Our Molded Case Circuit Breaker Types
Thermal Magnetic MCCB
Electrical Trip MCCB
MCCB Design & Customization Options
We provide flexible MCCB solutions tailored to different electrical system requirements.
Adjustable Protection Settings
Allows precise coordination with system protection schemes.
Compact and Robust Design
Durable molded case enclosure for industrial use.
Accessory Integration
- Auxiliary contacts
- Shunt trip
- Under-voltage release
How to Choose the Right MCCB
Selecting the right MCCB is critical for ensuring system protection and operational safety.
- Rated Current Selection
Choose based on load requirements and system capacity.
- Breaking Capacity
Ensure it matches or exceeds the system fault current.
- Trip Unit Type
Thermal-magnetic vs electronic trip units.
- Protection Settings
Adjustable settings for precise coordination.
- Installation Environment
Industrial, commercial, or harsh operating conditions.
Why Choose Our Molded Case Circuit Breakers
Years of Manufacturing Experience
Custom Engineering
In-house Engineering Team
Strict Quality Control
Global Export Projects
Fast Lead Time
Technical Specifications of Molded Case Circuit Breakers
Our MCCBs are designed for high performance, reliability, and safety in demanding environments.
Electrical Ratings
- Rated voltage: up to 1000V
- Rated current: 16A to 1600A+
- Breaking capacity: up to 100kA or higher
Protection Features
- Overload protection
- Short circuit protection
- Adjustable trip settings
- Ground fault protection
Operating Mechanism
- Manual operation
- Motorized operation
- Remote control capability
Applications of Molded Case Circuit Breakers
Project References & Global Applications
“The MCCBs from Wondon have significantly improved the safety of our electrical panels. They are robust, easy to install, and have been performing flawlessly under heavy load conditions.”
“We installed custom MCCBs for our industrial machines, and the difference is clear. The protection features are reliable, and the engineering team helped us select the right models for each application.”
“These molded case circuit breakers are durable and simple to maintain. Their performance has been consistent, giving us confidence in the safety of our operations.”
FAQs About Molded Case Circuit Breakers
1. What is a molded case circuit breaker (MCCB)?
A molded case circuit breaker (MCCB) is a protective switch for low-voltage electrical systems, designed to safely interrupt overloads, short circuits, and electrical faults.
2. What are the main applications of MCCBs?
Used in industrial plants, commercial buildings, distribution panels, and motor control systems to protect circuits and equipment from electrical faults.
3. What are the main components of an MCCB?
Key components include the casing, contacts, thermal-magnetic trip unit, operating handle, auxiliary contacts, and arc extinguishing mechanism.
4. What protection functions does an MCCB provide?
It provides overload protection, short-circuit protection, phase-to-phase and ground fault protection, and can include auxiliary features like under-voltage release or alarms.
5. How to select the rated current for an MCCB?
Select based on load current, inrush current characteristics, line length, and ambient temperature, leaving some safety margin.
We are the Wondon sales team. Share your project details and requirements with us, and we’ll provide timely consultation and quoting services.
Qiang Chen
Chief Executive Officer
Tracy Lee
Operations Specialist
Hannah Wu
Sales
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