650 V switch in a 3.3x3.3 mm footprint
The STL3N65M2: It comes in the PowerFlat™ 3.3x3.3 package — a low-profile, surface-mount package suited for space-constrained offline supplies and auxiliary converters where board height is a constraint.
On-resistance and drive requirements
Input capacitance Ciss is 155 pF at 100 V drain bias — a light load for the gate driver.
Thermal and operating envelope
Maximum power dissipation is 22 W at case temperature — achievable with adequate PCB copper on the PowerFlat drain pad. The 4 V maximum gate threshold at 250 µA ensures the device is fully off below 4 V, typical for logic-level drive.