AC400V 125A Molded Case Circuit Breaker

In modern industrial electrical environments, reliable overload and short-circuit protection is crucial for maintaining production continuity. The Greenwatt AC400V 125A Molded Case Circuit Breaker features a high-strength, flame-retardant housing, maintaining structural integrity and insulation performance under harsh operating conditions.

This MCCB is suitable for AC 50/60Hz circuits with a rated voltage of 400V and a rated current up to 125A, and is widely used in distribution cabinets, motor control centers, and various automated control systems.

Core Technological Advantages

1. Enhanced Thermal-Magnetic Protection System

The Greenwatt AC400V 125A Molded Case Circuit Breaker is equipped with a precise dual tripping mechanism:

Thermal Trip: Provides delayed protection against sustained overloads, effectively preventing cable damage due to overheating.

Magnetic Trip: Upon encountering a short circuit, the electromagnetic mechanism responds immediately, rapidly cutting off the current to protect downstream expensive electrical equipment.

2. High Breaking Capacity Design

Our R&D team has improved the product's ultimate short-circuit breaking capacity by optimizing the arc-extinguishing chamber structure. Even in the event of a severe power grid failure, this switch can safely interrupt the arc, preventing the accident from escalating.

3. Environmental Adaptability and Durability

The housing, made of engineering plastics, not only possesses extremely high heat resistance but also strong impact resistance. Internal conductive components undergo anti-oxidation treatment, ensuring low contact resistance even in humid or dusty industrial environments.

Manufacturing Strength and Quality Assurance

Our production base (Zhejiang Dong'an Electric) boasts nearly 30 years of industry experience and is a modern enterprise integrating R&D, design, and manufacturing.

Precision Equipment: The production line is equipped with advanced medium-speed punch presses, automatic assembly lines, and a complete set of testing equipment, including short-circuit current testers and overload characteristic calibration benches.

System Certification: The company has passed ISO9001, ISO14001, and ISO45001 system certifications.

Environmental Standards: An on-site RoHS 2.0 laboratory is available; all Greenwatt AC400V 125A Molded Case Circuit Breakers comply with environmental directives.

Typical Application Scenarios

Industrial Automation: Provides end-point protection for PLC control cabinets and production line power buses.

Commercial Buildings: Main incoming line switch or branch protection for office buildings and shopping mall distribution boxes.

Infrastructure: Low-voltage power distribution systems for water treatment plants, power substations, and communication base stations.

Frequently Asked Questions (FAQ)

Q: Does this 125A MCCB support motor protection?

A: Yes. The Greenwatt AC400V 125A Molded Case Circuit Breaker is commonly used in motor control centers (MCCs) for short-circuit and isolation protection of power distribution lines.

Q: Do you offer OEM or customized services?

A: We have a professional R&D team that can develop and produce products based on customer-provided drawings or samples. From mold design to metal stamping and finished product assembly, we provide a one-stop solution.

Q: Does the product have relevant international safety certifications? A: All our MCCB products have obtained CE, CB, TUV and CCC certifications to ensure compliance with the market access standards of our target markets. Technical Specifications

Technical Specifications