The STP310N10F7: The on-resistance is specified at 2.7 mOhm maximum at 60 A with 10 V gate drive — this is the conduction loss figure that sets the I²R dissipation in high-current paths like synchronous rectifiers, motor-drive half-bridges, and battery isolation switches.
180 A continuous drain — current handling and thermal budget
The 180 A continuous drain rating at Tc=25°C is package-limited by the TO-220-3's thermal resistance; real-world derating applies above 25 °C case temperature.
Through-hole TO-220-3 — mounting and thermal interface
The TO-220-3 through-hole package with a tin-plated copper tab is designed for bolt-down or clip mounting to a heatsink. The tab is electrically common with the drain — insulation is needed if the heatsink is grounded.