40 V, 120 A automotive power switch
The IPB120N04S4L02ATMA1: It is housed in a PG-TO263-3 (D²Pak) surface-mount package with the tab as the drain connection — the large copper pad under the tab sets the thermal resistance to the board. AEC-Q101 qualification and the -55 to 175 °C junction temperature range place it squarely in automotive under-hood and chassis-domain applications: engine management, electric power steering, DC-DC converters, and high-current load switching.
1.7 mOhm Rds(on) — conduction loss budget
The 1.7 mOhm Rds(on) at 100 A and 10 V sets the conduction loss floor. The 158 W package power dissipation rating at case temperature requires adequate PCB copper area on the drain tab.
Gate charge and switching speed
Total gate charge is 190 nC at 10 V, with an input capacitance of 14560 pF at 25 V drain. The gate driver's supply decoupling must be sized for the charge transfer each cycle.
ROHS3 compliant. No official successor or second-source cross-reference is listed — the part is sole-sourced to Infineon's OptiMOS line.
