STMicroelectronics STPS40M120CT, Schottky diode array, 1 pair common cathode, 120 V DC reverse voltage, 20 A average rectified current per diode, 790 mV forward drop at 20 A, fast recovery ≤500 ns, TO-220-3 through-hole package.
| Parameter | Value |
|---|---|
| Diode type | Schottky |
| Mounting | Through Hole |
| Voltage - DC reverse (Vr) | 120 V |
| Voltage - forward (Vf) (Max) @ if | 790 mV @ 20 A |
| Current - reverse leakage @ vr | 370 µA @ 120 V |
| Current - average rectified (Io) (per diode) | 20A |
| Operating temperature - junction | 150°C(Max) |
| Speed | Fast Recovery =< 500ns, > 200mA (Io) |
| Package | Tube |
| Case | TO-220-3 |
| Diode configuration | 1 Pair Common Cathode |
It pairs two 20 A Schottky diodes with a common cathode configuration, rated for a maximum DC reverse voltage of 120 V. Forward voltage is specified at 790 mV when each diode carries 20 A, keeping conduction losses manageable in continuous-current designs.
It is ROHS3 compliant, covering the latest exemption categories for EU and global markets.
The STPS40L120CT is a lower-Vf variant (typically 0.57 V at 20 A) but with higher leakage at temperature. The STPS40M120CT has a higher forward voltage (790 mV at 20 A) but lower reverse leakage (370 µA at 120 V). They are pin-compatible in the same TO-220-3 footprint, so a direct swap is possible if the higher Vf is acceptable in your thermal budget and the lower leakage is beneficial for high-temperature operation.
Yes, it is ROHS3 compliant.
The Schottky barrier provides fast recovery (≤500 ns) with no stored charge, making it suitable for moderate-frequency switching up to around 100 kHz. For higher frequencies (above 200 kHz), junction capacitance becomes a factor — review the datasheet's capacitance vs reverse voltage curve for your specific operating voltage.