| 摘要 |
PROBLEM TO BE SOLVED: To provide an overcurrent protecting technology convenient to use in which a pattern conductor for a fuse is used. SOLUTION: As a circuit board, this is provided with a connection switching means to select either a plurality of the pattern conductors for a fuse connected mutually in parallel, and the plurality of pattern conductors for the fuse connected in series respectively to the plurality of pattern conductors for the fuse and to connect it to the circuit, and when the pattern conductor for the fuse in using is fused by the overcurrent, the other pattern conductor for the fuse out of the plurality is made into a connection state by the connection switching means, and an electric current passage or a signal passage to a load side circuit is newly formed. COPYRIGHT: (C)2006,JPO&NCIPI
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