0.65 mOhm at 100 A — the conduction-loss floor
The IRF40SC240ARMA1: The 458 nC total gate charge at 10 V sets the drive current needed for the target switching frequency.
Package and thermal — the D²Pak with tab
The IRF40SC240ARMA1 comes in a TO-263-7 (D²Pak) with six leads plus the exposed tab, supplier package code PG-TO263-7. Surface-mount assembly: the tab is the drain node, and the six leads fan out the gate and source connections.
