Abstract: An alloy type thermal fuse is provided in which, although a fuse element essentially comprising an In-Sn alloy is used, shear breakage at the melting point or lower can be prevented from occurring even under long-term DC application, the operation stability to a heat cycle can be satisfactorily assured, and a process of drawing to the fuse element at a high yield can be ensured, and which has an operating temperature belonging to the range of 120 to 150° C. As a metal element for preventing long-term DC breakage which prevents the fuse element from being broken under long-term DC application, Cu is added to an In-Sn composition of 52 to 85% In and a balance Sn.

Abstract: The invention relates to an alloy type thermal fuse and a wire member for a thermal fuse element, and provides an alloy type thermal fuse in which a fuse element does not contain a harmful metal, the operating temperature is about 150° C., the dispersion of the operating temperature can be sufficiently suppressed, and the operation stability to a heat cycle can be satisfactorily assured. The thermal fuse has an alloy composition of 30 to 70% Sn, 0.3 to 20% Sb, and a balance Bi.

Abstract: An In—Sn alloy of 85 to 52% In provides advantages that dispersion of an operating temperature can be sufficiently eliminated, and that a high yield can be ensured by adequate ductility, but has a defect which is fatal to a DC fuse, or in which troubles due to long-term DC application such as long-term DC application breakage occurs. In view of this fact, when an alloy type thermal fuse in which an In—Sn alloy is used as a fuse element is used under DC application, stability under long-term DC application that is a condition severer than that under AC application is imposed on the alloy type thermal fuse, whereby the fuse can be rationally used.

Abstract: An alloy type thermal fuse is provided in which, although a fuse element essentially comprising an In—Sn alloy is used, shear breakage at the melting point or lower can be prevented from occurring even under long-term DC application, the operation stability to a heat cycle can be satisfactorily assured, and a process of drawing to the fuse element at a high yield can be ensured, and which has an operating temperature belonging to the range of 120 to 150° C. As a metal element for preventing long-term DC breakage which prevents the fuse element from being broken under long-term DC application, Cu is added to an In—Sn composition of 52 to 85% In and a balance Sn.

Abstract: An alloy type thermal fuse is provided in which, although a fuse element essentially comprising an In-Sn alloy is used, the operation stability to a heat cycle can be satisfactorily assured, and, even when the amount of In is large, a process of drawing to the fuse element at a high yield can be ensured, and which has an operating temperature belonging to the range of 120 to 150° C. The fuse element has an alloy composition in which 0.1 to 7 weight parts of one, or two or more metals selected from the group consisting of Ag, Au, Cu, Ni, Pd, Pt, and Sb are added to 100 weight parts of an alloy of 52 to 85% In and a balance Sn.

Abstract: The invention relates to an alloy type thermal fuse and a wire member for a thermal fuse element, and provides an alloy type thermal fuse in which a fuse element does not contain a harmful metal, the operating temperature is about 150° C., the dispersion of the operating temperature can be sufficiently suppressed, and the operation stability to a heat cycle can be satisfactorily assured. The thermal fuse has an alloy composition of 30 to 70% Sn, 0.3 to 20% Sb, and a balance Bi.

Abstract: An alloy type thermal fuse is provided in which, although a fuse element essentially comprising an In-Sn alloy is used, the operation stability to a heat cycle can be satisfactorily assured, and, even when the amount of In is large, a process of drawing to the fuse element at a high yield can be ensured, and which has an operating temperature belonging to the range of 120 to 150° C.