AMP-TRAPĀ® Motor protection fuse. Ferrule mounting for standard clips and interchangeability with other brands of fuses. Current-limiting for superior equipment protection. Metal embossed catalog number and manufacturing date for lasting identification. Hookeye for non load-break isolation by hookstick. Blown-fuse indicator to give positive identification of open fuse. Silver-plated copper contact material. These fuses come with a 3 (size D) inch diameter barrels with ferrules and are mounted in spring reinforced clips.