DC MCCB Molded Case Circuit Breaker 500V – 63A to 250A 2P for Solar Batteries, Charging Stations and Photovoltaics

DC MCCB Circuit Breaker 500V – 2P Molded Case, 63A to 250A for Solar Systems and Charging Stations

The MCCB DC 500V molded case circuit breaker is designed to ensure safe power distribution and overload and short circuit protection in solar systems, batteries or charging stations. Compliant with IEC60947-2 standard, this high-performance model supports up to 250A in 2 poles, with excellent insulation and breaking capacity.

⚙️ Technical characteristics:

• Available currents: 63A, 80A, 100A, 125A, 160A, 180A, 200A, 225A, 250A
• Operating voltage: 500V DC (max 600VDC)
• Number of poles: 2P (bipolar)
• Protection type: overload and short circuit
• Type: MCCB (Moulded Case Circuit Breaker)
• Impulse voltage: 8kV
• Frequency: 50/60 Hz
• Standard: IEC60947-2 / GB14048.2

🔌 Recommended use:

• Protection of solar batteries (LiFePO4, AGM, etc.)
• DC charging station for electric vehicles
• Switching in professional or industrial photovoltaic systems
• Protection of direct current lines in solar boxes

A professional choice for the safety of high power DC systems up to 500V.

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2P 500V 125A DC Molded Case Circuit Breaker (MCCB) for Industrial Applications

The DC MCCB 2P 500V 125A molded case circuit breaker is positioned as an essential element in the protection of direct current electrical installations, particularly in the photovoltaic and industrial sectors.

Adapted to the strict requirements of these fields, this circuit breaker offers the capacity to handle high voltages of up to 1500V DC and nominal currents that can reach or exceed 250A depending on the model.

Its main function is to protect circuits against overloads and short circuits, thus ensuring rapid and safe interruption of current. This device is distinguished not only by its robustness, but also by its compactness and ease of installation, meeting the growing needs for safety and reliability in energy storage, solar systems, and demanding industrial environments.

Among the technical characteristics that make the MCCB strong, it is worth mentioning:

• Handling high continuous currents up to 250A and more, with a nominal voltage of up to 1500V DC.

• Optimized interruption capacity to ensure effective protection against short circuits and overloads.

• Molded housing made of flame-retardant materials, ensuring resistance to UV and environmental stresses, with IP66 options for enhanced protection.

• Silver alloy contacts guaranteeing high conductivity and endurance against electric arcs during cuts.

• Compatibility with 35 mm DIN rails for quick and easy integration into existing electrical cabinets.

Characteristic	Typical Value	Description
Nominal voltage	500V - 1500V DC	Suitable for photovoltaic and industrial systems
Nominal current	125A - 250A+	Provides circuit protection based on application
Housing protection index	IP40 - IP66	Protection against dust and water splashes
Number of poles	2P, 4P	Variety according to circuit requirements

Its applications are numerous, spanning everything from rooftop solar panel installations to energy storage centers. DC MCCBs also contribute to the security of electric vehicle charging stations and critical infrastructure in industry and telecommunications. Their ability to protect systems subject to heavy loads and rapid power fluctuations makes them key components for ensuring long-term electrical reliability.

DC MCCB 500V Molded Case Circuit Breaker: Safety and Performance for Photovoltaic and Industrial Circuits ⚡☀

The DC molded case MCCB circuit breaker is specifically designed to provide optimal protection in direct current environments, where high voltage and high current handling are crucial. Its robust design and high-quality materials ensure a high level of safety, particularly in photovoltaic installations, where the risk of overload and short circuit is significant. This device is also essential in industrial environments requiring exemplary reliability and easy maintenance.

The main advantages of the 500V MCCB include:

• Complete protection against overloads and short circuits , ensuring rapid shutdown and limiting the risk of fire.

• Compact design for easy integration of various systems, even in tight spaces.

• Housings made of flame-retardant and UV-resistant materials guaranteeing durability against external stresses and bad weather.

• Simplified installation on 35 mm DIN rail , facilitating maintenance and equipment updates.

• Ability to adapt to different voltage and current parameters depending on the models.

