VIOX VMM3-250 3P 250A AC400V/690V Moulded Case Circuit Breaker (MCCB)

Moulded Case Circuit Breaker (MCCB) Manufacturer

VIOX Electric specializes in manufacturing Moulded Case Circuit Breakers (MCCBs), essential for protecting electrical circuits from overcurrent and short circuit faults. With over a decade of experience, VIOX Electric is committed to delivering innovative, high-quality electrical solutions for various sectors, including residential, commercial, and industrial applications.

Certified By

VIOX Moulded Case Circuit Breaker (MCCB)

vom6dc-320 MCCB

VOM6DC-320

VOM6DC-400 MCCB

VOM6DC-400

A Brief Self-Nomination: Why Choose VIOX Electric?

VIOX Electric operates ISO 9001:2025-certified facilities where every MCCB undergoes rigorous quality validation, including high-voltage arc testing and mechanical endurance cycles exceeding 15,000 operations.

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  • Industry-Leading Testing: Every VIOX MCCB undergoes rigorous 100% testing against international safety standards
  • Superior Quality Materials: Premium-grade components ensure longer lifespan and reliable performance
  • Engineering Innovation: Our R&D team continually enhances MCCB technology for improved protection
  • Global Certification: IEC, CE, UL, CCC, CB, TUV, and SAA certifications across our entire MCCB range
  • Comprehensive Support: From selection guidance to installation training and after-sales service

VIOX MCCB Outline dimensions and mounting dimensions

Our comprehensive MCCB dimensional portfolio is engineered to meet virtually every electrical installation requirement across industries. VIOX Electric provides detailed MCCB outline dimensions and mounting specifications for precise panel design and installation planning.

VOM6DC-250_2P

VOM6DC-250 2P

VOM6DC-320_2P Dimension

VOM6DC-320 2P

VOM6DC-320U/3P、VOM6AC-320/3P Dimension

VOM6DC-320U/3P|320/3P

VOM6DC-400U、630U、800U_2P Dimension

VOM6DC-400U|630U|800U-2P

VOM6AC-400_3P Dimension

VOM6AC-400-3P

VOM6AC-630、800_3P Dimension

VOM6AC-630|800/3P

VIOX MCCB Technical Performance

Specification VOM6DC-250 VOM6DC-320 VOM6DC-400 VOM6DC-630 VOM6DC-800
Frame VOM6DC-250 VOM6DC-320 VOM6DC-400 VOM6DC-630 VOM6DC-800
Pole 2 2/3 2 2 2
Rated Voltage Ue(V) DC500 DC1000/DC1500 DC1500 DC1500 DC1500
Rated Insulation Voltage Ui(V) DC1600 DC1600 DC1600 DC1600 DC1600
Rated Impulse Withstand Voltage Uimp(kV) 12 12 12 12 12
Rated Current In(A) 100/125/140/160/180/200/225/250 63/80/100/125/140/160/180/200/225/250/280/315/320 250/280/315/320/350/400 450/500/630 700/800
Ultimate Short-circuit Breaking Capacity Icu(kA) 20 20 20 20 20
Service Short-circuit Breaking Capacity Ics(kA) 20 20 20 20 20
Connection Mode Top incoming line and line out from bottom, bottom incoming line and line out from top
Utilization Category A A A A A
Arcing Distance(mm) >100 >100 >100 >100 >100
Isolation Function Yes Yes Yes Yes Yes
Ambient Temperature -35℃~+70℃ -35℃~+70℃ -35℃~+70℃ -35℃~+70℃ -35℃~+70℃
Mechanical Life 15000 15000 5000 5000 5000
Electrical Life 3000 2000/1500 1000 1000 1000
Standard IEC/EN 60947-2、GB/T 14048.2
Accessories Shunt trip, auxiliary contact, alarm contact, hand operator, motor operator
Certificate CCC、CB、CE、TUV、SAA
Size (L×W×H) mm 165×78×113 200×80×135(2P) / 200×114×135(3P) 270×125×169 270×125×169 270×125×169
Specification VOM6AC-320 VOM6AC-400 VOM6AC-630 VOM6AC-800
Frame VOM6AC-320 VOM6AC-400 VOM6AC-630 VOM6AC-800
Pole 3 3 3 3
Rated Voltage Ue(V) AC800/AC1140 AC800/AC1140 AC800/AC1140 AC800/AC1140
Rated Insulation Voltage Ui(V) AC1250 AC1250 AC1250 AC1250
Rated Impulse Withstand Voltage Uimp(kV) 12 12 12 12
Rated Current In(A) 63/80/100/125/140/160/180/200/225/250/280/315/320 250/280/315/320/350/400 450/500/630 700/800
Ultimate Short-circuit Breaking Capacity Icu(kA) M:36.5, H:50 M:36.5, H:50 M:36.5, H:50 M:36.5, H:50
Service Short-circuit Breaking Capacity Ics(kA) M:36.5, H:50 M:36.5, H:50 M:36.5, H:50 M:36.5, H:50
Utilization Category A A A A
Arcing Distance(mm) >100 >100 >100 >100
Isolation Function Yes Yes Yes Yes
Ambient Temperature -35℃~+70℃ -35℃~+70℃ -35℃~+70℃ -35℃~+70℃
Mechanical Life 15000 15000 5000 5000
Electrical Life 2000/1500 1500 1000 1000
Standard IEC/EN 60947-2、GB/T 14048.2
Certificate CCC、CB、CE
Size (L×W×H) mm 200×114×135 262×154×148 270×183×169 270×183×169

