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Residual current-operated circuit breakers with overcurrent protection, up to 400v 63a,6ka capacity.

  • Residual current detection 10mA to 100mA
  • High sensitivity
  • Compact design
  • Test and reset buttons
  • Wide range of amperage ratings

Stable Delvery Time

Technical Support

2 Years


MDB1LE-63 Residual Current Operated Circuit Breaker (RCBO)

The MDB1LE-63 AC RCBO is a cutting-edge circuit protection device designed to ensure the safety of electrical installations by combining the functions of an MCB and RCCB. This RCBO offers comprehensive protection by detecting and interrupting earth leakages and residual currents, thereby preventing electrical shock and fire hazards. It’s equipped with overload and short-circuit protection, suitable for both residential and commercial applications.

Key Features

AC RCBO BREAKER MDB1LE-63 Compliance and Standards

Compliance and Standards

Certified to IEC61009-1 standards and bears the CE mark, ensuring compliance with European safety and quality regulations.

Technical Specifications

Available in a variety of configurations to meet different needs, including rated currents from 6A up to 63A and rated residual operating currents from 0.03A to 0.3A. The device operates at a rated voltage of 240V for single phase and up to 415V for three-phase systems. It has a high short-circuit breaking capacity of 6000A, ensuring robust fault protection.

AC RCBO BREAKER MDB1LE-63 Technical Specifications
AC RCBO BREAKER MDB1LE-63 Mechanical and Electrical Life

Mechanical and Electrical Life

Designed for durability, the MDB1LE-63 can handle 20,000 mechanical cycles and 10,000 electrical cycles, providing long-term reliability.


AC RCBO BREAKER MDB1LE-63 Applications

The MOREDAY MDB1LE-63 AC RCBO is versatile enough for use in various sectors, including residential buildings, commercial complexes, and industrial installations where protection against both overcurrents and earth faults is necessary. It is particularly recommended for circuits requiring high reliability and safety, like those connected to heavy appliances or sensitive electronic equipment.

Advantages of Choosing Moreday

Selecting Moreday for your RCBO needs means partnering with a provider that understands the importance of safety and compliance in electrical systems.

Moreday’s products are renowned for their high quality and reliability, meeting rigorous international standards.

Additionally, Moreday offers exceptional customer service and technical support, ensuring that all your queries and technical needs are addressed promptly.






Type(wave form of the earth leakage sensed)


Thermo-magnetic release characteristic


Rated current In

6,10,16, 20,25,32 40,50,63A

Rated voltage Ue

230V AC(1P+N, 2P)400V AC(3P, 3P+N,4P)

Working Reserve Time

24hours charged can lasts 150 hours

Rated sensitivity lΔn

0.03, 0.05,0.1,0.3

Rated residual making and breaking capacity lΔm


Rated short-circuit capacity lcn


Break time under lΔn


Rated frequency


Rated impulse withstand voltage(1.2/50)Uimp


Insulation voltage Ui


Pollution degree


Electrical life


Mechanical life


Protection degree


Ambient temperature(with daily average≤35°C)


Storage temperature


Terminal connection type

Cable/Pin-type busbar


On DIN rail EN60715(35mm)by means of fast clip device


From top

popular questions


1. What is an RCBO and how does it differ from an MCB or RCCB?

An RCBO (Residual Current Circuit Breaker with Overload) is a protective device that combines the functions of an MCB (Miniature Circuit Breaker) and an RCCB (Residual Current Circuit Breaker). While an MCB protects against short circuits and overloads, an RCCB provides protection against earth faults. The RCBO ensures both protections are covered in a single unit, making it highly effective in safeguarding against electrical hazards.

2. How do I install the MDB1LE-63 RCBO in my electrical panel?

Installing the MDB1LE-63 RCBO involves switching off the main power, securing the device within the panel, and connecting the incoming and outgoing wires to the designated terminals. It is crucial to ensure all connections are tight and secure. For detailed steps and safety measures, refer to the installation manual provided with the product, or consult a professional electrician.

3. What should I do if my MDB1LE-63 RCBO keeps tripping?

If your RCBO trips frequently, it indicates potential issues such as persistent earth leakages or overloads in the connected circuits. First, try to reset the RCBO. If it continues to trip, disconnect some devices to see if the issue persists. If the problem remains, it may be necessary to check the wiring or consult with a professional to diagnose and resolve any underlying electrical issues.

4. Can the MDB1LE-63 RCBO be used for commercial applications?

Yes, the MDB1LE-63 RCBO is suitable for both residential and commercial applications. Its robust design and high breaking capacity make it ideal for environments with variable electrical loads and higher safety requirements, such as commercial buildings, hospitals, and schools.

5. What are the certification standards of the MDB1LE-63 RCBO?

The MDB1LE-63 RCBO complies with the IEC61009-1 standard and carries the CE mark, affirming its adherence to European safety and operational standards. These certifications ensure the device's reliability and performance in protecting electrical circuits.

6. How long is the warranty period for the MDB1LE-63 RCBO, and what does it cover?

The warranty period for the MDB1LE-63 RCBO typically covers defects in materials and workmanship under normal use. The length and specific terms of the warranty can vary, so it is advisable to review the warranty documentation provided at the time of purchase or contact Moreday's customer service for detailed information.

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