From the ManufacturerMersen A6D100R 600V 100A Rk1 Time Delay Fuse, UL Power Fuse, Class Rk1, Time Delay Characteristics, 600 Vac, 100 Ampere, Interrupting Rating 200 Kiloampere, Blade Terminal, Diameter 1-5/16 Inch, Length 7-7/8 Inch, Approval Ul 248-12, Csa C22.2, Amp-Trap 2000[R] Brand, A6D Model, Current Limiting, Fiberglass Tube