600 V, 14 A N-channel in a full-pack through-hole — what it is
The STMicroelectronics STF15NM60N is a 600 V, 14 A N-channel power MOSFET built on the MDmesh™ II technology — a multi-drain mesh layout that cuts on-resistance without sacrificing switching speed.
The STF15NM60N is listed as obsolete. The TO-220FP footprint is common across many 600 V N-channel MOSFETs, but the full-pack package limits the field — most alternatives are in the standard TO-220 with an exposed metal tab that requires an insulator.
The 600 V drain-source breakdown voltage gives 80% derating margin on a 400 V DC bus (typical PFC output) — comfortable for universal-input flyback converters. The 4 V gate threshold at 250 µA drain current is on the higher side for logic-level drive — the datasheet specifies 10 V gate drive for the rated Rds(on), so a 12 V bias rail or a dedicated gate-drive IC is expected, not a 5 V PWM output from a controller.
