A current-carrying wire composed of a composite material that melts at a moderate temperature is called a fuse wire.
It is made up of an alloy of lead, tin, or zinc.
Characteristics of fuse wire.
Its primary component seems to be a metal wire and a strip that melts whenever too much current travels through it, disrupting the circuit to which something is connected.
Insufficient current is caused mainly by short circuits, overloading, mismatched workloads, or equipment failures. Fuses could be used in place of circuits.
It must have a low melting point and high specific resistance.
It must be economical as it can be made from silver metal, but silver metal is too expensive.