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Help CenterMoulded Case Circuit Breaker 40A 4P, Plastic Housing, Thermal-Magnetic Trip
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As a dedicated manufacturer of electrical protection solutions, Jinhua Dika Electrical Equipment Co., Ltd. is proud to present our high-performance Moulded Case Circuit Breaker (MCCB). This 40A, 4-pole unit with a robust plastic housing and reliable thermal-magnetic trip mechanism is engineered to provide dependable overcurrent and short-circuit protection in a wide range of commercial and industrial applications. Our commitment to quality manufacturing and rigorous testing ensures this breaker delivers consistent performance, safeguarding your electrical systems and equipment from potential damage.
This MCCB is designed for versatility and safety. The thermal-magnetic trip unit combines two protective functions: the thermal element provides protection against sustained overloads, while the magnetic element offers instantaneous tripping in the event of a short-circuit fault. This dual protection is critical for maintaining system integrity. The high-strength plastic housing offers excellent electrical insulation, impact resistance, and durability, making it suitable for various environmental conditions. Its compact design allows for efficient use of panel space, a key consideration for system designers and installers.
The technical specifications of this breaker are tailored for robust performance. Below is a summary of its key parameters:
| Parameter | Specification |
| Rated Current (In) | 40 Ampere |
| Number of Poles | 4 |
| Rated Operational Voltage (Ue) | 400V AC |
| Rated Insulation Voltage (Ui) | 800V AC |
| Ultimate Breaking Capacity (Icu) | Typically up to 10kA (subject to specific model) |
| Trip Unit | Thermal-Magnetic, Fixed |
| Housing Material | Engineering Plastic (Self-extinguishing) |
| Operating Temperature | -25°C to +55°C |
Key Advantages for Your Business:
- Reliable Protection: The proven thermal-magnetic technology ensures accurate tripping for both overloads and short circuits, minimizing downtime and equipment repair costs.
- Durable Construction: The plastic housing is resistant to corrosion, UV light, and mechanical impact, ensuring a long service life even in demanding environments.
- Easy Installation & Maintenance: Clear markings, accessible terminals, and a user-friendly operating mechanism simplify installation and future inspection procedures.
- Cost-Effective Solution: Offers a balance of performance and value, providing essential protection without unnecessary complexity, ideal for standard distribution panel applications.
- Wide Compatibility: The 4-pole design is suitable for three-phase systems with a neutral, commonly used in commercial buildings, workshops, and small industrial plants.
Trust in a product backed by a manufacturer with a solid track record. Jinhua Dika Electrical Equipment supports an annual export value in the range of US$1-1.5 Million, demonstrating our capability to meet international demand. Our products reach diverse markets across North America, South America, Europe, Asia, Africa, and Oceania, facilitated by major ports like Shanghai, Tianjin, Guangzhou, and Ningbo. Our operational framework is guided by a commitment to systematic management practices. This MCCB represents a reliable, practical choice for engineers and contractors seeking effective circuit protection. Contact us today to discuss how this component can enhance the safety and reliability of your electrical projects.
Frequently Asked Questions (FAQ)
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What is the main application for this 4-pole 40A MCCB?
This breaker is primarily used to protect three-phase electrical circuits (with neutral) in commercial and light industrial settings, such as distribution boards for offices, retail spaces, and small manufacturing equipment. -
How does the thermal-magnetic trip work?
It uses a bimetallic strip that bends and triggers a trip during prolonged overloads (thermal action). A separate solenoid reacts instantly to high short-circuit currents (magnetic action), providing two-tiered protection. -
Is the plastic housing safe and durable?
Yes. The housing is made from high-grade, self-extinguishing engineering plastic that provides excellent electrical insulation, is resistant to arcing, and can withstand typical industrial environmental stresses. -
Can the trip current be adjusted?
This model features a fixed thermal-magnetic trip unit. The trip characteristics are preset according to the 40A rating and are not field-adjustable. Models with adjustable settings may be available upon request. -
What standards does this MCCB comply with?
It is designed and tested to meet relevant international standards for circuit-breakers, such as IEC 60947-2. Specific certification marks can be confirmed with our sales team. -
What is the difference between Icu and Ics breaking capacity?
Icu (Ultimate Breaking Capacity) is the maximum fault current the breaker can interrupt once. Ics (Service Breaking Capacity) is a lower current it can interrupt multiple times. This product's Icu is specified; Ics is typically a percentage of Icu. -
Do you offer different mounting options?
Yes. This MCCB can be supplied in a fixed mounting version for direct panel mounting or a plug-in version for easier replacement and maintenance. Please specify your requirement when inquiring. -
What is the lead time for an order?
Lead times vary based on order quantity and current production schedule. As a manufacturer, we can often provide competitive lead times. Please contact us with your specific needs for a precise quotation and delivery estimate.
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