This system of Neo D-fuse-links is proper to protect cables and electrical wires at a rated voltage of 380V AC and 250V DC. The fusing-indicators, in several colors, allow to show both the rating and the fusion of the cartridge. A suitable gauger must be inserted in the base and the whole device is blocked by means of the screw cap. In this way we have got a non-interchangeability of the fuselinks with others of different currents.