Autonomous Innovation

Miniature Circuit Breaker (MCB)

Miniature Circuit Breakers (MCBs) are widely used protective devices in low-voltage electrical distribution systems. Their main function is to prevent damage to wires, cables, and electrical equipment caused by overloads or short circuits, ensuring a safe and reliable power supply.

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10 Million Tests

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Customize Your Miniature Circuit Breaker System

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Download MCB PDF Catalog

Why Choose

KORLEN Miniature Circuit Breaker (MCB)

Have a self-developed appearance design patent.

The shell is made of flame-retardant, environmentally friendly, and safe materials. Flame retardant grade up to V1.

The product can not only be matched with accessory series products but also can be matched with reclosing module to realize automatic reclosing function.

  • Rated current: 1~125A
  • Rated voltage: 220/240/415VAC  250/500/1000/1500VDC
  • Number of poles: 1-4 poles
  • Rated breaking capacity: up to 3KA/4.5KA/6KA/10KA
  • Rated impulse withstand voltage: 6KV
    Mechanical life: 8000 times
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MCB Applications

MCBs find extensive use in various applications, ensuring the safety and reliability of electrical systems across different sectors

Power Transmission And Motor Protection

Preventing damage to electric motors and power transmission systems

Laboratories And Medical Equipment

Protecting sensitive electronic devices and medical equipment from electrical damage

Renewables Energy Systems

Ensuring the safety and stability of solar, wind,and other clean energy installations

Minimalist Kitchen Interior Design

Protect residential and commercial building final distribution circuits from overloads and short circuits

Data Centers And Telecom Base Stations

Maintaining uninterrupted operation of critical it and communication equipment

Electric Vehicle Charging

Protecting control circuits and equipment from excessive currents

Miniature Circuit Breaker Types

KORLEN Miniature Circuit Breakers have an extra wide and complete range of MCBs to cover most applications and markets.

KNB2-63 S2 2

KNB2-63 S2

Standard rack installation is provided, it is mainly used in circuits with AC 50/60 Hz, rated working voltage 220V/240V/415V and rated current 6A-63A to prevent overload and short circuit. It can also be used for frequent starting and switching work.

KNB2-63 S3 DC C63 1P 1

KNB2-63 S3 DC C63

It is easy to use and can be installed on a standard DIN rail. It is mainly suitable lines with a rated working voltage of 250V. The rated current is increased to 63A to prevent overload and short circuit. It can also be used for occasional starting and switching.

KNB2-63DC 2P 1

KNB2-63DC

KNB2-63 DC circuit-breakers are used in communication systems and PV DC systems.It is rated working voltage to 250/500/1000V, and rated current to 63A as protection short-circuit. It can be used as infrequentl on-and-off operation and change .

KNB2-125DC 11

KNB2-125DC

KNB2-125 DC support 1P/4P multi-pole configurations.The highest configuration can reach a rated current of 125A,a rated voltage range of 250V – 1500V ,and a high breaking capacity of 10kA.It meets the IP20 protection level and ±20% rated operating time accuracy.

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SGS & ISO Audited

“Quality is the life of an enterprise”, The entire production process is controlled by the ISO9001 quality assurance system. We ensure that every material used in the product is strictly inspected in the selection, processing, production and commissioning stages. So that the factory’s qualification rate can reach 100%

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0% Quality Complaint

KORLEN executing 100% final inspection protocols on industrial electrical equipment to guarantee zero-defect performance. Our vertically integrated quality control system – spanning raw material screening, precision processing, assembly verification, and pre-shipment diagnostics – maintains 100% compliance with ISO9001 standards.

Leading Supplier of Miniature Circuit Breakers

Korlen Solar Canton Fair 26

We don’t just hire the best professionals to handle our post-production, planning, and manufacturing processes. We also invest in cutting-edge technology to keep us at the forefront of innovation in our production process.

 

Standard workshops, spacious workshops, clean environment, and meticulous production provide quality assurance for the production process of each product.
Customer-centricity, pursuit of the highest quality and lowest cost are two basic points.
We are proud of our excellent quality, and our products have obtained international certifications and recognition, including ISO 9001, ISO 14001, CB, CE, Semko, NF, SNI and TSE certifications.

 
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Korlen Factory Building

Established in 1985, it covers a floor area of nearly 38000 square meters and employs about 1000
employees. It is specialized in the independent research and development, manufacturing and sales
of mini circuit breakers(MCB), residual current cicuit-breaker with integral overcurrent protection(RCBO),residual current circuit breakers(RCCB),AC contactors, molded case circuit breakers(MCCB)and many other electrical safety devices.
In line with the business concept of “quality and customers come first”, we have always taken product quality as priority and established honest business, for which reason we are well recognized by all our customers. Our ‘products are sold as far as Malaysia, Russia, Turkey, Argentina, Brazil, Pakistan,Indonesia and France.
We sincerely welcome all customers to establish closer contact with us andbecome our good friends and partners so that we can work together for a better future!

FAQs

Does KORLEN provide supply services for the international market?

we provide satisfactory service to all stakeholders across the globe. our frequent and reliable responds to customers are in less than 24 hours after receiving an enquiry

Our products usually have a standard warranty period of 18 months, and the specific terms may vary depending on different products and customer agreements.

Depending on whether you want to customize the product, as well as the speed of customs clearance and logistics, the transportation time depends on
The transportation method varies, and sea freight usually takes 40-45 days.

Get A Quotes

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