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The difference between an air switch and a circuit breaker
Published Time:
2026-09-05
author：anxele
In the electrical system, air switches and circuit breakers are both crucial electrical devices. Despite their many functional similarities, there are significant differences in their structures, working principles, and application scenarios. In this article, Mr. Ye, a professional inspector and certifier, will introduce the distinctions between air switches and circuit breakers, aiding readers in better understanding and utilizing these two devices.
1. What is an air switch?
Air switch, whose full name in Chinese is circuit breaker, is an electrical device used for automatic control and protection of low-voltage circuits. It mainly achieves circuit opening and closing through manual or electric mechanism-driven switches. Air switches are typically suitable for circuits with a rated voltage below 380V and a current below 1000A. When the current in the circuit is too high, the air switch will automatically disconnect the circuit to protect the safety of equipment and lines
2. What is a circuit breaker?
A circuit breaker is an electrical device used to automatically cut off power in the event of an overload, short circuit, or other faults in a circuit. Circuit breakers utilize electromagnetic mechanisms to drive the switching action, enabling them to quickly interrupt the circuit and protect equipment from damage caused by faults. Circuit breakers are suitable for use in power systems of various voltage levels.
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