When designing and maintaining low-voltage residential and commercial power distribution systems, electrical practitioners often confuse Rcd Rcbo Rccb series devices. Many users are unclear about the functional differences and application boundaries between RCCB and RCBO, resulting in improper selection and potential electrical safety hazards. Choosing the right Rcbo Breaker is critical for stable and safe circuit operation.
RCBO vs RCCB: Key Differences
RCBO protects from earth faults and overcurrent. In contrast, RCCB protects from earth faults only. Furthermore, an RCBO generally has a higher initial cost compared to an RCCB. That’s why many people tend to connect the RCCB to an MCB for the same protection as an RCBO provides.
Simply put, RCCB is a single-function residual current protection device that only prevents electric leakage and electric shock risks. To achieve full-circuit protection, it must be used in combination with an Mcb Rcbo matching unit. As an integrated Rcbo Circuit Breaker, RCBO perfectly combines the leakage protection function of RCD and the overcurrent protection function of MCB. It integrates earth fault, overload and short-circuit protection in one single device, featuring simple installation, stable performance and no need for combined matching. It is the preferred protective device for modern refined power distribution systems.
Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) launches the CJRO3-40 series high-performanceRCBO breaker, which strictly complies with IEC/EN 61009-1 international standards. Covering 6A to 40A wide current range, this product supports multiple protection modes and specification combinations, delivering all-round reliable safety protection for household and commercial terminal low-voltage distribution systems.
Core Differences Between RCCB and RCBO
To help users accurately select devices, we further sort out the essential differences between RCCB and Rcbo Breaker from protection functions, installation modes and application scenarios:
- Protection Function: RCCB only provides single earth leakage fault protection, lacking overload and short-circuit protection capabilities. The integrated Rcbo Circuit Breaker has three core protections: residual current leakage prevention, overload overcurrent protection and short-circuit rapid breaking, realizing full-dimensional circuit safety monitoring.
- Installation Matching: RCCB cannot be used independently and must be paired with MCB to form a complete protection system. CJRO3-40 RCBO integrates MCB and RCD functions in one body, which can be used independently with simple wiring and saves distribution box space.
- Cost & Maintenance: Single RCCB has a low unit price, but the overall matching cost of supporting MCB is higher with complex later maintenance. Integrated Rcd Rcbo Rccb equipment has standardized overall cost, unified fault detection and simpler daily operation and maintenance.
- Scenario Adaptability: RCCB+MCB combination is suitable for large-scale centralized circuit protection. Independent Rcbo Breaker is more suitable for household branch circuits, commercial precision equipment terminals and independent single-circuit high-precision protection scenarios.
C&J Electrical CJRO3-40 Rcbo Circuit Breaker Product Overview
CJRO3-40 series RCBO is a new-generation integrated overcurrent residual current protection device developed for household and commercial low-voltage terminal distribution systems. The product is applicable to 50Hz/60Hz AC circuits with rated voltage of 230V and 400V, and the rated current covers 6A to 40A mainstream specifications, fully meeting the power consumption and protection needs of daily household electrical appliances and commercial small and medium-sized equipment.
This Rcbo Breaker perfectly integrates the dual core functions of traditional MCB overcurrent protection and RCD leakage protection. It can effectively protect personal electric shock accidents and indirect contact electrical injuries caused by circuit leakage, and also cut off overload and short-circuit faults in a timely manner to protect electrical equipment and line safety. In addition to safety protection, it can also be used as a non-frequency circuit operating switch, with high practicality and wide coverage. All products are manufactured in strict accordance with IEC/EN 61009-1 international standard specifications, with stable quality and compliant performance.
Core Product Functions
- Residual Current Earth Fault Protection: With multiple leakage sensitivity grades from 10mA to 500mA, it can quickly identify circuit residual current faults, effectively prevent personal electric shock and electrical fire accidents caused by line leakage.
