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An RCBO (Residual Current Circuit Breaker with Overcurrent Protection) is an electrical safety device that provides both residual current protection and overcurrent protection. It is a combination of a miniature circuit breaker (MCB) and a residual current device (RCD).

RCBOs are commonly used in applications where protection against both overcurrent and electrical shock is critical, such as for sensitive electronic equipment or machinery. They are typically installed in the distribution board or panel to protect individual circuits.

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