The BSC050N04LSGATMA1: ROHS3 compliant, it fits RoHS-sensitive builds without exemption paperwork.
5 mOhm Rds(on) — what it buys in a 40 V power loop
For a 40 V rated part in a PG-TDSON-8-5 surface-mount package, that Rds(on) keeps conduction loss under 1.25 W at 50 A — a strong figure for a synchronous buck converter or a load switch where the duty cycle is high and the thermal budget is tight.
85 A continuous drain — thermal headroom in a small footprint
Rated 85 A continuous drain at case temperature (Tc) and 18 A at ambient (Ta) with a maximum power dissipation of 57 W at the case and 2.5 W in free air.
Gate drive and switching — 47 nC Qg at 10 V
The 47 nC figure means a standard gate-driver IC delivering 1 A peak can switch this MOSFET at roughly 100 kHz with acceptable switching losses. Drive voltage is specified for both 4.5 V and 10 V; at 4.5 V the Rds(on) will be higher than the 5 mOhm at 10 V, so confirm the driver rail before committing the BOM. The 2 V threshold maximum at 27 µA ensures the part turns on cleanly with logic-level gate signals.
Package and footprint — PG-TDSON-8-5
Supplied in the 8-lead PowerTDFN package (PG-TDSON-8-5), surface-mount with an exposed thermal pad. The package supports the 85 A drain rating when the pad is properly soldered to the PCB copper pour.