120 V Schottky in a low-profile SlimSMAW package
The VSS8D2M12-M3/I is a 120 V, 1.9 A Schottky rectifier from Vishay's eSMP® and TMBS® series, housed in the SlimSMAW (DO-221AD) surface-mount package. It targets applications requiring a low forward voltage drop — 600 mV typical at 1 A — and a high junction temperature ceiling of 175 °C, making it a fit for power supplies, DC-DC converters, and reverse-polarity protection in industrial and automotive-adjacent environments.
What the 175 °C junction rating buys you
The 175 °C maximum junction temperature places this part above the standard 150 °C Schottky tier. That headroom matters when the diode sits near a hot inductor or in a sealed enclosure with limited airflow — the thermal margin reduces the need for oversized copper pads or forced cooling. At 120 V reverse and 1.9 A average forward current, the part handles 48 V bus rails with derating to spare. The 250 µA reverse leakage at 120 V is typical for a 120 V Schottky at 25 °C; expect it to rise with temperature, so budget for increased dissipation if the ambient runs above 85 °C.
Package and footprint — SlimSMAW vs standard SMA
The SlimSMAW (DO-221AD) package is a flat-lead, low-profile variant of the SMA family. It shares the same 2.6 mm body width as a standard SMA but sits lower on the board — roughly 0.85 mm tall versus 2.0 mm for a typical SMA. Mounting is surface-mount per the DO-221AC / SMA Flat Leads case outline.