This is an NFC fuse cartridge for TeSys GS load break switch fuse devices. It is a gG fuse link that protects against thermal overload and magnetic overcurrents and is used in standard applications. 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.