Residual Current Circuit Breakers with Overcurrent Protection (RCBOs) are advanced safety devices that combine the functions of a Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD) in a single compact unit. RCBOs protect electrical circuits from overcurrent, caused by overloads or short circuits and from earth leakage faults. This dual protection helps prevent electric shocks, fires, and damage to equipment.

RCBOs are commonly installed in consumer units and distribution boards across residential, commercial, and industrial environments. Their space-saving design makes them ideal for modern installations, and they are available in a wide range of current ratings, trip curves, and sensitivity types to suit diverse applications.

At RS, we offer a wide range of RCBOs from trusted brands such as Eaton, Europa, ABB, and Schneider Electric, ensuring high-quality solutions for every application. Our selection also includes Better World products, designed with sustainability in mind, featuring eco-friendly materials, extended life cycles, and reduced environmental impact. With thousands of options available and Next Day Delivery, RS makes it easy to find the right RCBO for your needs quickly and responsibly.

Types & Features of RCBOs

• **Type AC **– Detects and trips on alternating sinusoidal residual currents. Suitable for general domestic use.
• **Type A **– Detects both AC and pulsating DC residual currents. Ideal for modern appliances with electronic components.
• Type B** **– Detects AC, pulsating DC, and smooth DC residual currents. Suitable for installations with EV chargers, solar panels, and industrial equipment.
• Type S – Time-delayed tripping to allow discrimination between devices. Used in systems requiring coordination between multiple protection devices.

Find out more in our comprehensive RCBOs guide.