The STL52N60DM6: Gate charge is 52 nC at 10 V; input capacitance is 2468 pF at 100 V.
Package and rework — PowerFlat 8x8 HV
The pad carries the full 174 W power dissipation rating at case temperature — without a proper via array under the pad, the junction will exceed the 150°C limit well before the current rating is reached. Preheat the board to 100°C, apply flux, and lift with hot air.
Maximum gate threshold is 4.75 V at 250 µA; use 10 V gate drive for rated on-resistance.
