Littelfuse 200-9R-1C-5.5X is a medium-voltage current-limiting fuse from the Powr-Gard family, designed for high-voltage circuit protection in industrial power systems. It features a 200A current rating and 5500V voltage rating with an 80kA interrupting capacity at 5.5kV, housed in a durable single-barrel design with 3-inch diameter and bolt-in connection. The Class R-rated fuse meets stringent industry standards for medium-voltage applications, offering reliable protection for transformers, motors, and capacitor banks in utility and industrial power distribution systems.