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Circuit Breakers are commonly used in the field of electronics, with applications ranging from home appliances to industrial machinery. They are essential components of any electrical system, controlling when and where electricity passes, and ultimately, protecting the equipment from destructive high-voltage surges.Circuit Breakers work by using a bimetallic strip to detect an overload on a circuit and to trip the circuit in case of emergency. The bimetallic strip is typically composed of two different metals, such as copper and steel, which have different coefficients of expansion. When the circuit is under a normal load, the two metals stay in contact, allowing electric current to flow freely through the circuit.However, when a circuit is overloaded or short-circuited, the current flowing through the circuit increases and begins to heat up the bimetallic strip. As the strip heats up, the different metals expand at different rates, causing the strip to bend and trip the circuit, interrupting the flow of electricity to the load. Once tripped, the circuit breaker must be manually reset before power can be restored.The basic principle of circuit breakers applies to both AC and DC circuits. In low-voltage AC circuit breakers, a solenoid is used instead of the bimetallic strip, and the current is detected by a magnetic field. When the current reaches a certain level, the overload trips the circuit, again interrupting the power to the load. DC circuit breakers, on the other hand, use a temperature switch to detect rising temperatures, and then trip the circuit when they reach a certain level.Today, circuit breakers are available in various types and sizes, ranging from miniature household models to larger commercial-grade industrial models. They are used in a variety of applications, including automotive, marine, lighting, HVAC, and industrial control circuits.Overall, circuit breakers are essential components in any electrical system, providing safe, reliable protection from short circuits and other unexpected overloads. They are indispensable tools for keeping our homes, workplaces, and equipment safe from dangerous electrical surges. As such, they have become one of the most widely used devices in the field of electronics and are sure to remain so for years to come.

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