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As a dedicated manufacturer, Jinhua Dika Electrical Equipment Co., Ltd. specializes in providing reliable and efficient electrical protection solutions. Our 40A 4 Pole Molded Case Circuit Breaker (MCCB) is engineered specifically for the demanding environments of commercial building electrical systems. This robust device is designed to offer superior overcurrent and short-circuit protection for three-phase power distribution networks, ensuring the safety and continuity of critical operations in offices, retail spaces, hotels, and other commercial facilities. We combine rigorous manufacturing processes with a commitment to quality, delivering a product that meets the precise needs of electrical contractors, system integrators, and building managers.
The core value of this MCCB lies in its ability to safeguard electrical installations and connected equipment from damage due to overloads and fault currents. Its four-pole design is essential for systems requiring complete isolation of all live conductors, including the neutral, which is crucial for safety during maintenance and in certain fault conditions. Built with durability and long service life in mind, this breaker is a cornerstone for building a resilient and code-compliant electrical infrastructure.
Key Features and Technical Advantages:
- Precise Protection: Features a reliable thermal-magnetic trip unit. The thermal element provides delayed protection against sustained overloads, while the magnetic element offers instantaneous tripping for dangerous short-circuit currents, minimizing potential damage.
- Robust Construction: The molded case is made from high-strength, arc-resistant materials, ensuring mechanical integrity and containing internal arcing safely, which enhances overall system safety.
- Flexible Configuration: Available in both fixed and plug-in versions to suit different panelboard designs and simplify installation or replacement procedures.
- Clear Status Indication: Equipped with a clear ON/OFF trip indicator, allowing for quick visual confirmation of the breaker's status, which aids in troubleshooting and operational checks.
- Secure Connection: Designed with reliable screw or stud terminals that ensure a secure and low-resistance connection for cables, reducing the risk of overheating at connection points.
- High Performance: Engineered to offer consistent performance across a wide range of ambient temperatures commonly encountered in commercial building electrical rooms.
Technical Specifications Table:
| Parameter | Specification |
| Rated Operational Current (In) | 40 A |
| Number of Poles | 4 |
| Rated Operational Voltage (Ue) | AC 415V / 440V (Typical) |
| Rated Insulation Voltage (Ui) | 800V (Typical) |
| Trip Unit Type | Thermal-Magnetic (Standard) |
| Mechanical Durability | 10,000 operations minimum |
| Electrical Durability | 5,000 operations at In (Minimum) |
| Mounting | DIN Rail Mountable (35mm) |
Benefits for Your Commercial Project:
- Enhanced System Safety: Provides comprehensive protection for 3-phase and neutral conductors, reducing fire risks and equipment damage, thereby protecting your capital investment.
- Operational Reliability: Minimizes unexpected downtime by reliably disconnecting faulty circuits, helping to maintain business continuity for your clients.
- Simplified Compliance: Aids in meeting electrical safety standards and codes required for commercial building certifications.
- Ease of Installation & Maintenance: The standardized design and DIN rail mounting facilitate quick installation and easy integration into existing or new distribution boards.
- Cost-Effective Solution: Offers a balance of performance, durability, and value, providing long-term protection without excessive upfront cost.
Jinhua Dika Electrical Equipment supports its products with a robust operational framework. Our annual export value reflects a consistent global demand and trust from partners in regions including North America, Southeast Asia, Europe, and the Middle East. We leverage multiple major ports like Shanghai, Tianjin, and Ningbo to ensure efficient and flexible logistics for our international clients. Our commitment to structured manufacturing is supported by a focus on systematic quality management processes. For this 40A 4 Pole MCCB, this translates into a product that is manufactured with attention to detail, aiming for reliable performance in the field. We invite you to consider this breaker as a dependable component for your next commercial electrical system project. Contact us today to discuss your specific requirements, request detailed technical data sheets, or to place a sample order and evaluate its performance firsthand.
Frequently Asked Questions (FAQ):
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Q: What is the main application for a 4-pole MCCB versus a 3-pole one?
A: A 4-pole MCCB is used in electrical systems where it is necessary to isolate the neutral conductor along with the three phase conductors. This is critical for safety during maintenance, in TT or IT earthing systems, and where the neutral may carry significant harmonic currents that require protection. -
Q: Can this 40A MCCB be used as a main breaker for a small commercial unit?
A: Yes, it can serve as a suitable main incoming breaker or sub-main feeder protection for smaller commercial units, retail shops, or office suites, depending on the total calculated electrical load. -
Q: What is the breaking capacity (Icu) of this breaker?
A> The specific breaking capacity can be customized based on application requirements. Please contact us with your system's prospective short-circuit current level so we can provide the most appropriate model. -
Q: Is this MCCB available with an electronic trip unit?
A> While the standard version features a thermal-magnetic trip unit, electronic trip units with adjustable settings are often available as an option for applications requiring more precise and configurable protection characteristics. -
Q: How do I mount this breaker in a panel?
A> It is designed for easy mounting on a standard 35mm top-hat DIN rail, which is common in commercial distribution boards and panelboards. Fixed and plug-in versions offer installation flexibility. -
Q: What are the typical ambient temperature limits for operation?
A> Standard MCCBs are generally rated for operation in ambient temperatures ranging from -5°C to +40°C, with derating possibly required outside this range. Confirm specific details in the product data sheet. -
Q: Do you provide auxiliary contacts or shunt trip accessories for this model?
A> Accessories like auxiliary contacts (for remote signaling), shunt trip coils (for remote tripping), and under-voltage releases are commonly available to enhance functionality. Inquire for specific accessory compatibility. -
Q: What is the lead time for an order of these MCCBs?
A> Lead times vary based on order quantity, configuration (standard vs. customized), and current production schedules. We strive to provide efficient turnaround, especially for standard specifications.
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