| 摘要 |
PROBLEM TO BE SOLVED: To obtain a lead free alloy thermal fuse superior in operating reliability in a range of 70-109°C without containing lead or cadmium which causes environmental problems. SOLUTION: In the thermal fuse which uses a fusible alloy as a fuse element, a lead free alloy thermal fuse is obtained by using a low melting-point fusible alloy in which a ternary alloy composed of the composition of Bi 64 wt% to 69 wt%, Ag 0.05 wt% to 0.3 wt%, and In the rest, the composition of Bi 47 wt% to 55 wt%, Ag 0.05 wt% to 0.2 wt%, and In the rest, and the composition of Bi 32 wt% to 37 wt%, Ag 0.01 wt% to 0.1 wt%, and In the rest is used. COPYRIGHT: (C)2004,JPO
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