Eaton Bussmann series FWP high speed fuse, 700 Vac (UL), 700 Vdc (UL), 690 Vac (IEC), 20A, 200 kAIC at 700 Vac, 50 kAIC at 700 Vdc, Non Indicating, High speed fuse, Ferrule end X ferrule end, Class aR, White, Ceramic