600 V, 600 mA N-channel — low-power offline switching
The STQ2LN60K3-AP: The TO-92-3 through-hole package (TO-226-3, formed leads) keeps the board footprint small and suits hand-assembly or low-volume production runs.
The 4.5 Ohm Rds(on) at 10 V gate drive sets the conduction loss floor: at 600 mA the I²R loss sits within the 2.5 W maximum power dissipation at the case. The 12 nC total gate charge at 10 V means a small gate-drive IC or a microcontroller GPIO with a series resistor can switch the MOSFET at tens of kilohertz without excessive drive current — a practical advantage in cost-sensitive auxiliary supplies. Input capacitance is 235 pF at 50 V drain-source, which keeps the switching node capacitance low and helps maintain efficiency in hard-switched topologies.
