600 V CoolMOS P6 in a fully isolated TO-220
Those numbers are modest for a 600 V device — the P6 family targets a balance between low Rds(on) and manageable switching losses. A 19 nC Qg means the gate driver sees a light load, so a standard 1 A driver can switch it in the tens of nanoseconds. The 877 pF Ciss keeps the Miller plateau short, which helps in hard-switching topologies like active-clamp flyback or LLC half-bridge where dead-time timing matters.
Temperature range and thermal design
The 31 W dissipation limit at case temperature is the package-level ceiling — a practical design with a reasonable heatsink will run well below that. The threshold voltage spec (4.5 V max at 320 µA drain current) means 10 V gate drive is the correct choice to achieve the rated 380 mOhm; at 5 V drive the Rds(on) will be significantly higher, so budget the gate supply accordingly.
The CoolMOS P6 series is a mature, widely used platform, so second-sourcing risk is low.