IAUTN04S7N004ATMA1

IAUTN04S7N004ATMA1 is an Infineon OptiMOS 7 40 V N-channel automotive MOSFET in the PG-HSOF-8 (TOLL) leadless power package, tape and reel — the middle code of the 40 V TOLL group launched in 2026. It pairs a 0.38 mΩ maximum RDS(on) with a 350 A rating for high-current 12 V and 48 V switching: mild-hybrid DC-DC conversion, power steering and braking drives, and battery disconnect switches. The trade is explicit: at 200 A, conduction loss is about 15 W against roughly 9.6 W for the 0.24 mΩ N003 code, so this part fits designs whose thermal path can absorb the difference. All three 40 V TOLL codes share the 10 x 12 mm footprint, so re-selecting between them is a component change, not a layout change. Selection advice: choose the N004 as the balanced default; move up to the N003 for loss-critical loads, or to the N005 where resistance can rise further. Infineon lists the part as active and preferred, with supply committed at least until 2038. Parameters verified against Infineon documentation.