At 1 A load current, expect roughly 3.25 W dissipation from Rds(on) alone — the 45 W package power limit gives headroom, but the junction temperature rise from that dissipation at 25 °C ambient needs a copper area on the drain tab to stay within the -55 to 150 °C junction range. Switching losses stay low even at moderate frequencies, and the drive circuit can be a simple logic-level gate driver without a booster stage. Input capacitance measures 102 pF at 100 V drain-source — a small number that keeps the Miller plateau short and the switching edges clean.
Package and mounting — DPAK with tab soldered
The STD3LN80K5 comes in the TO-252-3 (DPak) surface-mount package, which is a 2-lead plus tab outline.
Temperature range — rated for industrial and automotive environments
That covers the full industrial temperature band and extends into the under-hood automotive range. The 150 °C maximum junction allows the part to handle the self-heating from conduction and switching losses in a warm enclosure without derating prematurely.