This simplifies mechanical assembly and reduces thermal resistance to the heatsink. Typical applications include power factor correction (PFC) stages, flyback and forward converters, LED lighting drivers, and auxiliary power supplies where 650 V blocking capability and moderate current are required.
The 650 V drain-source breakdown voltage gives the designer headroom for universal-input AC-DC converters (up to 400 V DC bus) plus derating for leakage inductance spikes. Gate charge is 23 nC at 10 V, which is modest — the driver does not need to supply large peak currents, keeping switching losses manageable in hard-switched topologies up to the 100 kHz range. Input capacitance is 440 pF at 100 V Vds, again moderate, so the gate drive power is low. The 3.5 V maximum gate threshold at 210 µA drain current means the device turns on fully with standard 10 V gate drive; it is not a logic-level part, so a 5 V microcontroller output alone will not fully enhance it.
The TO-220 Full Pack (PG-TO220-3-111) is a through-hole package with a fully isolated backside. The mounting hole fits a standard M3 screw, and the package body is rated for a maximum power dissipation of 28 W at the case temperature. For continuous operation near the 7.3 A current limit, a heatsink is required; the 28 W ceiling is the absolute limit at Tc = 25°C, so derate according to the thermal resistance junction-to-case.
This is a standard catalog part in the CoolMOS™ family, widely used across power supply designs. For BOM planning, there is no LTB risk today. There is no official second-source pin-compatible replacement listed; the CoolMOS™ portfolio includes many 650 V devices with different Rds(on) and current ratings, so a drop-in substitute would require checking the specific package and gate drive requirements.