The utility model discloses a
circuit breaker, relating to the technical field of electric appliances, the
circuit breaker comprises a shell, and a wiring terminal
assembly, a switch
assembly, a main control board and a flexible circuit board which are arranged in the shell, the wiring terminal
assembly comprises a first wiring terminal and a second wiring terminal, a main loop is formed between the first wiring terminal and the second wiring terminal, and the main loop is connected with the switch assembly. The switch assembly comprises a moving contact which is arranged on the main loop and is connected with the first wiring terminal and a static contact which is connected with the second wiring terminal; the flexible circuit board comprises a circuit board body, a
voltage detector and a temperature sensor, the
voltage detector and the temperature sensor are arranged on the circuit board body, one end of the circuit board body is electrically connected with the first wiring terminal, the other end of the circuit board body is electrically connected with the main control board, and the
voltage detector and the temperature sensor are used for detecting the voltage and the temperature of the first wiring terminal respectively. The main control board and the first wiring terminal are connected through the flexible circuit board, the complex wiring structure in the
circuit breaker can be simplified, and the large-scale production efficiency is improved.