45 ns fast recovery in a fully isolated TO-220
The STTH8R06FP is an 8 A, 600 V fast-recovery epitaxial diode from STMicroelectronics with a reverse recovery time (trr) of 45 ns — fast enough for hard-switched PFC boost stages, output rectification in flyback converters, and snubber clamping where recovery charge drives EMI and switching loss.
Conduction loss and thermal budget
Forward voltage is 2.9 V maximum at 8 A — at full rated current the conduction loss is 23.2 W, so the heatsink must keep the junction below the 175 °C maximum rating. Reverse leakage is 30 µA at 600 V — negligible for static power dissipation, but worth checking at elevated junction temperature where leakage doubles per 10 °C rise.
Active lifecycle and compliance
ROHS3 compliant — no exemptions for lead in solder or other restricted substances under the current EU directive.