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The Moreday 63A DC Miniature Circuit Breaker (MCB) is designed with outstanding current-limiting and arc-extinguishing capabilities. It offers precise protection for solar systems and dc application against overload, short circuits, and other electrical faults.

  • 1P/2P/3P/4P
  • According to IEC 60947.2
  • Breaking capacity: 6kA(High)
  • High quality Arc extinguishing barrier
  • PC enclosure is optional

Stable Delvery Time

Technical Support

2 Years

MOREDAY MDB1Z-63 DC mini circuit breaker


Moreday’s 63A DC mini circuit breaker (DC MCB Miniature Circuit Breaker) is a high-quality device designed to provide excellent protection for DC circuits. Tailored for solar and automotive applications, this DC MCB ensures reliability and safety for your electrical systems.

Advantages and Features

MDB1Z-63 DC mini circuit breaker High Current Rating

High Current Rating

The 63A DC mini circuit breaker offers robust protection against overloads and short circuits, safeguarding your equipment and systems.

High Voltage Capacity

With a high DC voltage rating, this DC MCB can effectively protect your circuits from overcurrent and short-circuit situations.


The DC circuit breaker is IEC and CE certified, which assures you of its top-notch quality and adherence to international standards.

Compact Design

Its compact size makes it easy to integrate into various distribution boxes and systems, maximizing space efficiency.

Reliable Performance

Built with durable materials and advanced technology, this DC MCB offers consistent performance, safeguarding your electrical components.

High Reliability

The 63A DC mini circuit breaker offers robust protection against overloads and short circuits, safeguarding your equipment and systems.

Accurate Tripping

It features a thermal magnetic tripping mechanism that ensures quick and precise response.


With an electrical life exceeding 1500 cycles and a mechanical life over 10,000 cycles, this MCB is built for durability.

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DC Circuit Breaker Internal Display

DC Circuit Breaker Internal Display1


Applicable Scenarios

Solar Power Systems: Ideal for protecting solar panels and DC circuits from faults and ensuring smooth operation.

Automotive Systems: Suitable for electric vehicles and other automotive applications requiring DC protection.

DC Distribution Boxes: Perfect for integration into DC distribution boxes where reliable protection is crucial.

Why Choose Moreday?


With over 15 years of industry experience, Moreday is a trusted partner for solar and electrical solutions.

Global Reach

The company has successfully exported to over 100 countries, supporting a diverse client base.

Customer Focus

Moreday provides tailor-made services to meet specific customer needs and has a customer-centered service system.


Committed to advancing sustainable energy solutions, Moreday strives to bring clean energy to all parts of the world.






Rated Working Voltage Ue

250V/600V/800V/1000V DC

Frame Current


Rated Current In

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

Rated Insulation Voltage Ui


Rated Impulse Withstand Voltage Uimp


Tripping Characteristics


Tripping Type

Thermal Magnetic

Rated Ultimate Short-Circuit Breaking
Capacity Icu


Rated Service Short-Circuit Interrupting
Capacity Ics


Electrical Life

> 1500 Cycles

Mechanical Life

>10000 Cycles

Overvoltage Category


Pollution Degree


Ingress Protection

IP40,Wiring port IP20

Resistance to humidity and heat

Class 2

Relative Humidity

≤ 95 %


acc. to IEC60068-2-6


acc. to IEC60068-2-27

Terminal capacity


Fastening Torque of Terminals

2.0~3.5 Nm

Ambient Temperature


Storage Temperature


Installation Method




popular questions


1.What makes the Moreday 63A DC MCB unique?

The Moreday 63A DC MCB stands out for its high-quality protection against overcurrent, robust design, and compliance with international safety standards such as CE, CB, and IEC. It also features a thermal magnetic tripping mechanism for accurate response to faults.

2. What is the rated voltage for the Moreday 63A DC MCB?

The Moreday 63A DC MCB is rated for 800V/1000V DC, making it suitable for various applications, especially in solar power systems.

3. What are the environmental conditions that the Moreday 63A DC MCB can withstand?

This MCB operates efficiently in temperatures ranging from -30°C to 70°C, with IP40 protection for the housing and IP20 for the wiring ports, suitable for a range of environmental conditions.

4.What tripping characteristics does the Moreday 63A DC MCB offer?

The MCB comes with B/C tripping characteristics, providing reliable protection against both overload and short circuit conditions.

5. How does the Moreday 63A DC MCB ensure customer safety?

The MCB is equipped with thermal magnetic tripping technology, which ensures quick and accurate disconnection during fault conditions, providing optimal safety for customers.

6. How durable is the Moreday 63A DC MCB?

The MCB has an electrical life exceeding 1500 cycles and a mechanical life exceeding 10,000 cycles, demonstrating its durability.

7. In what applications can the Moreday 63A DC MCB be used?

The MCB is ideal for solar power systems, industrial control panels, and other renewable energy applications where DC circuit protection is crucial.

8. How does the Moreday 63A DC MCB contribute to sustainability?

Moreday is committed to advancing clean energy solutions. The MCB is part of the company’s efforts to provide reliable, sustainable energy products that reduce carbon footprints and promote a greener planet.

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