Bussmann S-20 Time Delay Plug Fuse, Pack of 1 Quantity: 4 Pack 20A Type S Plug Fuse Non Tamp, Time Delay Fustat Heavy Duty Size Rejecting Plug Fuse Use to protect critical motor circuits or motors that cycle on/off frequently Features non-interchangeable body An industrial/commercial grade product with dual-element construction This fuse threads into SA adaptors Heavy Duty Size Rejecting Plug Fuse Use to protect critical motor circuits or motors that cycle on/off frequently Features non-interchangeable body An industrial/commercial grade product with dual-element construction This fuse threads into SA adaptors