For a given load current, this resistance directly sets the I²R dissipation — at 5.5 A the loss is about 11.4 W, which the 110 W maximum power dissipation at the case can handle with adequate heatsinking. Gate charge is 17 nC at 10 V, a low figure for a 600 V device of this current rating. Together with the low gate charge, this part is suited for hard-switched topologies where fast transitions reduce turn-on and turn-off losses.
Package and mounting — DPAK for surface-mount assembly
The STD15N60M2-EP comes in the DPAK (TO-252) surface-mount package, with two leads and a tab that serves as the drain connection.