RCBO (Residual Current Circuit Breaker with Overcurrent Protection, a residual current operated circuit breaker with overcurrent protection) is a low-voltage protective device that integrates leakage protection, overload protection and short-circuit protection functions. Compared with the traditional RCCB (leakage protection device) + MCB (Miniature circuit breaker) combination, RCBO has a more compact structure and can independently protect a single circuit. Therefore, it is increasingly widely used in modern residential, commercial building and industrial power distribution systems.

The price of RCBO mainly depends on the rated current, number of poles, leakage operating current, breaking capacity, brand and certification requirements. The market price of ordinary domestic RCbos (such as 6A-63A, 1P+N, 30mA leakage protection) is usually about 30 to 150 RMB per piece. The price of high-quality industrial-grade products is approximately 100 to 300 RMB per piece. The prices of products from international brands such as Schneider Electric, ABB, Siemens, etc. may reach 200-600 yuan per piece or even higher. In the export market, if compliance with IEC standards, CE certification, UKCA certification or specific country certifications is required, the price will also increase accordingly.

The RCBO is mainly applied in places with high security requirements. For instance, in residential distribution boxes, RCBO is often used to protect independent circuits such as lighting, sockets, air conditioners, and water heaters, preventing electric shock to people due to leakage. It is used for the protection of terminal equipment in commercial buildings such as hotels, shopping malls and office buildings. In the industrial field, it is used in control cabinets, equipment power supplies and outdoor distribution boxes to enhance the safety of equipment operation.

For foreign trade projects, RCBO has a large market demand in the Middle East, Europe, Australia and other regions. Customers usually pay attention to rated current (such as 16A, 32A, 40A), number of poles (1P+N, 2P, 4P), leakage current (30mA/100mA), breaking capacity (6kA/10kA) and IEC 61009 certification. Compared with using MCB and RCCB alone, RCBO has advantages such as small installation space, clear protection range and convenient maintenance. Therefore, it is increasingly applied in high-end residences and engineering projects.