600 V, 62 A, 42 mOhm — the switching MOSFET for high-voltage rails
The STW70N60DM6-4: The TO-247-4 package adds a dedicated Kelvin-source pin that separates the power current path from the gate-drive return.
Gate charge and input capacitance — sizing the driver
Total gate charge is 99 nC at a 10 V gate drive. The gate threshold voltage maximum is 4.75 V at 250 µA drain current. A 10 V gate drive is specified for the rated Rds(on).
Thermal and operating envelope
Maximum power dissipation is 390 W at the case temperature Tc — this is the theoretical ceiling with an ideal heatsink. The maximum gate-source voltage rating is ±25 V, providing margin against gate-drive overshoot in hard-switching topologies.
