Gate charge and driver budget
The IPP120N04S402AKSA1: Total gate charge is 134 nC at 10 V. Input capacitance is 10740 pF at 25 V drain bias.
Temperature range and environment
The 158 W maximum power dissipation at case temperature assumes an infinite heatsink; real-world derating follows the datasheet's thermal impedance curve. The TO-220-3 through-hole package (PG-TO220-3-1) allows bolting to a chassis or heatsink with a thermal pad or grease.
