800 V N-channel in a fully isolated through-hole package
That saves a BOM line and assembly step in through-hole power supplies.
At 2.5 A the conduction loss is I²R = 22 W — right at the 20 W power dissipation limit, so the thermal design needs a heatsink with good airflow or forced convection. Gate charge is 9.5 nC at 10 V; that's low enough that a simple PWM controller with a totem-pole driver can switch it cleanly at 65–100 kHz without excessive drive losses. Input capacitance is 130 pF at 100 V drain-source — a small number that keeps the switching node capacitance low in a flyback primary, reducing turn-on losses and ringing on the drain node.
Active production, ROHS3, and the full-pack advantage
The TO-220 Full Pack package is the same 3-pin through-hole footprint as a standard TO-220, but the exposed metal tab is at drain potential and fully isolated from the case — you can mount it with a single screw and a dab of thermal grease, no mica washer.
Where it fits — flyback primary, auxiliary supply, PFC boost
The 800 V rating and 2.5 A current make this a natural fit for the primary-side switch in off-line flyback converters up to about 30–40 W, auxiliary power supplies for industrial controls, and single-stage PFC boost stages where the voltage stress stays under 600 V. The full-pack isolation simplifies heatsinking in metal-enclosed equipment where the heatsink is grounded to the chassis.