RCCB Circuit Breakers for Electrical Safety Protection
RCCB (Residual Current Circuit Breaker) is designed to protect people and electrical systems from earth leakage faults. It quickly disconnects the circuit when leakage current exceeds a safe level, ensuring electrical safety in residential, commercial, and industrial applications.
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MOREDAY RCCB Product Lineup - Complete Technical Specifications
High-Performance Series
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
MDB1LE-63 Series
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
MDB1LE-80 Series
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
MDB1LE-100 Series
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
MDB1LE-125 Series
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
ID Series RCCB
- Rated Current: 16A–125A
- Rated Voltage: 230V / 400V
- Sensitivity: 30mA / 100mA / 300mA
- Poles: 2P / 4P
- Breaking Capacity: ≥6kA
- Frequency: 50/60Hz
- Installation: DIN rail
Why Choose MOREDAY?
MOREDAY is a professional manufacturer with over 17 years of experience in designing, producing, and exporting miniature circuit breakers. Located in Yueqing – China’s “Electric Device Metropolis” – we serve distributors, contractors, and electrical engineers across 30+ countries with high-quality, IEC/CE/RoHS certified circuit protection solutions.
- From DC components to energy storage solutions, MOREDAY provides a complete portfolio to support solar, EV charging, and low-voltage electrical applications.
- Equipped with advanced production lines and strict QC processes, we ensure consistent product performance and long-term reliability.
- All products comply with international standards such as IEC, CE, and RoHS, making them suitable for projects across Europe, Asia, and beyond.
- Flexible customization options including branding, specifications, and packaging help you adapt to different market demands and grow your business.
- With rich export experience, MOREDAY offers fast response, stable delivery, and technical support to ensure smooth cooperation and long-term partnership.
More Than Just a MCB Manufacturer
At MOREDAY, we go beyond manufacturing MCBby offering a suite of value-added services tailored to meet your project needs. Our commitment to excellence ensures that every customer receives personalized attention, expert guidance, and seamless support throughout their journey with us.
Technical Consultation
Our engineering team provides professional DC protection design support for solar PV systems. From breaker selection to full combiner box configuration, we help you ensure safety, compliance, and long-term reliability.
OEM & Custom Solutions
We support logo printing, customized voltage ratings, special tripping curves, and private label packaging. MOREDAY helps distributors and project contractors build competitive branded products for local markets.
Certified Quality Assurance
Our products comply with CE, CB, and TÜV standards. Each unit undergoes strict testing for breaking capacity, temperature rise, and durability to meet international project requirements.
Global Project Experience
MOREDAY products are widely used in solar power plants, energy storage systems, EV charging stations, and industrial applications across Europe, Asia, and Africa.
Knowledge About RCCB
An RCCB (Residual Current Circuit Breaker) is a device designed to prevent electric shocks and fires caused by leakage currents. Sounds fancy, right? Essentially, it monitors the current flowing through the live and neutral wires. In an ideal situation, the current in both wires should be equal. But if there’s a fault—like someone touching a live wire or a damaged appliance causing a leak to the ground—the current gets imbalanced. The RCCB detects this imbalance and trips the circuit in milliseconds, cutting off the power.
- What does 30mA RCCB mean?
A 30mA RCCB trips when it detects just 30 milliamps of leakage current—about the same as the current from a small AA battery. It’s designed to protect people in areas where electric shock risk is high.
- What is the difference between RCCB and RCBO?
An RCCB protects against ground faults, while an RCBO combines ground fault protection with overcurrent protection. An RCBO is essentially an RCCB and a circuit breaker in one device.
- Where should RCCB be installed?
An RCCB is not wired like a standard MCB; it functions as a “gatekeeper” for a group of circuits. It should be installed “upstream” of the MCBs it is intended to protect.
Current Rating: Depending on the maximum current expected in the circuit, choose an RCCB with an appropriate ampere rating to handle the load.
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