650 V N-channel MOSFET in DPAK — what this part is
It is built on ST's MDmesh vertical structure, which delivers a good balance of low on-resistance and fast switching for high-voltage applications.
The 650 V Vdss rating places this part in the standard high-voltage MOSFET class for offline AC-DC converters operating from rectified 230 VAC or universal mains. Input capacitance of 270 pF at 100 V drain-source is modest, keeping the switching node capacitance low for resonant or quasi-resonant topologies.
Package and mounting — DPAK (TO-252-3)
The STD7N65M2 is supplied in the DPAK (TO-252-3) surface-mount package, with two leads plus a drain tab. For the full 60 W power dissipation rating, the tab must be soldered to a sufficient copper pad area on the board, typically 1 to 2 square inches of 2 oz copper, with thermal vias to inner layers.
It is RoHS compliant per the standard STMicroelectronics declaration.