What this part is and where it fits
The Infineon IPB240N04S41R0ATMA1 is a 40 V N-channel OptiMOS power MOSFET in a surface-mount PG-TO263-7-3 package. It carries a continuous drain rating of 240 A at 25°C case temperature and a maximum Rds(on) of 1 mOhm at 10 V gate drive. AEC-Q101 qualification and a junction temperature range of -55°C to 175°C make it a direct fit for automotive under-hood environments. The 221 nC gate charge at 10 V means the gate driver needs to source enough peak current to hit the switching speed the application requires; plan the driver stage accordingly.
Package and mounting
PG-TO263-7-3 footprint matches standard D2PAK land patterns. The six leads plus the large tab distribute the 240 A current path; the tab is the drain connection and the primary thermal path. Surface-mount reflow profile follows standard lead-free solder profiles. The 175°C junction rating allows operation in high-ambient under-hood locations, but the tab solder joint temperature must stay within the PCB laminate rating.
Lifecycle and sourcing posture
The IPB240N04S41R0ATMA1 carries an active lifecycle status with ROHS3 compliance. No last-time-buy or phase-out notice is on record. For dual-sourcing or supply resilience, the Infineon OptiMOS family includes other 40 V N-channel parts in the same footprint — verify the specific Rds(on) and current tier against your load budget before substituting.