100 V, 5 A Schottky — what it delivers
The STPS5H100AFY is a 100 V, 5 A Schottky rectifier from STMicroelectronics, qualified to AEC-Q101 for automotive use. It switches fast — recovery under 500 ns at forward currents above 200 mA — which matters for high-frequency DC-DC converters and freewheeling diodes in motor drives where reverse-recovery losses eat efficiency. Forward voltage sits at 760 mV at the full 5 A rating, so thermal design needs to account for about 3.8 W conduction loss at peak current; the SOD128Flat package's exposed pad helps pull heat into the board copper.
Automotive temperature and qualification
The AEC-Q101 stamp means the part passed the automotive stress tests — HTRB, temperature cycling, humidity bias — so it's production-validated for engine control units, transmission solenoids, and on-board charger rectification. No extra screening needed for Tier-1 builds.
Package and assembly fit
SOD-128 flat profile (SOD128Flat supplier package name) is a low-profile surface-mount package, roughly 4.0 mm × 4.7 mm body. Standard reflow profiles for lead-free solder apply; no special bake required if the reel's moisture barrier bag is intact.
For automotive BOMs that need a dual-source hedge, the STPS5H100AFY is the AEC-Q101 version of the commercial-grade STPS5H100; the automotive suffix locks in the qualification paperwork for PPAP submissions.