LM47-63 MCB | 1P-4P 63A C-Curve Miniature Circuit Breaker
LM47-63 MCB | 1P-4P 63A C-Curve Miniature Circuit Breaker
Miniature Circuit Breaker (MCB) is the core component for Circuit protection and on-off control in low-voltage distribution systems, which is widely used in homes, commercial buildings and small industrial scenarios.
- Model name: LM47-63
- Rated current:1,2,3,4,5,6,8,10,13,16,20,25,32,40,50,63A
- Rated voltage :230/400V
- Poles:1P,2P,3P,4P
- Rated Breaking capacity:4500A
- Standard:IEC/EN 60898-1
Miniature Circuit Breaker (MCB) is the core component for Circuit protection and on-off control in low-voltage distribution systems, which is widely used in homes, commercial buildings and small industrial scenarios.
- Model name: LM47-63
- Rated current:1,2,3,4,5,6,8,10,13,16,20,25,32,40,50,63A
- Rated voltage :230/400V
- Poles:1P,2P,3P,4P
- Rated Breaking capacity:4500A
- Standard:IEC/EN 60898-1
1. Product Overview
The LM47-63 Series Miniature Circuit Breaker (MCB) is a high-performance, DIN-rail mounted protection device engineered to deliver reliable overload and short-circuit protection for low-voltage AC distribution systems. Designed for both residential and industrial applications, this series offers flexible pole configurations (1P/2P/3P/4P) and industry-standard safety certifications, making it a versatile solution for safeguarding electrical circuits in homes, commercial buildings, and industrial facilities.
2. Core Product Features
1. Flexible Pole Configurations for Every Application
- 1P: Ideal for single-phase lighting and small power circuits
- 2P: Suitable for single-phase main circuits and equipment requiring neutral protection
- 3P: Perfect for three-phase industrial machinery and motor control circuits
- 4P: Designed for three-phase systems with neutral, ensuring comprehensive protection for commercial and industrial distribution panels
2. Robust Electrical Performance
- Rated Current: C63 (63A), supporting high-power loads up to 13.8kW (230V) or 43.7kW (400V three-phase)
- Breaking Capacity: 4500A interrupting capacity, quickly isolating short-circuit faults to prevent equipment damage and fire hazards
- C-Curve Trip Characteristic: Optimized for general-purpose circuits, with a trip response between 5–10 times rated current to accommodate moderate inrush currents from motors, lighting, and appliances without nuisance tripping
- Voltage Compatibility: Rated for 230V (1P) / 400V (2P/3P/4P) AC systems at 50Hz, suitable for global low-voltage power grids
3. Premium Safety & Compliance
- Certified to International Standards: Fully compliant with IEC60898-1 (international) and GB/T10963.1 (Chinese national) standards, with 3C certification for quality assurance
- Advanced Arc Extinguishing System: High-efficiency arc-quenching mechanism safely contains and extinguishes arcs during fault conditions, extending the breaker’s service life and preventing electrical fires
- Clear Status Indication: Ergonomic green toggle with visible “ON/OFF” markings for quick circuit status identification, even in low-light environments
- Shock-Resistant Construction: High-grade flame-retardant thermoplastic housing provides excellent insulation and resistance to impact, heat, and aging
4. User-Friendly Installation & Maintenance
- Standard DIN Rail Mounting: Compatible with 35mm DIN rails, enabling quick, tool-less installation in distribution panels
- Universal Wiring Compatibility: Top/bottom terminal design supports flexible wiring configurations for both incoming and outgoing circuits
- Modular Design: Compact form factor saves valuable panel space, with uniform dimensions across all pole counts for easy system expansion
- Easy Operation: Smooth, ergonomic toggle allows effortless manual tripping and resetting for maintenance and emergency use
3. Key Advantages Over Competitors
| Feature | LVMA LM47-63 MCB | Generic Budget MCBs | Mid-Range Competitor MCBs |
|---|---|---|---|
| Breaking Capacity | 4500A (IEC/GB certified) | Often uncertified, <2000A | 3000A (some non-certified) |
| Trip Consistency | Stable C-curve response, minimal nuisance tripping | Inconsistent trip characteristics, frequent false trips | Moderate consistency, occasional tripping issues |
| Housing Material | Flame-retardant, high-temperature resistant thermoplastic | Low-grade plastic, prone to melting under heat | Standard flame-retardant plastic |
| Certification | 3C, IEC60898-1, GB/T10963.1 | No third-party certification | Partial certification (IEC only) |
| Installation Flexibility | Universal top/bottom terminals, full pole range | Limited pole options, fixed terminal orientation | Standard terminals, limited pole configurations |
| Durability | 10,000+ mechanical operations, 4,000+ electrical operations | <5,000 operations, short service life | 8,000+ mechanical operations, 3,000+ electrical operations |
4. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LM47-63 |
| Rated Current | 63A (C63) |
| Poles | 1P / 2P / 3P / 4P |
| Rated Voltage | 230V AC (1P) / 400V AC (2P/3P/4P) |
| Frequency | 50Hz |
| Breaking Capacity | 4500A |
| Trip Curve | B/C/D-Curve |
| Compliance Standards | IEC60898-1, GB/T10963.1, 3C Certified |
| Mounting Type | 35mm DIN Rail |
| Operating Temperature | -25°C to +40°C |
| Mechanical Endurance | ≥10,000 operations |
| Electrical Endurance | ≥4,000 operations |
| Housing Material | Flame-retardant thermoplastic |
| Terminal Type | Screw-type, copper conductor compatible |
5. Typical Applications
- Residential distribution boards (whole-house protection, high-power appliance circuits)
- Commercial building lighting and power distribution panels
- Industrial machinery control circuits and motor protection
- HVAC systems, elevators, and office equipment circuits
- Small commercial and retail power distribution systems
- Solar and renewable energy low-voltage distribution systems
6. Safety & Reliability Assurance
The LVMA LM47-63 Series undergoes rigorous factory testing, including short-circuit, overload, temperature rise, and dielectric strength tests, to ensure consistent performance under harsh conditions. Every unit is inspected for quality compliance, providing peace of mind for installers and end-users alike.
