600V, 5A N-Channel in MDmesh™ — what the ratings mean for your BOM
The STD5NM60-1: The 600V drain-source breakdown voltage gives it headroom for universal-input offline flyback converters, PFC stages, and auxiliary supplies where the DC bus sits around 400V and switching transients can ring well above that. Maximum on-resistance is 1Ω at 2.5A with a 10V gate drive. That 1Ω figure is the ceiling at 25°C junction — expect it to roughly double at 150°C junction, so the conduction loss at full load in a hot enclosure is higher than the datasheet typical suggests. The 18nC total gate charge at 10V means the gate driver only needs to source about 18nC per switching cycle; at 100kHz switching frequency that works out to roughly 1.8mA average drive current, easily handled by a standard gate-driver IC.
Thermal budget and package — through-hole I-PAK
Maximum power dissipation is 96W at case temperature 25°C, but that derates quickly as the case heats up. In practice, with the I-PAK (TO-251AA) through-hole package, the junction-to-ambient thermal resistance is high — expect the 96W figure to be reachable only with a heatsink bolted to the tab or a good copper pour on the PCB. The through-hole leads handle moderate mechanical stress and are easier to hand-solder or rework than surface-mount packages. Operating junction temperature range is -55°C to 150°C, covering industrial and automotive under-hood ambient conditions. The 400pF input capacitance at 25V drain-source means the gate drive sees a moderate capacitive load — a 10Ω gate resistor gives a roughly 4ns RC time constant, fast enough for most hard-switching topologies without excessive ringing.