CJ16(19) switch-over capacitor contactor is the new type of components for electric appliances, which is developed and produced on the basis of the introduced foreign technology of the same kind. The device is widely applied to the low voltage reactive power compensation screen to replace the subassembly composed of three XD1 current-limiting reactors and a CJ10 contactor, and it is also can be used in the general control circuit to limit flashy flow.