Circuit breaker and circuit breaker assembly comprising same

The invention discloses a circuit breaker and a circuit breaker assembly including the same. A circuit breaker assembly according to an embodiment of the present invention includes a circuit breaker and a case coupled to the circuit breaker and accommodating the circuit breaker. The housing is provided with a circuit breaker coupling part to which the circuit breaker is slidably coupled. The circuit breaker coupling portion is provided with a blocking plate for preventing arbitrary movement of the circuit breaker. The circuit breaker is provided with a movement restricting part for preventing any movement. The movement restricting portion includes a plurality of members that are coupled and elastically coupled to each other. The movement restricting portion operates only under the operation of the handle portion and the operation of the connector fastening portion. Therefore, the connection and separation of the circuit breaker and the circuit breaker assembly can be performed only in the operation of a plura