Eaton Bussmann series FWP high speed fuse, 250 Vac/dc, 500A RMS, 200 kAIC Vac, 50 kAIC at 700 Vdc, Non Indicating, High speed fuse, Blade end X blade end

Bussmann Fuse, Semiconductor Fuse, Time Delay Fuse, High Speed Fuse, Class J Fuse, Class T Fuse, Class cc fuse, Class RK1 Fuse, Class RK5 Fuse, Class L Fuse, DC Contactor, Disconnect Switch, Car Fuse, Current Limiting Fuse, HV Fuse, Bussmann Fuse Holder, AC Fuse, DC Fuse
You can ask any Bussmann fuse and fuse cross reference(Littelfuse, Mersen, etc).