Overcurrent alarm switch

The utility model relates to an overcurrent alarm switch, which comprises a fixing seat and a fuse, wherein a sliding block is arranged in the fixing seat in slide manner, the sliding block is provided with a moving wafer and the fixing seat is fixedly provided with a static wafer. The sliding block has two operating states. When the sliding block is under the first operating state, the fuse presses the sliding block and the moving wafer is separated from the static wafer. When the sliding block is under the second operating state, the fuse is broken and the moving wafer is in contact with the static wafer. When the overcurrent intrudes in the circuit, the fuse is fused to break, so the overcurrent source is cut off. Simultaneously, the sliding block is released and slides to the second operating state, the moving wafer is in contact with the static wafer and an alarm circuit is switched on. The utility model is convenient for inspection and replacement of maintenance personnel.