Detailed Product Description NT fuseFeature1)pure copper/silver & quartz sand & high strength ceramic2)Rated voltage:500/690V3)Rated current:315,355,400,425,500,630A Application: The series of fuse links are mainly used in AC50Hz, rated voltage up to 690V, rated current up to 1250A and for protecting electrical equipment from overloading and short-circuit. It can reliably break the min fuion ...