One embodiment of the present invention provides a fuse having opened-fuse
indication, which places two or more coils or conductors in parallel and
in thermal contact with an indicating material. The multiple conductors
allow a lower level of current to produce sufficient heat or sufficient
electrical resistance to transform the indicating material. The multiple
conductors can also be made of a reduced diameter, resulting in surge
protection at a lower device temperature. The multiple conductor
indicator in an embodiment includes a base material. First and second
conductors contact the base material. An indicating material thermally
couples to the first and second conductors. The indicating material can
be on the inside or outside of the fuse body. If on the outside, the body
can define a recess, wherein the indicator resides within the recess. The
indicator can operate with fuses and other types of circuit protection
devices.