600 V MDmesh II N-channel in a TO-251 I-PAK
450 mOhm on-resistance and 31 nC gate charge
The 31 nC typical gate charge at 10 V means the gate driver doesn't need to supply a large current pulse, keeping switching losses manageable in a 100 kHz hard-switched topology. Input capacitance is 850 pF at 50 V drain-source, which is moderate for a 600 V device and helps keep the Miller plateau short.
STMicroelectronics lists the STD11NM60N-1 as obsolete. There is no official ST replacement listed in the lifecycle record, so any substitution must be validated against the original design's thermal and switching requirements.
