85 ns trr — the switching-speed anchor for a 1 kV, 8 A boost diode
The STTH810GY-TR is a standard fast-recovery epitaxial diode from STMicroelectronics, rated for 8 A average rectified current and 1000 V repetitive reverse voltage. Its 85 ns reverse recovery time (trr) places it in the fast-recovery class for continuous-current-mode (CCM) power factor correction and output rectification stages where the diode's turn-off loss must stay low enough to avoid thermal runaway in the D²PAK package.
AEC-Q101 and 175 °C junction — built for the engine bay and the high-side rail
The base product number STTH810 covers multiple trr and package variants; the GY suffix identifies the D²PAK (TO-263) tape-and-reel version.
Forward drop and leakage — the thermal budget numbers
Reverse leakage is 5 µA at the full 1000 V blocking voltage, a low figure that helps maintain efficiency in light-load or standby conditions.
The STTH810GY-TR is an active, in-production part. No official pin-compatible second source or successor is listed in the component record; for dual-source planning, a parametric search across 1 kV, 8 A fast-recovery diodes in D²PAK from other major manufacturers is the practical route.