2.2 mOhm at 90 A — the conduction-loss floor
Its headline spec is a maximum on-resistance of 2.2 mOhm at Vgs = 10 V and Id = 90 A — the lowest Rds(on) in the 40 V OptiMOS 3 portfolio. For a synchronous buck converter or a motor-drive H-bridge, that 2.2 mOhm floor translates directly into conduction loss: at 50 A, the I²R dissipation sits at roughly 5.5 W, well within the 167 W package limit.
175 °C junction — headroom for harsh environments
That extra 25 °C matters in under-hood automotive, industrial motor compartments, or downhole tools where the ambient near the heatsink can push junction spikes past 150 °C.
Gate charge and input capacitance — the driver budget
Total gate charge Qg is 166 nC at Vgs = 10 V, with an input capacitance Ciss of 13000 pF at Vds = 20 V. A 166 nC gate charge at a 100 kHz switching frequency draws 16.6 mA average from the gate driver — a standard 2 A gate-driver IC handles that comfortably, but the 13 nF input capacitance means the driver must source a peak current of several amps during the Miller plateau transition. The PG-TO263-3-2 package (D²Pak) exposes a large copper tab on the bottom for heatsinking; the thermal pad area on the PCB sets the effective RthJA.
Active lifecycle and compliance
It carries ROHS3 compliance, meaning no restricted phthalates or halogenated flame retardants in the package. The series is OptiMOS™ 3, a mature 40 V trench-technology node that has been in volume production for years; the date-code traceability from Infineon's fabs is well-documented, and the laser-etched markings on the TO-263 body are consistent across production lots — a useful check when vetting independent-distributor stock.