Dual Schottky in a TO-247 — the common-cathode workhorse
The STPS61L45CW is a dual Schottky rectifier from STMicroelectronics, wired as a common-cathode pair inside a TO-247-3 through-hole package.
560 mV forward drop at 30 A — the conduction loss number
The maximum forward voltage is 560 mV at 30 A per diode. That's the figure to plug into your thermal budget: at full rated current, each die dissipates about 16.8 W before any derating. The 1.5 mA reverse leakage at 45 V is typical for a 45 V Schottky at room temperature — expect it to climb with junction temperature, so keep the heatsink sized to stay well below the 150°C max junction temperature.