The MCCB range is distinguished by its advanced manufacturing quality and rigorous control at every stage. This reliability allows it to meet the requirements of international standards while ensuring optimal operation in harsh working conditions. Manufacturers adopt assembly processes with more than 8,000 electrical cycles and 2,000 mechanical cycles to ensure longevity and consistent performance.

Technical Features and Benefits of DC MCCB 500V Molded Case Circuit Breaker for Photovoltaic, Industrial and Energy Storage Systems

Current breaking capacity (Icu) and service capacity (Ics) are key indicators for judging the reliability of an MCCB. A high breaking capacity ensures that the circuit breaker can interrupt severe faults without damaging the equipment or compromising safety. In addition, limiting the breaking capacity directly affects the service life of the installation by reducing the stress on the components.

The table below summarizes the essential data of the different 500V MCCB models:

Model	Nominal current (A)	Breaking capacity Icu (kA)	Service capacity Ics (kA)	Number of poles
MCCB 2P 125A	125	10	7.5	2
MCCB 4P 250A	250	25	20	4
MCCB 2P 250A	250	15	12	2

The circuit breakers also feature silver alloy contacts, essential for ensuring optimal conductivity and high resistance to wear caused by frequent electrical arcs during power outages. Their molded case guarantees perfect insulation while providing mechanical protection suitable for harsh industrial environments.

• Suitable applications:

  • Residential and industrial photovoltaic systems

  • Electric energy storage centers

  • Electric vehicle charging stations

  • Telecommunications infrastructure

  • Heavy industrial environments

• Key Benefits:

  • Reduction of risks associated with short circuits

  • Easy maintenance thanks to a modular design

  • High resistance to current and temperature variations

  • Quick and secure installation on DIN rail

DC MCCB Working Principle: Thermal and Magnetic Protection, International Standards (IEC60947-2, GB 14048.2) and Design Advances

The MCCB's protection mechanism combines two complementary systems: thermal protection and magnetic protection. Thermal protection, based on a bimetallic blade, detects overload by expansion due to heating, causing the circuit breaker to open once the threshold temperature is exceeded. The magnetic system intervenes instantly in the event of a short circuit, thanks to a coil creating a magnetic field strong enough to trigger instantaneous opening.

Type of protection	Function	Key feature
Thermal	Overload detection	Bimetallic action by thermal expansion
Magnetic	Short circuit detection	Instant triggering by magnetic coil

Compliance with IEC60947-2, GB 14048.2, as well as IEC60947-5.1 and GB 14048.5, ensures seamless compliance, enhancing safety and reliability. These certifications encompass strict criteria for breaking capacity, stability of settings after electrical cycles, and mechanical strength.

Recent advances in design have made it possible to integrate:

• Reinforced polycarbonate housings, offering better resistance to UV and chemical attacks.

• A rapid closing and segmentation system, reducing maintenance times and ensuring safe intervention.

• Increased precision in setting thermal and magnetic protection, minimizing false trips while maximizing responsiveness during a real fault.

These elements contribute to enhanced protection against electric arcs, a major fire hazard in industrial and photovoltaic installations. In addition, the integrated isolation function ensures operator safety and equipment preservation, avoiding any electrical disturbance during maintenance work.

FAQ

• What is the main advantage of DC MCCB over conventional AC circuit breakers?
  The DC MCCB is specifically designed to handle high DC voltages and large currents, providing effective protection against overloads and short circuits, which is essential in photovoltaic and industrial DC systems.

• How to ensure that settings are maintained after several operating cycles?
  MCCBs are tested over 8000 electrical cycles and 2000 mechanical cycles to ensure stability and accuracy of settings, thus providing reliable protection over time.

• Can a 2P 500V 125A MCCB be used on electric vehicle charging stations?
  Yes, this type of circuit breaker is suitable for EV charging infrastructure, effectively protecting against electrical faults and ensuring user safety as well as equipment durability.

• What standards ensure the quality and reliability of DC MCCBs?
  MCCBs comply with international standards IEC60947-2, GB 14048.2, IEC60947-5.1, and GB 14048.5, which certify their breaking capacity, mechanical resistance and component quality.

• Are there any support services for choosing and installing circuit breakers?
  Yes, manufacturers often offer free samples, quick online quotes, and personalized technical advice to tailor the MCCB selection to specific customer needs.