Alloy type thermal fuse and wire member for a thermal fuse element

摘要

A wire member for thermal fuse element (2) comprises an alloy composition in which tin is larger than 43-70%, indium is 0.5-10 and balance is bismuth. An independent claim is also included for an alloy type thermal fuse where a wire member for thermal fuse element is used as a fuse element, and an operating temperature belongs to 130-170[deg]C, and is lower than a liquidus temperature of a fuse element by >=6[deg]C.