650 V N-channel in a full-pack — the BOM simplification angle
The STF31N65M5: It comes in the TO-220-3 Full Pack (TO-220FP) — the fully isolated package that eliminates the insulating washer and thermal compound between the tab and heatsink, saving a BOM line and assembly step in through-hole power stages.
Conduction and switching — what the parametric set tells you
The 45 nC total gate charge at 10 V is moderate for the 650 V / 22 A class, keeping gate-drive power manageable in hard-switching topologies up to the 100 kHz range. Input capacitance Ciss is 816 pF typical at 100 V drain bias — a moderate figure that, combined with the gate charge, gives a reasonable switching figure-of-merit (Rds(on) × Qg) for this voltage class. The maximum gate threshold voltage is 5 V at 250 µA drain current, so the 10 V drive level provides solid overdrive for minimum on-resistance.
It is ROHS3 compliant.