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MOREDAY AC MCB MDB1-125 220V-400V 1P-4P IEC 60947-2 CE certification.

  • Suitable for lighting system (type C) and motor power distribution system (type D)
  • Excellent and reliable performance, high breaking capacity
  • Rapid tripping, stable protection
  • High flame retardant and impact resistant shell
  • RoHS material

Stable Delvery Time

Technical Support

2 Years

AC Mini Circuit Breaker MDB1-125

AC Mini Circuit Breaker MDB1-125

Elevate your circuit protection system with the MDB1-100 AC Mini Circuit Breaker, designed for a versatile range of applications including industrial plants, commercial buildings, high-rise structures, and civil residences. This robust device not only safeguards against electrical hazards but also enhances system efficiency and reliability.

Advantages & Features

AC Mini Circuit Breaker Enhanced Safety

Offers three levels of short-circuit protection (B, C, D curves) to match varying electrical loads and conditions, ensuring optimal safety.

Current Limiting Design

Effectively minimizes the current during a fault, which reduces stress on the electrical system and increases its longevity.

Visibility and Control

Features a unique contact position indicator with a clear, color-coded system (red/green) to provide at-a-glance verification of breaker status.

Ease of Installation

Designed for quick and secure mounting on a DIN rail, facilitating faster setup and maintenance.

Technical Specifications

Rated Voltage: 230V (1P), 415V (2P to 4P)
Current Rating: Up to 125A
Poles: Available in 1P, 2P, 3P, 4P configurations
Rated Breaking Capacity: Icu=Ics=6000A, ensuring robust fault handling.
Rated Impulse Withstand Voltage: 6000V, for high resilience against voltage spikes.
Tripping Characteristics: Precisely engineered to respond within defined thresholds to prevent electrical damage.
Mechanical & Electrical Life: Capable of 8500 operations, guaranteeing longevity and reliability.
Protection Class: IP20 rating ensures protection against ingress of solid objects.
Compliance: Meets IEC 60947-2 standards and holds CQC certification

Applicable Scenarios

Commercial Facilities

Provides reliable protection for equipment in large shopping centers, offices, and hotels.

Industrial Applications

Ensures continuous operation and protects against electrical faults in manufacturing plants and industrial setups.

Residential Complexes

Safeguards home appliances and wiring from overload and short circuits in apartments and residential buildings.

Why Choose Moreday?

Quality Assurance

Our products are TUV, CE, and CB certified, ensuring top-tier quality and compliance with international standards.


We guarantee on-time delivery, backed by meticulous logistical planning and a robust supply chain.


We value our clients’ needs and offer customized solutions to meet the specific requirements of each project.






Rated Voltage Ue

1P: 230/400V~ 2/3/4P:400V~

Insulation Voltage Ui


Rated Frequency


Rated Breaking Capacity


Rated Impulse Withstand Voltage(1.2/50) Uimp


Dielectric Test Voltage At And Ind. Freq.for 1min


Thermo-magnetic Release Characteristic


Protection Degree


Ambient Temperature




popular questions


1. What type of applications is the MDB1-125 AC mini circuit breaker best suited for?

The MDB1-125 is ideal for a broad range of applications including industrial settings, commercial buildings, high-rise complexes, and civil residential structures. It is designed to protect electrical circuits from overload and short-circuit conditions effectively.

2. Can the MDB1-125 be customized for higher current ratings?

The current ratings for the MDB1-125 series extend up to 100A. For requirements beyond this, please contact our sales team to discuss custom solutions that can accommodate higher specifications.

3. What are the installation requirements for the MDB1-125 AC Miniature Circuit Breaker?

The MDB1-125 is designed for easy installation on standard DIN rails, which simplifies the setup process. It requires a clear space for proper connection and ventilation, and it should be installed by a qualified electrician to ensure safety and compliance with local electrical codes.

4. How does the MDB1-125 contribute to energy efficiency?

This breaker features a current limiting design that not only protects against electrical faults but also minimizes the duration and severity of fault currents. This reduces thermal and mechanical stress on the electrical system, thereby enhancing energy efficiency and reducing potential energy loss.

5. What certifications does the MDB1-125 hold?

The MDB1-125 complies with international standards and holds certifications such as IEC 60947-2 and CCC. This ensures that the product meets rigorous safety and performance criteria, making it a reliable choice for global markets.

6. What is the warranty period for the MDB1-125, and what does it cover?

The MDB1-125 comes with a standard 2-year warranty that covers defects in materials and workmanship under normal use conditions. Extended warranty options are available; please contact our customer service for more details.

7. How can I purchase the MDB1-125 AC Miniature Circuit Breaker?

The MDB1-125 can be purchased directly through Moreday's sales channels, including our website, authorized distributors, or at various trade shows where we are present. For bulk orders or custom requirements, please reach out to our sales team for personalized service.

8. What post-purchase support does Moreday offer?

Moreday provides comprehensive post-purchase support including technical assistance, troubleshooting, and warranty claims. Our dedicated customer service team is available to ensure your satisfaction and support the optimal performance of your product.

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