The STMicroelectronics STPS1L30AFN is a 30 V, 1 A Schottky rectifier in the DO-221AC SMA Flat Leads package. Its key parametric is a forward voltage of 395 mV at the full 1 A rated current, which keeps conduction losses low in low-voltage rails. The fast recovery characteristic — ≤500 ns above 200 mA — makes it suitable for switching power supplies where reverse-recovery charge matters, unlike a standard Schottky that is already majority-carrier fast. This part targets secondary-side rectification in AC-DC converters, freewheeling diodes in DC-DC stages, and polarity protection in battery-powered equipment where every millivolt of drop counts.
That means STMicroelectronics has stopped production, and no further factory orders are accepted. The 150°C junction temperature rating is standard for this class and does not limit replacement options.
Package and mounting — SMA Flat Leads
The DO-221AC SMA Flat Leads package is a low-profile surface-mount form factor. The leads are flat rather than formed into a J-bend or gull-wing, which reduces the package height above the board. This is a standard footprint for automated pick-and-place assembly.