VIOX MCCB WORKSHOP

Get Your MCCB Sample

We provide samples, you just need to tell us what you need

More Than Just a MCCB Manufacturer

At VIOX, we go beyond manufacturing Moulded Case Circuit Breakers (MCCBs) by 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.

Service Consultation

Service Consultation

Whether your MCCB requirements are straightforward or complex, our team provides expert advice and technical consultation. For more intricate projects, we offer in-depth engineering support to ensure optimal product selection and application, guaranteeing safety and efficiency in your electrical systems.

VIOX VMM3-250 3P 250A AC400V/690V Moulded Case Circuit Breaker (MCCB)

Product Recommendations

Unsure which MCCB suits your system? Our specialists provide free, customized recommendations based on your specific operational and environmental requirements, ensuring you get the perfect fit for your electrical protection needs.

Logistics Support

Logistics Support

If you lack a reliable freight forwarder, we can arrange transportation from our factory to your project site at no extra cost. Our logistics team ensures timely and secure delivery to keep your project on schedule, minimizing downtime and delays.

Installation Support

Need help with installation? Our technical team is available to answer your questions or provide hands-on support. For larger projects, we can even dispatch an engineer to your site for on-the-ground assistance, ensuring your MCCBs are installed correctly and function seamlessly within your electrical network.

Frequently Asked Questions

We have compiled some common questions from our clients. If your question isn’t included here, our customer service is always available to help. We’d love to talk with you.

How Can I Get a Quote for the MCCB?

To get a quote for our MCCB, contact our customer service team. We are available 24/7. Just provide the specifics of your order like the type, frame size, voltage rating, and quantity. We’ll guide you through the entire ordering process.

What is Your MOQ for the Order?

We have a low MOQ or minimum order quantity. You can order as little as one unit, and we will deliver according to your specifications.

What Is the Turnaround Time for My Order?

The standard turnaround time for our MCCB is 7 to 10 business days. Delivery time may extend by up to 15 business days due to transit. For custom or bulk orders, we can discuss the turnaround time before finalizing your order.

Can I Get a Sample Before Placing the Order?

Yes, we provide samples for evaluation and approval. Creating samples typically takes 3 to 7 business days.

Can You Make Customized MCCB?

Yes, we offer customized MCCB. Let us know your requirements, and our expert customer service team will work with you through the design process.

What is Your Warranty for the MCCB?

We offer a 3-year warranty on all MCCB we produce. This ensures we deliver high-quality products. Every product is thoroughly tested before delivery.

Some About MCCB

What is MCCB?

A Moulded Case Circuit Breaker (MCCB) is a type of electrical protection device used to protect electrical circuits from damage caused by excess current from an overload or short circuit. The MCCB provides protection for electrical circuits by automatically switching off when it detects dangerous conditions.

