LMM3 3P/4P 125-630A MCCB 400V AC
LMM3 3P/4P 125-630A MCCB 400V AC
LMM3 MCCB has a rated insulation voltage of 800V and is suitable for circuits with AC 50Hz/60Hz, rated operating voltage 690V and below, and rated current up to 630A. It has overload, short circuit and undervoltage protection functions. It is divided into four categories: C type, L type, M type and H type according to the rated limit short circuit breaking capacity.
LMM3 MCCB has a rated insulation voltage of 800V and is suitable for circuits with AC 50Hz/60Hz, rated operating voltage 690V and below, and rated current up to 630A. It has overload, short circuit and undervoltage protection functions. It is divided into four categories: C type, L type, M type and H type according to the rated limit short circuit breaking capacity.
1. Product Overview
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM3 |
| Poles | 3P (3-phase) / 4P (4-phase) |
| Rated Operational Voltage (Ue) | AC 400V / 50/60Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Impulse Withstand Voltage (Uimp) | 8kV |
| Rated Current (In) | 125-630A |
| Ultimate Breaking Capacity (Icu) | 50kA (at 400V) |
| Service Breaking Capacity (Ics) | 35kA (at 400V) |
| Protection Functions | Overload (thermal), Short-circuit (magnetic) |
| Trip Unit Type | Fixed thermal-magnetic |
| Mounting Type | Panel mount |
| Enclosure Rating | IP20 (front face) |
| Compliance Standards | IEC 60947-2, GB/T 14048.2 |
| Operating Temperature | -10°C ~ +60°C |
| Mechanical Life | ≥8,000 operations |
| Electrical Life | ≥1,500 operations at rated load |
3. Core Features
✅ High-Current Capacity: Rated at 630A, suitable for main distribution circuits in large industrial facilities and commercial buildings.
✅ Robust Breaking Performance: 50kA ultimate short-circuit breaking capacity ensures reliable protection against severe fault conditions.
✅ Thermal-Magnetic Trip: Fixed thermal-magnetic trip mechanism provides consistent overload and short-circuit protection.
✅ Heavy-Duty Construction: Flame-retardant, impact-resistant molded case (UL94 V-0) ensures durability in harsh environments.
✅ Large Terminal Connections: Oversized terminals accommodate high-current cables, ensuring secure, low-resistance connections.
✅ Clear ON/OFF Indication: Color-coded blue operating handle with visible status marking for safe operation and maintenance.
✅ Test Function: Built-in test button verifies trip functionality for periodic safety checks.
✅ Compliant Design: Meets IEC 60947-2 standards, ensuring safety and performance for global industrial applications.
4. Applications
- Main distribution panels for industrial facilities and commercial buildings
- Generator and backup power system main breakers
- Three-phase motor control centers and heavy machinery
- Mining, manufacturing, and heavy-duty industrial power systems
- Solar and wind power plant AC-side distribution
- Data center and large-scale commercial power distribution
5. Why Choose LVMA LMM3 MCCB?
- Reliable High-Current Protection: 630A rating and 50kA breaking capacity make it ideal for the most demanding industrial distribution applications.
- Robust Durability: Heavy-duty molded case and high-quality components ensure long-term performance in harsh environments.
- Compliant & Safe: Meets IEC 60947-2 standards, providing peace of mind for safety and regulatory compliance.
- Easy Installation: Standard panel mount design with large terminals simplifies wiring and integration into distribution panels.
- Cost-Effective Performance: Reliable thermal-magnetic trip mechanism at a competitive price point, reducing long-term maintenance costs.
6. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
1. Product Overview
2. Key Specifications
| Parameter | Details |
|---|---|
| Model | LMM3 |
| Poles | 3P (3-phase) / 4P (4-phase) |
| Rated Operational Voltage (Ue) | AC 400V / 50/60Hz |
| Rated Insulation Voltage (Ui) | AC 690V |
| Rated Impulse Withstand Voltage (Uimp) | 8kV |
| Rated Current (In) | 125-630A |
| Ultimate Breaking Capacity (Icu) | 50kA (at 400V) |
| Service Breaking Capacity (Ics) | 35kA (at 400V) |
| Protection Functions | Overload (thermal), Short-circuit (magnetic) |
| Trip Unit Type | Fixed thermal-magnetic |
| Mounting Type | Panel mount |
| Enclosure Rating | IP20 (front face) |
| Compliance Standards | IEC 60947-2, GB/T 14048.2 |
| Operating Temperature | -10°C ~ +60°C |
| Mechanical Life | ≥8,000 operations |
| Electrical Life | ≥1,500 operations at rated load |
3. Core Features
✅ High-Current Capacity: Rated at 630A, suitable for main distribution circuits in large industrial facilities and commercial buildings.
✅ Robust Breaking Performance: 50kA ultimate short-circuit breaking capacity ensures reliable protection against severe fault conditions.
✅ Thermal-Magnetic Trip: Fixed thermal-magnetic trip mechanism provides consistent overload and short-circuit protection.
✅ Heavy-Duty Construction: Flame-retardant, impact-resistant molded case (UL94 V-0) ensures durability in harsh environments.
✅ Large Terminal Connections: Oversized terminals accommodate high-current cables, ensuring secure, low-resistance connections.
✅ Clear ON/OFF Indication: Color-coded blue operating handle with visible status marking for safe operation and maintenance.
✅ Test Function: Built-in test button verifies trip functionality for periodic safety checks.
✅ Compliant Design: Meets IEC 60947-2 standards, ensuring safety and performance for global industrial applications.
4. Applications
- Main distribution panels for industrial facilities and commercial buildings
- Generator and backup power system main breakers
- Three-phase motor control centers and heavy machinery
- Mining, manufacturing, and heavy-duty industrial power systems
- Solar and wind power plant AC-side distribution
- Data center and large-scale commercial power distribution
5. Why Choose LVMA LMM3 MCCB?
- Reliable High-Current Protection: 630A rating and 50kA breaking capacity make it ideal for the most demanding industrial distribution applications.
- Robust Durability: Heavy-duty molded case and high-quality components ensure long-term performance in harsh environments.
- Compliant & Safe: Meets IEC 60947-2 standards, providing peace of mind for safety and regulatory compliance.
- Easy Installation: Standard panel mount design with large terminals simplifies wiring and integration into distribution panels.
- Cost-Effective Performance: Reliable thermal-magnetic trip mechanism at a competitive price point, reducing long-term maintenance costs.
6. Technical Documents & Support
- Download the full datasheet for detailed specifications, wiring diagrams, and installation instructions.
- Contact our engineering team for custom pole configurations or OEM/ODM solutions for large-scale projects.
- Request a quote with your project details for bulk pricing, lead times, and compliance certifications.
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