600 V N-channel MOSFET from the MDmesh DM6 family
The STF26N60DM6: Housed in a TO-220-3 Full Pack (TO-220FP) through-hole package, the mounting tab is electrically isolated from the die.
Gate charge is 24 nC at 10 V.
Package and thermal: TO-220FP with isolated tab
The TO-220FP (Full Pack) package has a plastic encapsulation that electrically isolates the mounting tab from the drain. The maximum power dissipation is 30 W at case temperature, which means a properly sized heatsink is required for any continuous operation above a few amps. The through-hole mounting suits point-of-load or bulk-capacitor-laden boards where vibration resistance and mechanical retention matter.
For dual-sourcing, the closest parametric match within the ST MDmesh DM6 family shares the same package and voltage rating — verify gate charge and Rds(on) differences against your switching frequency before substituting.