The 31 W package limit (Tc) leaves headroom for switching transients.
Mounting and thermal — Full Pack advantage
The TO-220 Full Pack (PG-TO220-3-31) has a fully isolated metal tab. That means no mica washer or silicone pad between the device and the heatsink — just thermal compound. The junction-to-case thermal path is direct, and the full-pack construction adds a small thermal resistance penalty versus a standard TO-220, but the assembly time saving on a production line is real.
