The STPS10H100SFY is an automotive-grade Schottky rectifier from STMicroelectronics, rated for 100 V reverse voltage and 10 A average forward current in a single-diode configuration.
845 mV forward drop at 10 A — the conduction loss number
Forward voltage is specified at 845 mV maximum at 10 A. At full rated current that's 8.45 W of conduction loss — a number the board layout and copper area under the TO-277A pad must handle. The 8 µA reverse leakage at 100 V is typical for a Schottky at this voltage class; expect leakage to rise with junction temperature, so the thermal budget should account for it at the 175°C end.
AEC-Q101 and the 175°C junction — built for the automotive environment
AEC-Q101 qualification is the automotive stress-test standard — it means this diode has passed the temperature cycling, HTRB, and surge-reliability screens that commercial Schottkys skip. The TO-277A (SMPC) package is a surface-mount PowerDFN with a large exposed pad for solder-down to the PCB copper — no through-hole, no heatsink clip needed if the board copper is sized right.
The base product number STPS10 covers a family of 10 A Schottkys; the SFY suffix identifies this specific AEC-Q101 qualified variant in the TO-277A package.