SiC Schottky — zero recovery, no trade-off
The STPSC20065W is a 650 V, 20 A silicon-carbide Schottky diode from STMicroelectronics, part of the ECOPACK®2 series.
20 A average, 650 V blocking — sizing the power stage
Rated for 20 A average rectified current (Io) and 650 V DC reverse voltage (Vr). The forward drop maxes at 1.45 V at 20 A, so conduction loss at full load sits around 29 W — plan the heatsink accordingly. The DO-247 through-hole package handles the dissipation if you bolt it to a properly sized heatsink with good thermal interface.
175°C junction — margin for the hot end
That 175°C upper limit gives you headroom in a motor-drive cabinet or a sealed power supply where ambient can hit 85°C and the diode is the hottest component on the board. Reverse leakage is 300 µA at 650 V — a nonissue at rated voltage, but worth derating if you push the junction near the limit.
