Product DescriptionMersen Amp-Trap 2000 SmartSpot A2D-R fuses feature a visual open fuse indicator and provide IEC Type 2 No Damage protection to main, feeder, and branch circuits for all types of loads. With time-delay characteristics for handling harmless in-rush currents, current-limiting ability, A2D-R fuses give excellent protection for all your applications. Solid state SmartSpot visual blown fuse indicator. 600VAC and 600VDC dual rated Easy 2-to-1 selectivity for prevention of nuisance shut downs and "black outs" Rejection-style design prevents replacement errors (when used with recommended fuse blocks) High-visibility orange label gives instant brand recognition Reduced inventory by taking the place of class RK5, K, and H fuses Metal-embossed date and catalog number for easier traceability and lasting identification Fiberglass body provides dimensional stability in harsh industrial settings Applications: Motors, safety switches, transformers, branch circuit protection, disconnects, control panels, and all general-purpose circuits. 300 ampere current rating. Measure 2-1/16-inches diameter by 8-5/8-inches length. Approvals: UL listed to standard 248-12 file E2137, DC listed to UL standard 248, CSA certified to standard C22.2 No. 248.12.From the ManufacturerMersen A2D300R 250V 300A Rk1 Time Delay Fuse, UL Power Fuse, Class Rk1, Time Delay Characteristics, 250 Vac, 300 Ampere, Interrupting Rating 200 Kiloampere, Blade Terminal, Diameter 2-1/16 Inch, Length 8-5/8 Inch, Approval Ul 248-12, Csa C22.2, Amp-Trap 2000[R] Brand, A2D Model, Current Limiting, Fiberglass Tube