Molded Case Circuit Breaker (MCCB) Units
-- Steady & Reliable Manufacturer --
Product Overview
Molded Case Circuit Breaker (MCCB) Units are the versatile "Workhorses" of electrical distribution, providing protection for circuits from 15A up to 1600A. At DSJ Electrical, our MCCB units are housed in a robust, compact molded case made of high-strength insulation material, combining the functions of a switch, an overload protector, and a short-circuit isolator. These units are the standard choice for sub-distribution boards, motor control centers, and commercial panelboards. We offer MCCBs with both thermal-magnetic and advanced electronic trip units, allowing for precise protection of cables, motors, and sensitive electronic loads. Our MCCB range features high breaking capacities in a small frame size, making them ideal for space-constrained installations. With a "Plug-and-Play" design and a wide range of accessories (such as shunt trips and auxiliary contacts), DSJ MCCB units provide the flexible, reliable, and cost-effective protection required at every level of the low-voltage network.
Electrical Partner
At DSJ, we transform complexity into reliability. With 42+ years of expertise in power distribution systems, our turnkey service integrates every phase – from regulatory compliance to final commissioning – ensuring seamless project execution for global clients. Whether it is the initial design or the final handover, we will strictly control every detail to ensure that the final delivered products perfectly meet your expectations. With us, you can focus on your core business with peace of mind, knowing that your project is in the hands of professional and reliable partners.
Introduction
The Molded Case Circuit Breaker (MCCB) Unit line from DSJ Electrical Co., Ltd is engineered for "Precision Protection." We recognize that while the ACB handles the main power, the MCCB is what protects the individual machines and office wings that drive your business. Our introduction of this series focuses on "Trip Reliability" and "Environmental Resilience." We utilize specialized thermoplastic resins for our casings that are fire-retardant and resistant to chemical exposure. Our manufacturing process involves automated laser-calibration of the trip mechanisms, ensuring that every MCCB we ship reacts exactly according to its time-current curve.
Innovation at DSJ involves "Digital MCCBs." Our high-end MCCB units feature integrated micro-controllers that can detect "Arc Faults" and "Ground Leaks" before they cause a fire. These units can be networked to provide a complete "Map" of your building's energy consumption. We prioritize "Operator Convenience," with ergonomic toggles and clear "Trip/Off/On" status indicators. At DSJ, we provide our MCCBs in various poles (2P, 3P, 4P) and configurations (fixed or plug-in), ensuring that our hardware fits your specific panelboard layout perfectly. Choosing our MCCB units means choosing a legacy of safety and a future of intelligent power management. We provide the "Reliable Link" between your main power source and your most valuable equipment.
Applications
- Sub-Distribution: Branch circuit protection for office floors and wings.
- Motor Protection: Specialized MCCBs with high inrush current tolerance.
- HVAC Systems: Protecting large-scale chillers and AHUs.
- Industrial Machinery: Localized protection for CNC machines and conveyors.
- Solar Combiner Boxes: High-voltage DC MCCBs for renewable arrays.
- Retail Distribution: Managed power for shopping mall tenants.
Specifications
| Technical Feature | MCCB Specification |
|---|---|
| Rated Current (In) | 15A to 1600A |
| Breaking Capacity (Icu) | 25kA to 100kA at 415V |
| Voltage Rating | Up to 690V AC / 1000V DC |
| Trip Type | Thermal-Magnetic or Electronic (Microprocessor) |
| Poles | 2P, 3P, 4P |
| Mounting | Fixed, Plug-in, or Draw-out |
| Standard | IEC 60947-2 / GB 14048.2 |
Why Choose Us
DSJ Electrical provides "Tier-1 Protection" at a "Factory-Direct Price." We manufacture our own high-performance MCCBs while also offering the ability to integrate your preferred global brands. Our focus on "Digital Integration" ensures that your MCCBs are ready for the era of smart buildings and IOT energy management.
- Q: What is the difference between an MCB and an MCCB?
- A: MCBs are for low-current domestic use; MCCBs are for higher currents and industrial applications.
- Q: Can an MCCB be used in DC systems?
- A: Yes, we offer specialized DC-rated MCCBs for solar and battery storage applications.
Advantages
- Compact Footprint: High breaking capacity in a small, modular frame.
- Cost-Effective: The most economical high-performance protection.
- Versatile Accessories: Easy to add remote tripping and status signaling.
- Adjustable Trip Settings: Allows for fine-tuned protection of specific loads.
- High Durability: Sealed construction prevents dust and moisture ingress.
- Global Standard: Compliant with all major international electrical codes.
Standards & Certifications
Our MCCBs are CE marked and compliant with IEC 60947-2. We hold CB, CCC, and TUV certifications. Every batch is subjected to a "Routine Calibration Check" and insulation test to ensure consistent performance in the field.
Payment & Shipping
MCCBs are shipped in high-impact individual boxes or pre-installed in DSJ panelboards. We offer express courier shipping for component orders and sea freight for bulk project orders. Lead times are 2-4 weeks.
DSJ Story
about DSJ
Building Power, Building Trust
Founded in 1983, DSJ is a leader in China's power distribution equipment. Headquartered in Beijing as the top-selling enterprise, we integrate manufacturing with trade and maintain full in-house capabilities in R&D, production, and sales. This enables efficient fulfillment of custom orders with industry-leading speed.
As a producer of distribution system, transformer, generator and photovoltaic products exceeding Chinese/international standards, DSJ supplies medium/low-voltage electrical equipment, and PV systems. For over four decades, we have delivered high-safety electrical solutions globally to public infrastructure, corporations, and households – achieving the industry's lowest return rate.
Committed to "meeting diverse needs through quality", DSJ leverages expert teams to provide one-stop services: pre-sales consultation & customization, flexible logistics/payment options, and reliable maintenance – ensuring seamless producer-maintainer-customer collaboration.
+86 18513032986 
FLC Center, Chaoyang District, Beijing, China