To provide a circuit breaker capable of selecting and connecting a specific conductor from among a plurality of external conductors connectable to the circuit breaker.
A circuit breaker 1 comprises: a substantially box-shaped body 101 which is formed by including a front face (a), a back face opposing the front face and side faces (c) neighboring to the front face and the back face; and a terminal part 102 for receiving or feeding electricity on a surface of the side face of the body. The terminal part can be disposed by making a position of the terminal part continuously movable between connecting positions so as to select and connect a specific conductor from among a plurality of external conductors connectable to the circuit breaker, and by moving the position in a width direction of the body along the side face (c), regarding a moving direction of the terminal part between the connecting positions.
TANAKA YASUYUKI
OKANO NAOKI
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