Schottky rectifier for 12 V / 24 V rails
The STPS2150AFN is a 150 V, 2 A Schottky rectifier from STMicroelectronics, housed in a low-profile SMA Flat Leads package. Its Schottky construction delivers a forward voltage of 820 mV at the full 2 A rated current, keeping conduction losses manageable in a compact footprint.
Procurement must go through independent distribution or the surplus market.
Ratings that define the fit
The 150 V reverse voltage rating suits it for 12 V and 24 V DC rails with margin for transients. At 2 A average rectified current, it handles moderate loads like secondary-side rectification in a 15 W to 30 W offline supply. The 820 mV forward drop at 2 A is typical for a 150 V Schottky in this current class — expect slightly higher drop at elevated junction temperature, so derate the output current if the ambient is above 85°C.
The DO-221AC SMA Flat Leads package is a surface-mount, low-profile variant of the standard SMA. It shares the same 2-pin footprint as a standard SMA but with flat leads for better solder wetting and visual inspection.