Active Schottky for 100 V rails — 3 A continuous, 840 mV Vf
The STPS3H100U: The 175°C maximum junction temperature gives headroom for high-ambient environments like under-hood electronics or industrial power supplies.
Leakage and speed — the standby and switching edges
Reverse leakage is specified at 1 µA at the full 100 V blocking voltage — a tight figure for a 3 A Schottky. In a battery-powered OR-ing or reverse-polarity protection circuit, this leakage contributes directly to the quiescent draw; at 100 V it adds under 100 µW to the standby budget. The speed classification is Fast Recovery ≤500 ns at >200 mA, which for a Schottky is a given — the majority-carrier structure inherently switches faster than that. The spec confirms it is not a slow-recovery or standard-recovery part, so it fits in high-frequency rectification stages like flyback secondary-side or PFC boost diodes where reverse-recovery charge would otherwise cause losses.
Package and board-fit — DO-214AA SMB footprint
The STPS3H100U comes in the DO-214AA (SMB) package, supplier device package SMB. This is a standard surface-mount footprint shared with many 2–5 A Schottky diodes from ST and other manufacturers — the same land pattern accepts the STPS3H100UF (the UF variant with a different package suffix) and many competitive parts. The tape-and-reel and cut-tape options cover both production reels and prototype quantities.