100 V, 80 A N-channel — the thermal budget sets the real current
The 15 mOhm on-resistance at 40 A, 10 V drive defines the conduction loss floor — at 80 A the I²R loss is 96 W before you add switching losses, so the 300 W power dissipation ceiling is real headroom only with a substantial heatsink and forced airflow.
Gate charge and drive current — what 182 nC means for the gate driver
Total gate charge is 182 nC at 10 V. At 100 kHz switching frequency the average gate drive current is 182 nC × 100 kHz = 18.2 mA, well within a standard gate driver's capability. The input capacitance of 5500 pF at 25 V drain-source sets the Miller plateau slope — a driver with at least 2 A peak source/sink keeps the switching edges clean and avoids partial turn-on during the Miller region.
175 °C junction — rated for the hot end of the motor drive
The D2PAK (TO-263) surface-mount package lets the exposed tab solder directly to a copper island on the PCB — the thermal resistance to ambient depends on that copper area, not the package itself.