LMM1DC DC MCCB | 125-630A 500V DC Circuit Breaker
LMM1DC DC MCCB | 125-630A 500V DC Circuit Breaker
The LMM1DC series DC molded case circuit breaker delivers reliable overload and short-circuit protection for DC power networks, with a rated current range of 125A to 630A and a rated operational voltage of DC 500V. Featuring a 25kA ultimate breaking capacity, IEC 60947-2 compliance and CE certification, it is a robust solution for solar PV installations, battery energy storage systems and industrial DC distribution panels.
📚 LMM1DC Series DC Molded Case Circuit Breaker (DC MCCB) Manual
The LMM1DC series DC molded case circuit breaker delivers reliable overload and short-circuit protection for DC power networks, with a rated current range of 125A to 630A and a rated operational voltage of DC 500V. Featuring a 25kA ultimate breaking capacity, IEC 60947-2 compliance and CE certification, it is a robust solution for solar PV installations, battery energy storage systems and industrial DC distribution panels.
📚 LMM1DC Series DC Molded Case Circuit Breaker (DC MCCB) Manual
Product Overview
The LVMA LMM1DC series is a professional-grade DC molded case circuit breaker designed for low-voltage DC power distribution systems. Covering a rated current range from 125A to 630A and rated for DC 500V operation, this DC MCCB provides comprehensive protection against overload, short circuit and undervoltage hazards in DC circuits.
Engineered in strict accordance with IEC 60947-2 standards and CE certified, the LMM1DC series offers a 25kA ultimate short-circuit breaking capacity, ensuring reliable fault interruption even in high-power DC systems. Its compact molded case structure, clear ON/OFF indication and trip test button make it suitable for both fixed installation and routine maintenance in commercial and industrial DC projects.
Key Features
- Wide Current Coverage: Available in 125A, 250A, 400A and 630A frame sizes to match diverse DC load requirements
- High DC Breaking Performance: 25kA ultimate breaking capacity (Icu) and 18kA service breaking capacity (Ics) at DC 500V
- Dual Protection Mechanism: Integrated thermal-magnetic trip for overload and short-circuit protection, Category A design
- Clear Operation Indication: Color-coded ON/OFF handle with visible status, plus red trip indicator and push-to-test button
- Robust Insulated Housing: High-strength flame-retardant molded case with 800V impulse withstand voltage (Ui)
- Standardized Mounting: Universal panel / DIN rail compatible installation with clearly marked LINE (inlet) and LOAD (outlet) terminals
- Global Compliance: Fully compliant with IEC 60947-2 standard and CE certified for international market access
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Series | LMM1DC |
| Number of Poles | 1 Pole, 2 Pole, 3 Pole, 4 Pole |
| Rated Operational Voltage (Ue) | DC 500V / DC 750V / DC 1000V |
| Impulse Withstand Voltage (Ui) | 800V |
| Rated Current Range (In) | 125A – 630A |
| Ultimate Breaking Capacity (Icu) | 25kA @ DC 500V |
| Service Breaking Capacity (Ics) | 18kA @ DC 500V |
| Trip Type | Thermal-magnetic (Category A) |
| Reference Ambient Temperature | +40°C |
| Applicable Standard | IEC 60947-2 |
| Certification | CE |
| Installation | Fixed panel mounting |
Application Scenarios
- Solar photovoltaic (PV) array combiner boxes and PV distribution systems
- Battery energy storage systems (BESS) and DC side power distribution
- Industrial DC control panels and DC power supply systems
- Telecom base station DC power infrastructure
- Electric vehicle (EV) charging station DC protection
- Data center DC backup power systems
Certifications & Compliance
All LMM1DC series DC MCCBs are manufactured and tested under ISO 9001 quality management systems. The product fully meets the requirements of IEC 60947-2 (Low-voltage switchgear and controlgear – Part 2: Circuit-breakers) and carries the CE mark, making it suitable for import and installation across Europe, Southeast Asia, the Middle East, Africa and other global markets.
Installation & Operation Notes
- Connect the upper terminals (marked LINE) to the DC power supply side, and the lower terminals (marked LOAD) to the load side.
- Ensure all terminal screws are tightened to the specified torque to avoid overheating.
- Press the red PUSH TO TRIP button periodically to verify the tripping mechanism functions correctly.
