1. The ability to interrupt the current is different: the load and short-circuit current that the circuit breaker can withstand is larger.
2. The  supporting equipment is different: Generally ,the measurement, the logic and the equipment of the working part are more complicated than the air switch.
3. Differences in voltage levels: The voltage level applicable to general air switches is less than 500V, but circuit breakers can usually be applied to voltage levels above 220V.
4, The difference between arc extinguishing medium and mode: the arc extinguishing medium and method of circuit breaker not only have air circuit breaker, but also vacuum circuit breaker, multi-oil circuit breaker, less oil circuit breaker, sulfur hexafluoride circuit breaker, etc.