Key ratings for the switching design
Gate charge is 21 nC at 5 V, so the drive stage does not need a high-current gate driver for moderate switching frequencies.
Package and footprint — TO-251 (I-PAK)
The STD60NH03L-1 comes in a TO-251-3 package with short leads, also called I-PAK. This footprint is common in automotive and industrial modules where through-hole reliability is preferred over surface-mount for high-current paths. The supplier device package is I-PAK, which is the same as TO-251.
