What this P-Channel HEXFET does on the board
The Infineon AUIRFR5410TRL is a P-Channel enhancement-mode MOSFET from the Automotive HEXFET® series, qualified to AEC-Q101 for use in powertrain, body electronics, and DC-DC converter applications. It handles a 100 V drain-source voltage and 13 A continuous drain current in a DPAK (TO-252-3) surface-mount package.
The 66 W package limit at the case gives headroom for pulsed loads.
Gate threshold is 4 V maximum at 250 µA, and the recommended drive voltage for minimum on-resistance is 10 V. That's a moderate gate charge — a standard gate driver or even a microcontroller GPIO through a series resistor can switch it at a few tens of kHz without excessive drive loss. For higher frequencies, account for the Qg in your driver's peak current budget.