| 摘要 |
A thin type thermal fuse is structured by a resin base film (11), a pair of belt-shaped lead conductors (2), a low melting-point fusible alloy piece (3), flux (4) and a resin cover film (12). Tip portions of the pair of belt-shaped lead conductors is fixed on the resin base film. The low melting-point fusible alloy piece (3) is coupled between the tip end portions of the belt-shaped lead conductors (2). The flux (4) applied on the low melting-point fusible alloy piece (3). The resin cover film (12) which is disposed on a one surface of the resin base film (11) so that a space between said films at peripheries of both the resin cover film and the resin base film is sealed and a space between the resin cover film and the belt-shaped lead conductors is sealed. In the thin type thermal fuse, a relation of (V/L)<1/2 >/d </= 1.8 is satisfied, where a distance between the tip portions of the belt-shaped lead conductors (2) is set to be L, a volume of the low melting-point fusible alloy piece (3) is set to be V and a distance between the front surface of the resin base film (11) and an inner surface of the resin cover film (12) is set to be d. <IMAGE> <IMAGE> |
