250 V, 44 A — where this HEXFET fits
The 310 W power dissipation capability at the case tells you this part needs a heatsink — the TO-247AC package with a screw-mount tab is designed for a thermal interface to a metal chassis or extruded aluminium sink.
Gate drive budget — 110 nC at 10 V
Total gate charge is 110 nC at 10 V gate drive. A 1 A gate driver can charge that gate in about 110 ns, allowing switching frequencies up to roughly 100 kHz before gate-drive losses become significant. The 4560 pF input capacitance at 25 V drain-source confirms the driver must source a healthy peak current for fast edges. The 5 V threshold at 250 µA drain current is a maximum — the part turns on fully with 10 V drive, and the gate is rated for ±30 V maximum, so a standard 12 V or 15 V gate drive rail is safe.
ROHS3 compliant — lead-free solderable.
Swap it in the field
Through-hole TO-247-3 package — three leads and a mounting tab. No fine-pitch soldering, no hot-air station. On site, with a soldering iron and a screwdriver, you can pull the old device and drop this one in. The tab is the drain; the gate and source are the two smaller pins. Orientation is obvious from the package outline — the tab is on one side, the pins on the other. Is it in the kit? It should be, if you service 250 V bus equipment.