1. The circuit breaker is equipped with an arc suppression device that can trip itself, thereby cutting off resistance and barrier currents; The air switch is not equipped with arc suppression equipment, so it cannot be used to disconnect resistance and barrier currents.

2. In terms of operation, circuit breakers can be electrically controlled from a distance; The air switches are mostly manually controlled.

3. The interface insulation level of circuit breakers is low, so they are usually used to handle resistance and barrier currents; "The ability to overvoltage is very weak, and the insulation level of the interface of the air switch is very high. It is usually used to handle voltage, and cannot handle resistance and barrier currents.".

4. The circuit breaker can protect the current circuit and motor, and disconnect the barrier current; The air switch is usually used for isolation and operates without resistance.