150V, 35A N-channel — the workhorse for mid-voltage switching
The IRFB5615PBF: It comes in a through-hole TO-220-3 package, the standard for board-mounted power stages where a heatsink is part of the assembly.
On-resistance and gate drive — sizing the switching loss
Maximum Rds(on) is 39 mOhm at Vgs = 10 V and Id = 21 A. Gate charge totals 40 nC at 10 V.
Thermal and temperature — where it lives on the board
Junction temperature range is -55°C to 175°C, which covers automotive under-hood and industrial motor-drive environments. Maximum power dissipation is 144 W at case temperature 25°C — the TO-220 tab must be bolted to a heatsink to stay below the 175°C limit at high current.
Sourcing and lifecycle — still a current-production part
It is ROHS3 compliant.