The STU6N60M2: The 600 V rating provides comfortable derating headroom for 380 V DC bus rails in flyback converters and PFC stages — a 200 V margin above the nominal bus voltage is a standard design practice for transient survival.
Gate drive and switching — 13.5 nC Qg keeps the driver cool
Total gate charge is 13.5 nC at 10 V. Input capacitance Ciss is 232 pF at 100 V drain bias, and the gate threshold voltage is 4 V maximum at 250 µA drain current.
Through-hole IPAK — vibration-tolerant mounting for harsh environments
The TO-251 (IPAK) package with short leads is a through-hole variant that occupies less board area than a TO-220 while still providing a solder-joint anchor for high-vibration assemblies. The supplier device package is TO-251 (IPAK), and the mounting type is through hole.
No official second-source or successor is listed on the record; for dual-source planning, cross-reference against other 600 V N-channel IPAK MOSFETs from the same voltage class.