600 V, 10 A — the power-stage workhorse in an isolated package
The STF12NM60N is an N-Channel MOSFET from the MDmesh™ II series, rated at 600 V drain-source and 10 A continuous drain, in a TO-220 Full Pack (TO-220FP) through-hole package.
410 mOhm on-resistance, 30.5 nC gate charge — switching loss budget
Gate charge is 30.5 nC at 10 V; input capacitance is 960 pF at 50 V.
STMicroelectronics lists the STF12NM60N as Obsolete.
