Circuit breakers are electrical switches that automatically shut off the electrical power to a circuit when there is an overload or a short circuit. They are designed to protect electrical circuits from damage caused by excessive current, which can lead to overheating, fires, or damage to electrical equipment.

Circuit breakers come in different types and ratings, typically based on their amperage capacity, voltage rating, and interrupting capacity. The amperage capacity is the maximum current that the circuit breaker can carry safely without tripping, while the voltage rating is the maximum voltage it can handle. The interrupting capacity is the maximum amount of current the circuit breaker can safely interrupt during a short circuit or overload.

There are different types of circuit breakers, including:

    Thermal Circuit Breakers: These circuit breakers use a bimetallic strip that heats up during an overload, causing it to bend and trip the breaker.

    Magnetic Circuit Breakers: These breakers use an electromagnet that trips the circuit breaker in response to a sudden surge of current.

    Hydraulic Circuit Breakers: These use a hydraulic system to trip the circuit breaker during an overload.

    Residual Current Circuit Breakers (RCCB): These breakers are designed to protect against electrical shock by detecting and interrupting current leakage.

Circuit breakers are commonly used in residential, commercial, and industrial applications. They are typically installed in electrical panels or switchboards and are essential for ensuring electrical safety.