- Overload Protection: Adopts B, C, D three types of thermo-magnetic release characteristics, which can stably monitor circuit overload current and automatically trip to cut off the power supply when the circuit is overloaded for a long time to avoid line aging and equipment burnout.
- Short Circuit Protection: With a 6000A rated short-circuit breaking capacity, it can instantly respond to instantaneous short-circuit faults, quickly isolate faulty circuits and prevent large-current impact damage to the power distribution system.
- Fault Visual Indication: Equipped with a professional fault current indicator, which can intuitively feed back circuit fault status, facilitating electricians to quickly troubleshoot and repair.
- Stable Circuit Switching: It can be used as a daily circuit non-frequency operating switch, supporting frequent opening and closing operations with long mechanical and electrical service life.
Complete Technical Parameters
CJRO3-40 series RCBO has complete and standardized technical parameters, compliant with international electrical standards, suitable for global household and commercial low-voltage distribution projects:
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Technical Items
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Specifications
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Executive Standard
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IEC/EN 61009-1
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Product Mode
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Electro-magnetic type / Electronic type
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Leakage Sensing Type
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A type, AC type
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Thermo-magnetic Characteristic
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B, C, D
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Rated Current
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6A,10A,16A,20A,25A,32A,40A
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Pole Number
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1P+N, 3P+N
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Rated Voltage
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AC 230V, 400V
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Rated Leakage Sensitivity
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10mA,30mA,100mA,300mA,500mA
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Residual Making & Breaking Capacity
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500A
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Rated Short-circuit Capacity
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6000A
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Maximum Breaking Time
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≤0.1s
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Rated Frequency
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Rated Impulse Withstand Voltage
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4000V
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Dielectric Test Voltage
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2kV (1min)
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Insulation Voltage
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250V
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Pollution Degree
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2
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Electrical Life
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4000 cycles
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Mechanical Life
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10000 cycles
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Fault Indicator
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Available
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Protection Degree
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IP20
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Application Scenarios
Benefiting from integrated multi-protection, compact structure and stable performance, CJRO3-40 RCBO is widely applicable in residential and commercial low-voltage terminal power distribution scenarios:
- Residential Household Power Distribution: Suitable for household socket circuits, kitchen and bathroom high-power electrical circuits, lighting branch circuits and main gate circuits, comprehensively protecting household electricity safety and preventing electric shock and electrical fire hazards.
- Commercial Building Systems: Applied to office buildings, retail stores, hotels and other commercial space terminal power distribution equipment, adapting to frequent power consumption and multi-equipment parallel operation scenarios.
- Public Facility Circuits: Suitable for community public lighting, corridor power distribution and other public facilities, providing stable and long-term safety protection.
- Small Industrial Terminal Equipment: Used for small mechanical and electrical equipment, intelligent terminal equipment circuit protection, adapting to daily low-load and medium-load operation working conditions.
Product Services & Supply Advantages
CJRO3-40 series Rcbo Circuit Breaker has rich specification options, covering multiple current, voltage and protection type combinations. It integrates MCB and RCD functions, replacing the traditional Mcb Rcbo combined installation mode, saving installation space and reducing engineering costs, with high safety performance and wide scenario adaptability.
C&J Electrical provides comprehensive supporting services for this product series. We support OEM/ODM brand customization to meet personalized product and solution needs of global customers. Meanwhile, we provide SKD loose parts delivery service to adapt to diverse procurement and assembly cooperation modes. If you have any questions about product selection, parameter matching, scenario adaptation and customized cooperation, please feel free to contact us for professional technical support.
Contact Us
In short, compared with single-function RCCB, integrated RCBO has more comprehensive protection functions and simpler installation and maintenance. As a high-quality Rcbo Breaker, C&J Electrical CJRO3-40 complies with international standards, with stable and reliable performance, which is an ideal choice for modern household and commercial low-voltage power distribution safety upgrading.
Welcome global customers to consult, purchase and customize products. We will provide full-cycle professional after-sales service and technical support.
Post time: Aug-07-2026