BREAKER AND CONTACTOR

Provided is a breaker, comprising a first stationary contact having a first static contact portion; a movable contact having a first movable contact portion; an actuator connected to the movable contact to actuate the movable contact in a first direction between an open position and a closed position; a first arc-extinguishing device comprising a plurality of arc-extinguishing grids; a first arc-moving plate that extends from a first arc-moving end which is arranged adjacent to the first static contact portion, through the first arc-extinguishing device, to a second arc-moving end thereof so as to direct an electric arc from the first stationary contact to the first arc-extinguishing device; and an arc-striking sheet provided with a first arc-striking segment, which extends in a first direction and is arranged between the movable contact and the first arc-extinguishing device in a second direction perpendicular to the first direction, so as to direct an electric arc from the movable contact to the first arc-extinguishing device. A second arc-moving end of the first arc-moving plate and the first arc-striking segment are arranged on opposite sides of the first arc-extinguishing device in the second direction. A contactor comprising the breaker is further provided.