Is the fuse the capacitor
When the line occurs short circuit or overload, the heat generated by the high current flowing through the self-recovery fuse causes the polymer resin to melt and the volume grows rapidly to form a high resistance state (b), and the working current is rapidly reduced to limit and protect the circuit.
there is a self-recovery fuse, self-recovery fuse is a specially treated polymer resin (Polymer) and distributed in the inside of the conductive particles (Carbon Black) composition
the traditional fuse is a larger resistivity, lower melting point of the metal or alloy, through the excessive current, the fuse heat blow.
Under normal operation, the polymeric resin tightly binds the conductive particles to the crystalline structure, forming a chained conductive path, where the self-healing fuse is in a low resistance state (a), and the current flowing through the self-recovery fuse
When the fault is removed, the self-recovery fuse recovers the crystal, the volume shrinks, the conductive particles re-form the conductive path, and the self-healing fuse returns to the low resistance state, thus completing the protection of the circuit without manual replacement.