20 V, 1 A Schottky — low forward drop for tight rails
The STPS120M is a 20 V, 1 A Schottky rectifier from STMicroelectronics in the tiny DO-216AA STmite surface-mount package.
ROHS3 compliant per.
490 mV Vf — the conduction loss floor
At 1 A forward current the maximum forward voltage is 490 mV. That is the conduction loss at rated current; the actual drop will be lower at lighter loads, which helps efficiency in burst-mode or standby circuits. Reverse leakage is 3.9 µA at 20 V — a non-issue for most low-voltage rails but worth checking if the diode sees sustained reverse bias at elevated junction temperature.
STmite footprint — board area trade-off
The DO-216AA STmite package is a small, low-profile surface-mount body.