Is the fuse blown directly with copper wire?
While the melting point of copper wire is much higher than the lead tin, the current is still not large when the fuse will damage the electrical. If you can not find it,
But if the lead with the fuse, its melting point is low, when the current is too large when the fuse, you can protect the electrical.
The reason why the use of lead in the fuse of this kind of low melting point of the metal, because it can protect the electrical equipment and electrical lines, when the current load is too large, may damage the circuit.
, you can use copper wire temporarily instead, but should be replaced as soon as possible after the find.