Gate charge and switching speed
Total gate charge is 53 nC at 10 V. For a 100 kHz hard-switched converter the gate drive sees about 5.3 mA average current — within the capability of most bootstrap drivers, but the 3770 pF input capacitance at 40 V drain means the driver must source a peak current of several amps during the miller plateau to keep switching edges clean.
175°C junction — margin above the usual 150°C ceiling
Operating junction temperature spans -55°C to 175°C, 25°C higher than the typical industrial MOSFET. That extra headroom matters in a sealed enclosure or under-hood environment where ambient air reaches 105°C and the heatsink temperature approaches 125°C — the Rds(on) derating at 175°C is roughly 2× the 25°C value, so the 5.2 mOhm at 25°C becomes about 10.4 mOhm at the hot end, which still keeps conduction losses within the 125 W budget at derated current.
Infineon continues to manufacture the OptiMOS N5 generation in the TO-220-3 (PG-TO220-3) package.