CB251-40

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Circuit breakers are designed to protect electrical circuits from damage caused by excessive current, short circuits, or ground faults. The CB251-40 is a popular single-phase circuit breaker used in residential, commercial and industrial applications. This breaker is rated to interrupt up to 40 amps, and is commonly used for lighting, electrical outlets, motors, HVAC systems, and emergency circuits.

The CB251-40 consists of two main components: an actuator, which is the physical switch that is connected to the power source, and an overload sensor, which monitors the amount of current that passes through the actuator. The overload sensor is responsible for detecting when a fault occurs and triggering the actuator to switch off the circuit. The CB251-40 is especially useful for applications where frequent types of overloads occur, such as motor loads and HVAC systems.

When a fault or overload occurs, the overload sensor detects the change in current and sends a signal to the actuator. The actuator then breaks the electrical circuit, cutting off the power to the affected area. The CB251-40 is designed to automatically reset after the fault has been removed, allowing the circuit to remain operational. This quick resetting action helps to prevent damage to electronic devices, wiring, and circuit boards.

The CB251-40 is suitable for residential, commercial, and industrial applications with current ratings up to 40 amps. It is designed to withstand high current surges from frequent types of overloads, and is available in both a manual and an automatic resetting version. It is UL 489-Listed, CE-certified, and conforms to IEC 60898-1 standards, making it a reliable and safe choice for circuit protection.

The CB251-40 offers reliable protection for a wide range of electrical systems, from residential wiring and lighting circuits to industrial motor control and HVAC systems. It is a cost-effective solution for controlling electrical current and protecting circuits from damage caused by overloads and faults. Whether installed in residential, commercial, or industrial applications, the CB251-40 is an excellent choice for circuit protection.

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