80 V, 4 mOhm — what that buys in an automotive power stage
The STH145N8F7-2AG is an STripFET F7 N-channel power MOSFET rated 80 V drain-to-source and 90 A continuous at 25 °C case temperature. AEC-Q101 qualified, so the lot traceability and testing match production automotive programs.
Gate charge and switching — sizing the driver
Total gate charge is 96 nC at 10 V. At a 100 kHz switching frequency that translates to 9.6 mA average gate drive current — a standard 2 A totem-pole driver handles it with margin. The 6340 pF input capacitance at 40 V drain bias means the driver sees a capacitive load; a 10 Ω to 22 Ω series gate resistor controls the ringing without slowing the edge below the target dead-time window.
175 °C junction — thermal headroom for under-hood loads
Operating junction temperature spans -55 °C to 175 °C, wider than the standard 150 °C automotive limit. For a 200 W max dissipation part, that extra 25 °C headroom matters when the MOSFET sits near an exhaust manifold or inside a transmission control module where ambient air already runs 105 °C. Derate the 90 A rating above 25 °C case per the datasheet curve — at 100 °C case the continuous current drops to roughly 65 A.
The STripFET F7 family is a current-generation trench process, so the die supply and assembly capacity are stable. ROHS3 compliant.