100 V N-channel HEXFET® — DPAK power switch
The IRFR540ZTRLPBF: It comes in a surface-mount DPAK (TO-252-3) package with an exposed tab for thermal dissipation to the PCB copper plane.
That 28.5 mOhm figure is specified at 25°C junction — at 125°C the Rds(on) roughly doubles, so the conduction-loss budget in a hot environment should use approximately 57 mOhm as the working value. Total gate charge is 59 nC at 10 V.
Temperature range and thermal limits
It is ROHS3 compliant, meaning no restricted substances above the threshold limits.