P-channel power switch in a D-Pak
The IRFR5305TRPBF is a P-Channel enhancement-mode MOSFET from Infineon's HEXFET® series, housed in a D-Pak (TO-252) surface-mount package. The 65 mOhm max on-resistance at 16 A, 10 V gate drive sets the conduction-loss floor for a load switch or low-side inverter leg.
Gate drive and switching budget
Total gate charge is 63 nC at 10 V — a 10 V gate-drive rail is needed to hit the rated Rds(on). Input capacitance is 1200 pF at 25 V Vds. For a 100 kHz switching frequency, the average gate-drive current is about 6.3 mA, which a standard gate-driver IC handles without a booster stage. The ±20 V Vgs(max) rating gives margin for gate-drive overshoot in hard-switched topologies. The 4 V typical gate threshold at 250 µA drain current means the device is fully off below 4 V gate-to-source.
Thermal and mechanical fit
Junction temperature range is -55°C to 175°C, suitable for automotive under-hood and industrial motor-drive environments where ambient heat soaks the PCB. The D-Pak (TO-252) footprint shares the same land pattern as the standard DPAK, so a board already laid out for an N-channel DPAK can accept this P-channel part with only a gate-drive polarity change.
Lifecycle and sourcing
It is ROHS3 compliant.
