, moisture sensitivity level, and handling recommendations are provided to ensure reliable performance.
| Inductance L | 1.4 mH min |
|---|---|
| Rated Current IR | 40 A typ |
| DC Resistance 1 (RDC1) | 0.28 mΩ max |
| DC Resistance 2 (RDC2) | 0.202 Ω ±10% |
| Turns Ratio | 1:50 |
| Voltage‑Time Integral | 124 µVs max |
| Frequency Range | Up to 1 MHz |
| Rated Voltage VR | 80 V |
| Insulation Test Voltage | 1500 V AC |
| Operating Temperature | -40 °C to +130 °C |
| Moisture Sensitivity Level (MSL) | 1 |
| Storage Conditions (original packaging) | <40 °C; <75 % RH |
The rated current is 40 A typ.
The turns ratio is 1:50.
Store the component in its original packaging at temperatures below 40 °C and humidity below 75 % RH.
The transformer can operate up to 1 MHz.