To limit current at high speed when overcurrent flows.

In an overcurrent protective device 30, if overcurrent flows into a PTC device 14, the PTC device 14 limits the overcurrent. Heat generation in a trip state closes a bimetal switch BS, which excites a relay coil RY to open a normally-closed contact NC, resulting in separation of a teach pendant TP (load) side connected to the PTC device 14. And a normally-open contact NO is also closed to perform self holding. The overcurrent protective device 30 can limit the overcurrent at high speed when the overcurrent flows and separate a circuit on a load side with a relay after limiting the overcurrent.