The STMicroelectronics STTH1R02ZFY is a 200 V, 1 A fast recovery rectifier in a SOD-123F surface-mount package, qualified to AEC-Q101 for automotive applications. Its 32 ns reverse recovery time (trr) keeps switching losses low in DC-DC converters, freewheeling diodes, and snubber circuits where the recovery transient would otherwise radiate EMI or overheat the junction.
AEC-Q101 and 175°C junction — the thermal and reliability ceiling
Leakage current at 200 V reverse bias is 500 nA, which is negligible at room temperature but rises with junction temperature — factor the leakage power into the thermal budget if the diode operates near its voltage rating at high ambient.