Dual current rating — board vs heatsink
The BSC886N03LS G: Continuous drain current is rated 13 A at 25 °C ambient (Ta) and 65 A at 25 °C case (Tc). The Ta rating reflects the 2.5 W power dissipation limit in free air; the Tc rating of 39 W dissipation requires a thermal pad or heatsink on the PG-TDSON-8 package to reach the silicon limit.
The PG-TDSON-8 (8-PowerTDFN) surface-mount package has an exposed drain pad for thermal vias to the PCB ground plane.
