What this OptiMOS N-channel does
The Infineon BSC030N04NSGATMA1 is an N-channel MOSFET from the OptiMOS series, rated for 40 V drain-to-source and 3 mOhm max on-resistance at 50 A with a 10 V gate drive. It handles 100 A continuous at the case temperature, making it a fit for high-current switching in automotive and industrial power stages — motor drives, battery management, and DC-DC converters. The PG-TDSON-8-1 package (8-PowerTDFN) is a surface-mount footprint common in compact power layouts.
Key ratings for the BOM decision
The 100 A continuous drain rating at case temperature is package-limited — in practice, the 2.5 W at ambient and 83 W at case dissipation limits tell you the real current depends on heatsinking. On a typical PCB without a heatsink, you are derated well below 100 A; with a good thermal path to a copper plane or external heatsink, it can deliver. The -55°C to 150°C junction temperature range covers automotive under-hood and outdoor industrial enclosures.
Sourcing and lifecycle
The BSC030N04NSGATMA1 is listed as Active with ROHS3 compliance. For production BOMs, this means no near-term obsolescence risk.
