A bus bar 10 includes integrally therewith a plurality of load side terminal boards 12 to be connected to a power supply side terminal board through their respective fusible members 13, the shapes of the fusible members are unified, temporarily connecting points are set in the intermediate portions of the fusible members in a current flow direction, the temporarily connecting points of the mutually adjoining fusible members are connected to each other by joint ribs 15 to be cut in a later step, and, by changing the cutting positions of the joint ribs to be cut in the later step, the fusing properties of the fusible members can be changed.
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