All it has written on it is:
- FC (this I think is the manufacturer,
- 9501
- K3303
Using datasheetcatalogue.com and K330, it returns a number of FETs (K3301, 02, 04, 05), but I do not want to assume that this is what the chip is for.
It was pulled out of an old ATX PSU and had a heat sink of 4"x5" steal plate all to itself.
I have tried google, but it has only return street addresses, phone numbers, and other unrelated links.