The Infineon SPA15N60CFDXKSA1 is an N-channel CoolMOS power MOSFET from the CoolMOS series, built on a charge-compensation technology that keeps Rds(on) low for the voltage class. Rated for 650 V drain-source and 13.4 A continuous at 25°C case temperature, it targets high-voltage switched-mode power supplies, PFC stages, and flyback converters where low conduction loss and fast switching matter.
That means Infineon still manufactures it for existing production builds, but it is no longer qualified into new projects. For a new design, the procurement move is to identify a pin-compatible replacement within the CoolMOS family before the next prototype spin. The official successor is not listed in the record, so cross-referencing against other 650 V CoolMOS N-channel devices in the same TO-220 Full Pack footprint is the practical path.
That is the number to use for conduction loss calculations at full load. Gate charge totals 84 nC at 10 V, which sets the drive current requirement for the gate driver — a 1 A driver charges the gate in roughly 84 ns, though practical switching speed also depends on the driver's source/sink impedance and the external gate resistor. Input capacitance is 1820 pF at 25 V drain-source, a moderate figure that keeps the Miller plateau manageable in hard-switched topologies.