Heavy Duty, Type TH Spec-Setter Saftey Switch Cartridge Fuse, Type TH Switches Designed for applications where saftey, high performance and continuity of service are required. Amperage : 100A Voltage : 480/600V AC, 250V DC Poles: 3 Enclosure: N3R Non-Fused Uses Type TC aluminum hubs Dimensions : 9-7/8" wide 17-1/2" high 5" depth