- Do not operate the breaker beyond its rated voltage and current values.
- Install the product in a dry, well-ventilated environment free from corrosive gas and explosive dust.
Why Choose LVMA DC MCCBs
LVMA is a professional manufacturer of low-voltage electrical components with extensive experience in DC protection solutions for new energy industries. Our DC molded case circuit breakers undergo strict full-load testing before delivery to ensure stable performance in long-term DC operation. We support OEM/ODM customization, bulk export packaging and flexible delivery schedules to meet the needs of global distributors, EPC contractors and system integrators.
Product Overview
The LVMA LMM1DC series is a professional-grade DC molded case circuit breaker designed for low-voltage DC power distribution systems. Covering a rated current range from 125A to 630A and rated for DC 500V operation, this DC MCCB provides comprehensive protection against overload, short circuit and undervoltage hazards in DC circuits.
Engineered in strict accordance with IEC 60947-2 standards and CE certified, the LMM1DC series offers a 25kA ultimate short-circuit breaking capacity, ensuring reliable fault interruption even in high-power DC systems. Its compact molded case structure, clear ON/OFF indication and trip test button make it suitable for both fixed installation and routine maintenance in commercial and industrial DC projects.
Key Features
- Wide Current Coverage: Available in 125A, 250A, 400A and 630A frame sizes to match diverse DC load requirements
- High DC Breaking Performance: 25kA ultimate breaking capacity (Icu) and 18kA service breaking capacity (Ics) at DC 500V
- Dual Protection Mechanism: Integrated thermal-magnetic trip for overload and short-circuit protection, Category A design
- Clear Operation Indication: Color-coded ON/OFF handle with visible status, plus red trip indicator and push-to-test button
- Robust Insulated Housing: High-strength flame-retardant molded case with 800V impulse withstand voltage (Ui)
- Standardized Mounting: Universal panel / DIN rail compatible installation with clearly marked LINE (inlet) and LOAD (outlet) terminals
- Global Compliance: Fully compliant with IEC 60947-2 standard and CE certified for international market access
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Series | LMM1DC |
| Number of Poles | 1 Pole, 2 Pole, 3 Pole, 4 Pole |
| Rated Operational Voltage (Ue) | DC 500V / DC 750V / DC 1000V |
| Impulse Withstand Voltage (Ui) | 800V |
| Rated Current Range (In) | 125A – 630A |
| Ultimate Breaking Capacity (Icu) | 25kA @ DC 500V |
| Service Breaking Capacity (Ics) | 18kA @ DC 500V |
| Trip Type | Thermal-magnetic (Category A) |
| Reference Ambient Temperature | +40°C |
| Applicable Standard | IEC 60947-2 |
| Certification | CE |
| Installation | Fixed panel mounting |
Application Scenarios
- Solar photovoltaic (PV) array combiner boxes and PV distribution systems
- Battery energy storage systems (BESS) and DC side power distribution
- Industrial DC control panels and DC power supply systems
- Telecom base station DC power infrastructure
- Electric vehicle (EV) charging station DC protection
- Data center DC backup power systems
Certifications & Compliance
All LMM1DC series DC MCCBs are manufactured and tested under ISO 9001 quality management systems. The product fully meets the requirements of IEC 60947-2 (Low-voltage switchgear and controlgear – Part 2: Circuit-breakers) and carries the CE mark, making it suitable for import and installation across Europe, Southeast Asia, the Middle East, Africa and other global markets.
Installation & Operation Notes
- Connect the upper terminals (marked LINE) to the DC power supply side, and the lower terminals (marked LOAD) to the load side.
- Ensure all terminal screws are tightened to the specified torque to avoid overheating.
- Press the red PUSH TO TRIP button periodically to verify the tripping mechanism functions correctly.
- Do not operate the breaker beyond its rated voltage and current values.
- Install the product in a dry, well-ventilated environment free from corrosive gas and explosive dust.
Why Choose LVMA DC MCCBs
LVMA is a professional manufacturer of low-voltage electrical components with extensive experience in DC protection solutions for new energy industries. Our DC molded case circuit breakers undergo strict full-load testing before delivery to ensure stable performance in long-term DC operation. We support OEM/ODM customization, bulk export packaging and flexible delivery schedules to meet the needs of global distributors, EPC contractors and system integrators.
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