In modern electrical safety systems, correct selection of protection devices directly determines personal and equipment safety. Many users and installers are confused: What is the difference between RCD and RCCB? Clarifying these concepts helps you choose the right Residual Current Circuit Breaker to build a safe power distribution system. This article explains the core differences and introduces the CJL1-125 RCCB from Zhejiang C&J Electrical co., ltd. (C&J Electrical)—a reliable Rccb Breaker ideal for household, commercial and industrial applications.
An RCD (Residual Current Device) is the general, umbrella term for any device that detects and cuts power due to leakage current (shock protection). An RCCB (Residual Current Circuit Breaker) is a specific type of RCD that focuses strictly on earth leakage protection, usually requiring a separate MCB (Miniature Circuit Breaker) for overload protection.
In short: All RCCBs are RCDs, but not all RCDs are RCCBs.
- RCD: Generic name for all earth-leakage protection devices.
- RCCB: A specific Rccb Breaker that only provides earth-leakage protection; must work with an MCB for overload and short-circuit protection.
- RCBO: Combined Mcb Rccb that integrates both leakage and overcurrent protection.
For safe and standardized wiring, a dedicated Residual Current Circuit Breaker with stable tripping, long life and easy installation is strongly recommended.
Overview of C&J Electrical CJL1-125 Residual Current Circuit Breaker
The CJL1-125 RCCB is a high-performance residual current operated circuit breaker designed for residential, commercial and industrial low-voltage distribution systems. It provides fast and reliable earth-leakage protection to prevent electric shock and electrical fires. As a professional Rccb Breaker, it must be used together with an MCB to form complete overload, short-circuit and leakage protection.
This series supports AC, A and B type tripping, rated current from 16A up to 125A, rated voltage 230V (1P+N) / 400V (3P+N), 50/60Hz. It adopts 36mm module width, 35mm DIN‑rail mounting, and is widely used in homes, shops, factories, outdoor construction and wet environments. The product uses a new‑generation plastic operating mechanism, full copper internal conductive parts, sealed screw holes, and a new tripping structure for higher safety and stability.
Core Features & Advantages of CJL1-125 RCCB
- Plastic operating mechanism: More stable release force, longer mechanical life, environmentally friendly and durable.
- Full copper current‑carrying parts: Low heat, low power loss, good conductivity and long service life.
- Sealed screw design: Plastic covers seal wiring holes, prevents accidental contact and unauthorized disassembly.
- Large transparent label: Convenient for marking circuits, easy maintenance and management.
- New tripping structure: Faster and more reliable tripping, improves personal and equipment safety.
- Multiple types available: AC type, A type, B type to meet different load requirements.
- High breaking capacity: Up to 6000A, ensures safe interruption under fault conditions.
- Wide sensitivity range: 10mA, 30mA, 100mA, 300mA for personal and equipment protection.
- Strong terminal capacity: Accepts up to 25mm² cables, suitable for main incoming and distribution circuits.
Technical Data
- Standard: IEC/EN 61008‑1
- Rated current: 16A, 20A, 25A, 32A, 40A, 50A, 63A, 100A, 125A
- Rated voltage: 230V~ 1P+N; 400V~ 3P+N
- Frequency: 50/60Hz
- Poles: 2P, 4P
- Module width: 36mm
- Type: AC, A, B
- Breaking capacity: 6000A
- Residual operating current: 10mA, 30mA, 100mA, 300mA
- Operating temperature: -5°C ~ +40°C
- Torque: 2.5~4N/m
- Terminal capacity: top & bottom 25mm²
- Electro‑mechanical endurance: 4000 cycles
- Mounting: 35mm DIN rail
- Suitable busbar: PIN busbar
Application Scenarios
The CJL1-125 Residual Current Circuit Breaker is widely used as an important Rccb Breaker in many fields:
- Residential buildings: Household distribution boxes, kitchens, bathrooms, air conditioning and socket circuits.
- Commercial places: Offices, shops, hotels, restaurants, schools and hospitals.
- Industrial sites: Factories, workshops, assembly lines, pumps, fans and machinery.
- Outdoor & wet environments: Construction sites, water pumps, outdoor lighting, agricultural equipment.
- Combined with Mcb Rccb system: Forms complete protection for main and branch circuits.
Why Choose C&J Electrical CJL1-125 RCCB?
C&J Electrical focuses on low‑voltage electrical safety components. The CJL1-125 Residual Current Circuit Breaker uses high‑quality materials, advanced structure and reliable performance. It provides stable leakage protection, long service life and easy installation.
The product supports OEM brand customization, with complete specifications, wide application and high safety performance. It is an ideal choice for your electrical safety system.
If you have any questions or require further information, please feel free to contact C&J Electrical.
Post time: Apr-03-2026