A device has a wiring terminal for connecting a busbar, the wiring terminal has a connecting rod, which partly inserts into the wiring terminal and has an interference fit with the wiring terminal, the connecting rod has a conductive first column portion that has an interference fit with the busbar, the first column portion axially arranges a conductive second column portion that has an interference fit with the first column portion, the second column portion is located inside of the first column portion, a thermal expansion coefficient of the second column portion is greater than that of the first column portion, a resistivity of the second column portion is greater than that of the first column portion, a material of the second column portion is an aluminum or an aluminum alloy, and a material of the first column portion is a copper or a copper alloy.