This is an NFC fuse cartridge for TeSys GS load break switch fuse devices. It is an aM fuse link that protects against magnetic overcurrents only and is suitable for motor protection. The rated current is 100A and the maximum rated voltage is 500VAC. It is a cylindrical fuse (NFC type), the dimensions are 22mm x 58mm. It does not have a striker that indicates when the fuse is blown. This fuse is sold as a set of 10 pieces.