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 12 A and the maximum rated voltage is 500 VAC. It is a cylindrical fuse (NFC type), the dimensions are 10mm x 38mm. It does not have a striker that indicates when the fuse is blown. This fuse is sold as a set of 10 pieces.