In residential, commercial and light industrial electrical systems, electric leakage is one of the most common and dangerous hidden risks, easily causing electric shock injuries and electrical fires. To solve this problem, Rccb Residual Current Circuit Breaker has become a mandatory safety device in global power distribution systems. Among all specifications, the 30mA residual current setting is the most classic and widely used standard for personal safety protection.
A 30mA RCCB (Residual Current Circuit Breaker) is used as the global standard for human protection against lethal electric shocks. It instantly disconnects the power supply when it detects current leakage, preventing severe injuries or electrocution.
As a core safety protection device, the Rccb Circuit Breaker differs from ordinary MCB breakers. MCB mainly protects circuits from overload and short circuit faults, while the Rccb Breaker focuses on leakage current monitoring and electric shock prevention. Whether it is a Double Pole Rccb or 4P RCCB, the 30mA high-sensitivity tripping design can quickly cut off faulty circuits before leakage current causes harm to the human body, making it the first line of defense for electrical safety.
Why 30mA Is the Universal Standard for RCCB Protection
Many users wonder why 30mA is fixed as the mainstream residual operating current for household and commercial Rccb products. The core reason comes from human body electric shock safety standards and fault response characteristics:
Human bodies can withstand a limited range of leakage current. A current exceeding 30mA is likely to cause muscle spasm, loss of control and even lethal electric shock accidents. The 30mA threshold perfectly balances safety and stability: it is sensitive enough to avoid personal electric shock risks, while not causing frequent false tripping due to tiny normal leakage of electrical equipment.
Equipped with instantaneous tripping performance, the 30mA Rccb Residual Current Circuit Breaker can complete power-off protection within 0.3 seconds when leakage occurs, effectively protecting personal safety and avoiding fire accidents caused by leakage heating. Therefore, it has become a universal safety standard recognized by IEC and global electrical specifications.
Product Overview of C&J Electrical CJL3-63 RCCB
Zhejiang C&J Electrical co., ltd. (referred to as C&J Electrical) launches the CJL3-63 series RCCB, a high-performance residual current circuit breaker developed in strict accordance with IEC61008 international standards. This series includes electromagnetic and electronic types, covering 2P and 4P pole configurations, including the widely used Double Pole Rccb model.
The CJL3-63 Rccb Circuit Breaker supports multiple residual current specifications such as 30mA, 100mA, 300mA and 500mA. Among them, the 30mA high-sensitivity model is specially designed for human electric shock protection. The product features stable performance, strong anti-interference ability and high short-circuit withstand capacity, suitable for terminal power distribution leakage protection in various civilian and commercial scenarios.
The whole series supports standard 35.5mm symmetrical DIN rail installation and panel mounting, with flexible installation methods. The IP20 protection grade and finger-protected terminal design greatly improve the safety of daily operation and maintenance.
Core Construction and Functional Features
CJL3-63 series Rccb Breaker integrates leakage protection, isolation function and high short-circuit resistance, with comprehensive and reliable performance:
- Dual Protection of Leakage and Isolation: Effectively protects circuits and personnel from earth fault and leakage current hazards, and has reliable circuit isolation function to ensure safe power maintenance.
- High Short-Circuit Withstand Capacity: The product has a rated conditional short-circuit current and residual short-circuit current up to 10kA, which can withstand instantaneous impact of large short-circuit current and avoid equipment burnout caused by short-circuit faults.
- Visual Contact Position Indication: Equipped with a clear contact state indication structure, users can directly observe the on/off state of the circuit breaker, facilitating daily inspection and fault judgment.
- Finger Protected Terminals: The connection terminals adopt finger protection design to prevent accidental touch and electric shock during wiring and operation, improving construction safety.
- High-Strength Fire-Resistant Housing: Adopts fire-resistant plastic materials, which can resist abnormal high temperature heating and strong impact, with excellent flame retardant and anti-aging performance.
- Instantaneous Leakage Tripping: When the earth fault or leakage current exceeds the rated sensitivity value, the breaker will automatically and instantly disconnect the circuit within ≤0.3s to eliminate safety hazards in the first time.
- Strong Anti-Interference Performance: The operation is independent of power supply and line voltage, free from external interference and voltage fluctuation, ensuring stable and accurate tripping action in complex power environments.
Detailed Technical Data
CJL3-63 series Rccb Residual Current Circuit Breaker has complete specifications and standardized parameters, meeting international electrical safety standards:
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Technical Items
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Specifications
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Executive Standard
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IEC61008
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Product Type
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Electro-magnetic type, Electronic type
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Residual Current Characteristic
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A, AC
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Pole Number
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2P, 4P
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Rated Current
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25A, 40A, 63A
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Rated Voltage
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AC 230(240)/400(415)V
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Rated Frequency
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50/60Hz
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Rated Residual Operating Current
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0.03A, 0.1A, 0.3A, 0.5A
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Conditional Short-Circuit Current
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10kA
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Instantaneous Tripping Time
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≤0.3s
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Electro-Mechanical Endurance
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4000 cycles
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Max Connection Capacity
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25mm² rigid conductor
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Installation Method
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35.5mm DIN rail / Panel mounting
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Protection Class
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IP20
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Application Scenarios
With high safety performance and stable operation, CJL3-63 Rccb Circuit Breaker is widely used in various scenarios requiring leakage protection and electric shock prevention:
- Residential Buildings: The 30mA high-sensitivity Double Pole Rccb is installed in household distribution boxes to protect indoor sockets, lighting and electrical equipment, preventing household electric shock and leakage fire risks.
- Commercial Places: Suitable for offices, shops, hotels and shopping malls to provide safe leakage protection for public power distribution systems.
- Light Industrial Workshops: Used for terminal power distribution protection of small processing equipment to avoid equipment damage and personal injury caused by line aging and leakage.
- Public Facilities: Applied in campus buildings, community public areas, park facilities and other places with high pedestrian flow to ensure public electricity safety.
Product Advantages
CJL3-63 series Rccb Breaker launched by C&J Electrical has comprehensive performance advantages in terminal leakage protection scenarios:
- High Safety & Fast Response: 30mA high-precision leakage detection and instantaneous tripping effectively avoid electric shock accidents, with fire-resistant and anti-touch design for double safety guarantee.
- Strong Fault Resistance: 10kA high short-circuit withstand capacity, stable operation in complex power environments, not affected by voltage fluctuation and external interference.
- Diversified Specifications: Multiple current, pole number and residual current specifications are optional, covering household, commercial and light industrial needs.
- Flexible Installation: Dual installation modes of DIN rail and panel mounting, convenient wiring and firm connection.
- Durable Performance: 4000 times electrical mechanical endurance, stable long-term operation and low failure rate.
- Customization Support: Provide professional OEM/ODM brand customization services to meet personalized product matching needs of different customers.
Contact Us
CJL3-63 series Rccb Residual Current Circuit Breaker is a high-safety and high-reliability leakage protection device launched by C&J Electrical. The 30mA core model complies with global human body protection standards, providing reliable electric shock prevention and leakage fire protection for various power distribution systems.
If you have any questions about product selection, parameter matching, installation and use, or need customized OEM/ODM services, please feel free to contact us. C&J Electrical will provide you with professional technical support and after-sales service.
Post time: May-29-2026