Abstract: A simple and inexpensive low current fuse consists solely of a rigid rod of electrically insulating material and, extending throughout the length of and carried by the rod, at least one longitudinally continuous layer of electrically conductive material. At each of its ends the thickness of the layer is increased to constitute an effective fuse terminal and, at a position intermediate its terminals, is of such a cross-sectional area that it will melt or otherwise change state to interrupt a circuit at a predetermined overload or short circuit condition. The rod may be of tubular form and, in this case, the longitudinally continuous electrically conductive layer may be on the inner surface of the tubular rod and may extend over each end face of the rod and on to the outer surface of the rod at each end to form terminals of appropriate cross-sectional area.