Zhejiang Dongan Electrical Co., Ltd. has been deeply involved in the MCCB field for 28 years: Why three core advantages make it the preferred choice for B-end buyers

In the highly competitive low-voltage electrical appliance market, B-end buyers always follow the core logic of "reliable quality, controllable cost, and accessible service" when choosing MCCB (molded case circuit breaker) and DC MCCB (direct current molded case circuit breaker). As one of the first domestic manufacturers involved in MCCB research and development, Zhejiang Dongan Electrical Co., Ltd. has built an unrepeatable competitive advantage in the traditional MCCB and emerging DC MCCB fields with 28 years of professional accumulation, and has become the common choice of leading customers in new energy, rail transit, industrial manufacturing and other industries.

1. 28 years of deep cultivation in the MCCB field: using time to precipitate professional value

Since the launch of the first MCCB product in 1997,Zhejiang Dongan Electrical Co., Ltd. has always been anchored in the molded case circuit breaker track, forming a complete product matrix covering AC MCCB and DC MCCB. Over the past 28 years, we have delivered more than 8 million MCCB series products, among which the market share of DC MCCB in DC power distribution scenarios such as energy storage and photovoltaics has ranked among the top three in the industry for five consecutive years:

Technology accumulation has achieved product strength benchmark:

·Dual-field technology reserves:Simultaneously deepen the short-circuit breaking technology of AC MCCB and the arc suppression technology of DC MCCB. The independently developed "intelligent arc extinguishing grid system" has increased the breaking speed of DC MCCB by 40% compared with traditional solutions. The relevant technology has been applied to CATL energy storage projects

·Full-scenario certification coverage:MCCB products have passed the dual national standards of GB/T 14048.2and IEC 60947-2. DC MCCB has also obtained international certifications such asSAA and TÜV to meet the access requirements of different global markets

·Industry standard participants: As one of the main drafting units of GB/T14048.2"DC Molded Case Circuit Breakers", we continue to promote DC MCCB Product standardization process

A rail transit equipment supplier commented: "In the DC 1500V power supply system of the 350 km/h high-speed rail, their DC MCCB has been running stably for 6 years, with a failure rate of less than 0.01%."

2. Direct supply from the source manufacturer: MCCB full-chain cost control expert

As a source enterprise with a 30,000 square meter MCCB exclusive intelligent manufacturing base, we realize the full process of self-production from copper busbar processing, insulation injection molding to whole machine assembly, which has significant cost advantages compared with brands that rely on outsourcing:✅Lower customization cost of DC MCCB: Through self-developed DC special arc extinguishing chamber molds (investment of more than 5 million yuan for a single set of molds), the cost of DC MCCB core components is reduced by 30%, and the price of products with the same parameters is only 60% of imported brands✅Large-scale production dividend:The annual production capacity of 300,000 AC MCCBs and 200,000 DC MCCBs enables us to have a large number of silver contacts (annual purchase volume of 5 million yuan). 18% discount on bulk purchase of common parts such as 100,000 pieces), electromagnetic releases✅Flexible production to adapt to small batches: In response to the needs of customers in emerging industries, the MCCB series supports trial production of DC MCCB samples with a minimum order of 50 units, and the proofing cycle is 25% shorter than that of peers

A photovoltaic inverter manufacturer's actual test data shows that when purchasing DC MCCBs of the same specification, choosing us saves 1.2 million yuan per year compared to purchasing other brands through agents, and the delivery time is shortened from 8 weeks to 3 weeks.

3. Quality leads the industry: Redefine MCCB performance benchmark

In terms of MCCB core performance indicators, our AC MCCB and DC MCCB have achieved key parameter surpassing. The following is the comparison data of third-party testing agencies in 2025:

MCCB series product core performance comparison

Hard-core support behind quality

·Dual laboratory guarantee:self-built AC MCCB electrical performance laboratory and DC MCCB DC arc extinguishing laboratory (equipped with 1500V/20kA DC test platform), each batch of products must pass 128 rigorous tests

·Material upgrade strategy: DC MCCB special insulation parts use imported modified nylon (temperature resistance 150℃), which is 30% longer than conventional materials; AC MCCB contacts use silver oxide tin alloy, and the conductivity is increased by 15%

·Smart production empowerment: MCCB production line introduces AI visual inspection system, real-time quality monitoring of 18 key processes such as arc extinguishing chamber assembly and tripping force calibration, and the factory defect rate is controlled below 0.03%

At present, our MCCB products have entered the qualified supplier system of international brands such as ABB and Schneider, and DC MCCB has become the designated product of Huawei data center and BYD energy storage power station.

Choose us, choose the certainty value in the MCCB field

In the context of supply chain reconstruction, Zhejiang Dongan Electrical Co., Ltd. provides B-end customers with triple certainty in MCCB procurement:

✔Technical certainty: 30 years of focus on MCCB research and development, 52 related patents have been obtained, and the core technology of AC and DC arc extinguishing has been mastered.

✔Cost certainty: Direct supply mode from the source manufacturer, the price of AC MCCB conventional models is 15% lower than the industry average price, and DC MCCB bulk purchases can enjoy another 10% discount.

✔Delivery certainty: 7 major storage centers have 50 million yuan of MCCB inventory, and the delivery time of DC MCCB customized orders is controlled within 4 weeks.

Contact us now to obtain the "MCCB Procurement White Paper", which contains AC/DC MCCB selection guides, cost comparison tables and typical case analysis for different application scenarios. 30 years of MCCB smart manufacturing experience is worth entrusting you with every breaking protection.