⎯⎯ Electrical Protection Devices
MCCB for Low-Voltage Protection
⎯⎯ At a Glance
Core Product Highlights
Device Role
Selection Core
Common Variants
Applications
Certified By
⎯⎯ Overview
What Is an MCCB?
Broader protection range
More configuration flexibility
Better fit for engineered systems
⎯⎯ Available Products
Current MCCB Models
General Modular Range
General Modular Range
General Modular Range
160A MCCB suited to higher-demand commercial or industrial low-voltage distribution roles.
General Modular Range
160A MCCB suited to higher-demand commercial or industrial low-voltage distribution roles.
General Modular Range
3-pole 250A MCCB for higher-current panel and feeder applications.
General Modular Range
3-pole 400A MCCB for industrial power distribution where stronger current direction is needed.
⎯⎯ Product Variants
Trip Units, Frames, and Accessory Options
Trip Logic
Configuration
Mechanical Format
Accessory Direction
| Variant direction | Application direction | Configuration focus |
|---|---|---|
| Thermal-magnetic MCCB | General low-voltage distribution, feeders, and conventional protection duties where simplicity and proven protection behavior matter. | Current rating, breaking capacity, trip curve behavior, and whether fixed or adjustable settings are needed. |
| Electronic trip MCCB | Projects that need more precise adjustment, improved coordination, or more advanced protection tuning. | Protection functions, setting range, accessory or communication requirements, and coordination goals. |
| Pole and frame selection | Applications where the breaker must match single-phase or three-phase system structure and panel layout. | Pole count, frame suitability, installation space, and downstream system requirements. |
| Accessory-ready series | Projects that require auxiliary signaling, remote trip, undervoltage functionality, or external operation hardware. | Accessory compatibility, mounting method, and documentation matched to the exact MCCB family. |
⎯⎯ Selection Guide
MCCB Selection Factors
Trip Logic
Configuration
Mechanical Format
Accessory Direction
| Selection factor | Why it matters | Selection focus |
|---|---|---|
| Rated current | Sets the continuous current direction of the breaker family. | Match load profile, margin policy, and thermal environment. |
| Voltage rating | Ensures the breaker is suitable for the system voltage and distribution arrangement. | Confirm installation voltage and application category. |
| Icu and Ics | Define the short-circuit interruption capability for the installation fault level. | Check the available fault current at the installation point before final device selection. |
| Trip unit type | Determines whether protection is fixed, thermal-magnetic, or electronic with adjustable logic. | Choose based on coordination, selectivity, and protection flexibility needs. |
| Pole count | Aligns the MCCB with single-phase or three-phase system structure. | Confirm whether the system needs 2P, 3P, or 4P direction by design. |
| Accessory requirements | Affects control integration, remote signaling, and operational method. | Review auxiliary contacts, shunt trip, undervoltage release, and handle requirements early. |
- Thermal-magnetic and electronic trip directions are available depending on coordination and setting requirements.
- Icu and Ics match installation fault level and protection-duty requirements.
- Space, poles, and accessory fit align with the final panel layout.
⎯⎯ Applications
Typical MCCB Applications
Panelboards and switchboards
Motor control and machinery
Relevant for equipment supply circuits where current duty, short-circuit capability, and coordination require stronger protection design.
Generator and backup power systems
HVAC, pumps, and larger loads
Suitable where equipment current levels and service conditions exceed the normal role of a miniature breaker.
Commercial EV and infrastructure projects
Applied where distribution protection, panel layout, and selectivity requirements become more demanding.
OEM panel-building projects
⎯⎯ Quick Comparison
MCCB vs MCB
| Device | Typical role | Main difference |
|---|---|---|
| MCB | Final circuits and smaller branch protection duties | Usually chosen for lower-current circuit protection with simpler device structure and settings. |
| MCCB | Feeders, larger loads, panels, and low-voltage distribution | Usually chosen when the system needs stronger interrupting capability, broader current direction, or more configurable protection behavior. |
⎯⎯ Workshop
VIOX MCCB WORKSHOP
⎯⎯ FAQ
Frequently Asked Questions
What is an MCCB used for?
An MCCB is used for low-voltage circuit protection in feeders, larger loads, sub-distribution, machinery supply, and other commercial or industrial applications where protection duties are more demanding than a typical miniature breaker.
What is the difference between MCCB and MCB?
An MCB is usually used for smaller final circuits, while an MCCB is used for larger loads, feeders, and more demanding protection duties that may require broader current direction or more advanced trip logic.
How is the right MCCB selected?
Selection is based on rated current, voltage, pole count, Icu and Ics, trip-unit type, accessory requirements, and the actual installation fault level.
Thermal-magnetic or electronic MCCB?
Thermal-magnetic MCCBs are commonly chosen for conventional protection duties, while electronic MCCBs are more relevant when the system needs greater setting flexibility, coordination, or advanced protection logic.
Can VIOX support OEM MCCB inquiries?
Yes. View the MCCB manufacturer page for OEM and private label supply information.
⎯⎯ Request Quote
Request a Quote for MCCB Products
Share your application, current direction, system voltage, pole count, and fault-duty expectations for product quotation and model confirmation.
