800 V CoolMOS CE — the isolated TO-220 for offline power
The Infineon IPA80R1K0CEXKSA2 is an 800 V N-channel MOSFET from the CoolMOS™ CE series, built on a charge-compensation superjunction structure that cuts the on-resistance versus a planar device. The 800 V drain-source rating puts it squarely in offline flyback converters, PFC boost stages, and auxiliary power supplies where the bus sits at 400 VDC or higher.
950 mOhm Rds(on) — what it buys the switching stage
For a 800 V class part, 950 mOhm is a moderate on-resistance, not the lowest in the CoolMOS family. The input capacitance measures 785 pF at 100 V drain-source — light enough that the gate driver doesn't need a lot of muscle. If you are sizing the primary FET for a 30–60 W offline supply, this part lands in the sweet spot: the conduction loss at 1–2 A RMS is a few watts, and the switching loss stays low enough that a small heatsink works.
The CoolMOS CE series has broad portfolio coverage, so if you need a different Rds(on) or current rating later, the pin-compatible siblings in the same TO-220 Full Pack footprint are straightforward swaps.
TO-220 Full Pack — rework and thermal notes
The PG-TO220-FP is a through-hole full-pack with a fully isolated plastic body. There is no exposed metal tab, so no insulating pad needed against the heatsink — a time-saver on the assembly line. The thermal path goes through the plastic to the back of the package, which adds thermal resistance compared to a standard TO-220 with a tab. At 32 W max dissipation, you need to derate if the ambient is above 25°C. For rework: the leads are tin-plated and solder easily; the plastic body handles standard wave-solder profiles.