The STP6NK60Z: Through-hole TO-220-3 package.
Key ratings at a glance
Gate charge totals 46 nC at 10 V — moderate for a 600 V device, meaning the gate driver does not need to be oversized.
Mounting and thermal handling
The TO-220 package is through-hole, so it gets soldered into plated through-holes on the board and typically bolted to a heatsink with a screw and insulating washer. Maximum power dissipation is 110 W at case temperature — that figure assumes an infinite heatsink; real-world dissipation depends on the thermal interface and airflow. The tab is the drain, so the heatsink must be electrically isolated or the system ground must tolerate drain potential.