Automotive-grade N-channel MOSFET in DPAK
At 40 A, the voltage drop across the FET is roughly 200 mV, which translates to 8 W of dissipation — within the 70 W package limit but requiring good thermal management via the DPAK's exposed pad. Gate charge is 14 nC at 5 V, so the driver doesn't need to push much current for fast switching. Input capacitance is 1850 pF at 25 V Vds, which is moderate — a typical gate driver with a few ohms of resistance will handle the switching edges cleanly. The 175°C junction rating gives headroom in hot environments like engine bays or sealed enclosures. Derate the 80 A current limit above 25°C per the datasheet's thermal curve.