Fuse Self-Recovery Function

When the overcurrent overheating failure is eliminated, the fuse element can be automatically restored to a low resistance state. This avoids maintenance changes and the opening and closing states of successive loops that can cause circuit damage. Due to its special manufacture, the reset fuse has the dual functions of overcurrent and overheating protection as well as automatic recovery. The self-recovery fuse is made from a mixture of polymers and conductive materials. The polymer reset fuse consists of a polymer resin matrix and a conductive particle distributed in it. Under normal circumstances, conductive particles in the resin matrix form a chain conductive pathway, and the polymer can reset the fuse to present a low impedance (a). When an electric current occurs in the circuit, the heat generated by the high current flowing through the polymer can reset the fuse causes the volume of the polymer resin substrate to expand, cutting off the chain conductive path formed by the conductive particles, resulting in a rapid increase in impedance therefore, the polymer can reset the fuse can play an overcurrent protection effect on the circuit (b). After the failure is eliminated, the resin cools and crystallizes again, the volume shrinks, the conductive particles form the conductive channel again, and the polymer can restore the fuse to a low impedance. Compared with conventional fuses, it has the advantages of self-repetition, small size and stronger.