The BUZ73AH3046 is listed with an active product status.
200 V, 5.5 A — where this fits on the board
Think offline flyback primary switch, DC-DC converter input stage, or a motor pre-drive where the bus sits around 48–120 V. The 600 mOhm max Rds(on) at 10 V gate drive means conduction loss is manageable up to a couple of amps; beyond that the I²R heating starts to eat into the 40 W power dissipation budget.
Gate drive and switching edges
The gate threshold is specified at 4 V max with 1 mA drain current, and the recommended drive voltage for minimum Rds(on) is 10 V. That is a standard logic-level gate — a 5 V PWM from a microcontroller will not fully enhance it; you need a gate driver that swings to 10 V. Input capacitance is 530 pF at 25 V drain, which keeps the gate charge low enough that a small driver IC or a discrete totem-pole can switch it at tens of kilohertz without excessive cross-conduction.
TO-220-3 — field-swappable, no hot air needed
The PG-TO220-3-1 package is a standard three-lead through-hole TO-220. It bolts to a heatsink with a single screw, and the leads solder into a PCB or can be crimped into a terminal block in a panel-wiring scenario. For a field repair technician, this is the kind of part you can swap on site with a soldering iron and a screwdriver — no reflow profile, no hot-air station, no ESD bench needed beyond a basic wrist strap. The wide junction temperature range from -55°C to 150°C means it survives the thermal cycling of an outdoor enclosure or an engine bay without derating.