Key features include:

  • Thermal Protection: Protects against overload conditions
  • Magnetic Protection: Provides instantaneous protection against short circuits
  • Adjustable Settings: Many MCCBs offer adjustable trip settings
  • High Breaking Capacity: Can interrupt high fault currents safely
  • Manual Operation: Can be manually operated for switching

MCCB vs. MCB vs. ACB

MCCB (Moulded Case Circuit Breaker):

  • Current rating: 15A to 2500A
  • Voltage: Up to 1000V AC/DC
  • Applications: Industrial and commercial
  • Features: Adjustable trip settings, high breaking capacity

MCB (Miniature Circuit Breaker):

  • Current rating: 0.5A to 125A
  • Voltage: Up to 400V AC
  • Applications: Residential and light commercial
  • Features: Fixed trip characteristics, compact size

ACB (Air Circuit Breaker):

    • Current rating: 800A to 10000A
    • Voltage: Up to 15kV
    • Applications: Heavy industrial and power distribution
    • Features: Draw-out design, sophisticated protection functions

How MCCBs Work

MCCBs operate using two main protection mechanisms:

Thermal Protection:

  • Bimetallic strip heats up during overload conditions
  • Strip bends when heated, triggering the trip mechanism
  • Provides time-delayed protection for overloads

Magnetic Protection:

  • Electromagnetic coil generates magnetic field during high current
  • Magnetic force triggers instantaneous trip for short circuits
  • Provides fast protection against dangerous fault currents

MCCB Selection Guide

When selecting the right MCCB for your application, consider these key factors:

Current Rating: Choose an MCCB with a current rating that matches or slightly exceeds your circuit’s maximum load current.

Voltage Rating: Ensure the MCCB voltage rating meets or exceeds your system voltage (AC or DC).

Breaking Capacity: Select adequate breaking capacity to safely interrupt the maximum prospective fault current at the installation point.

Trip Characteristics: Choose appropriate thermal and magnetic trip settings based on load characteristics and protection requirements.

Number of Poles: Select 1, 2, 3, or 4-pole configurations based on your electrical system requirements.

Application Environment: Consider ambient temperature, altitude, and environmental conditions that may affect performance.

Always consult with a qualified electrical engineer to ensure the MCCB meets your specific electrical system requirements and local regulations.

MCCB Applications

MCCBs find widespread application across various sectors:

Industrial Applications:

  • Motor protection and control
  • Distribution panels and switchgear
  • Heavy machinery and equipment protection
  • Process control systems

Commercial Applications:

  • Office buildings and shopping centers
  • Hospitals and educational facilities
  • Data centers and telecommunications
  • HVAC systems protection

Renewable Energy:

  • Solar power generation systems
  • Wind power installations
  • Energy storage systems
  • Electric vehicle charging infrastructure

Marine and Offshore:

  • Ship electrical systems
  • Offshore platforms
  • Port facilities
  • Marine terminals

MCCB Maintenance Essentials

To maintain MCCBs for optimal performance and longevity:

Regular Inspections:

  • Visual inspection for damage, corrosion, or loose connections
  • Check for proper mounting and secure installation
  • Verify nameplate data matches application requirements

Operational Testing:

  • Test manual operation mechanisms monthly
  • Verify trip functions using appropriate test equipment
  • Check auxiliary contacts and alarm functions

Cleaning and Lubrication:

  • Keep MCCB clean and free from dust and debris
  • Lubricate moving parts as per manufacturer recommendations
  • Ensure proper ventilation around the device

Professional Maintenance:

  • Schedule annual inspections by qualified technicians
  • Perform insulation resistance testing
  • Calibrate trip settings as required

Regular maintenance ensures safety, reliability, and extends the operational life of your MCCB installation.

Yueqing: MCCB Manufacturing Hub

Yueqing, a county-level city in Zhejiang Province, China, is recognized as one of the world’s largest manufacturing hubs for electrical protection devices, including Moulded Case Circuit Breakers (MCCBs). Known as the “Electrical Capital of China,” this city in the Wenzhou region has gained prominence due to its extensive network of electrical component manufacturers and advanced production capabilities.

The city’s dominance in MCCB manufacturing is driven by its high concentration of specialized factories, such as VIOX Electric, which focus on producing high-quality electrical protection devices. Yueqing boasts state-of-the-art manufacturing facilities with automated production lines and strict quality control measures. Its proximity to major transportation hubs like Wenzhou, Ningbo, and Shanghai ports ensures efficient global distribution. Additionally, the industry emphasizes research and development, offering customized OEM/ODM solutions while adhering to international standards like CE, RoHS, CCC, CB, TUV, and SAA certifications.

Request an MCCB

VIOX Electric is ready to assist you with your OEM MCCB needs. We offer high-quality and cost-effective solutions.

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