7.Tripping Characteristic (IEC60898-1)
8.Overall and Installation Dimension(mm)
9. FAQ
Q1: What is the difference between MCB miniature circuit breaker and ordinary air switch?
MCB miniature circuit breakers adopt more precise dual trip technology and high-quality silver alloy contacts, with faster response speed, higher breaking accuracy and longer service life. They feature miniaturized installation and stronger stability, which is far superior to ordinary air switches in safety and durability, and is more suitable for standardized high-end power distribution systems.
Q2: How to choose the right MCB current specification?
It is recommended to match according to the maximum load current of the circuit. Household lighting circuits can choose 6A-16A, socket and household appliance circuits 20A-32A, and high-power industrial and commercial equipment 40A-63A. We provide professional parameter matching suggestions according to user scenarios.
Q3: What are the B/C/D trip curves used for?
B curve is suitable for pure resistance loads such as household lighting; C curve is suitable for conventional household and commercial mixed loads; D curve is suitable for industrial equipment with large instantaneous starting current such as motors and compressors.
Q4: Do you support bulk wholesale and customized services?
Yes. We support global bulk wholesale, project batch ordering and OEM/ODM customization. We can provide exclusive pricing, customized packaging and brand printing services according to customer order quantity and demand.
10. Technical documentation and support
Download the full datasheet for detailed specifications, wiring diagrams and trip coordination guides.
Please contact our technical team for custom configuration or OEM/ODM solutions for your project.
Request a quote with details about your project for volume pricing, lead times, and compliance certifications.
1. Product Overview
The LM47-63 Series Miniature Circuit Breaker (MCB) is a high-performance, DIN-rail mounted protection device engineered to deliver reliable overload and short-circuit protection for low-voltage AC distribution systems. Designed for both residential and industrial applications, this series offers flexible pole configurations (1P/2P/3P/4P) and industry-standard safety certifications, making it a versatile solution for safeguarding electrical circuits in homes, commercial buildings, and industrial facilities.
2. Core Product Features
1. Flexible Pole Configurations for Every Application
- 1P: Ideal for single-phase lighting and small power circuits
- 2P: Suitable for single-phase main circuits and equipment requiring neutral protection
- 3P: Perfect for three-phase industrial machinery and motor control circuits
- 4P: Designed for three-phase systems with neutral, ensuring comprehensive protection for commercial and industrial distribution panels
2. Robust Electrical Performance
- Rated Current: C63 (63A), supporting high-power loads up to 13.8kW (230V) or 43.7kW (400V three-phase)
- Breaking Capacity: 4500A interrupting capacity, quickly isolating short-circuit faults to prevent equipment damage and fire hazards
- C-Curve Trip Characteristic: Optimized for general-purpose circuits, with a trip response between 5–10 times rated current to accommodate moderate inrush currents from motors, lighting, and appliances without nuisance tripping
- Voltage Compatibility: Rated for 230V (1P) / 400V (2P/3P/4P) AC systems at 50Hz, suitable for global low-voltage power grids
3. Premium Safety & Compliance
- Certified to International Standards: Fully compliant with IEC60898-1 (international) and GB/T10963.1 (Chinese national) standards, with 3C certification for quality assurance
- Advanced Arc Extinguishing System: High-efficiency arc-quenching mechanism safely contains and extinguishes arcs during fault conditions, extending the breaker’s service life and preventing electrical fires
- Clear Status Indication: Ergonomic green toggle with visible “ON/OFF” markings for quick circuit status identification, even in low-light environments
- Shock-Resistant Construction: High-grade flame-retardant thermoplastic housing provides excellent insulation and resistance to impact, heat, and aging
4. User-Friendly Installation & Maintenance
- Standard DIN Rail Mounting: Compatible with 35mm DIN rails, enabling quick, tool-less installation in distribution panels
- Universal Wiring Compatibility: Top/bottom terminal design supports flexible wiring configurations for both incoming and outgoing circuits
- Modular Design: Compact form factor saves valuable panel space, with uniform dimensions across all pole counts for easy system expansion
- Easy Operation: Smooth, ergonomic toggle allows effortless manual tripping and resetting for maintenance and emergency use
3. Key Advantages Over Competitors
| Feature | LVMA LM47-63 MCB | Generic Budget MCBs | Mid-Range Competitor MCBs |
|---|---|---|---|
| Breaking Capacity | 4500A (IEC/GB certified) | Often uncertified, <2000A | 3000A (some non-certified) |
| Trip Consistency | Stable C-curve response, minimal nuisance tripping | Inconsistent trip characteristics, frequent false trips | Moderate consistency, occasional tripping issues |
| Housing Material | Flame-retardant, high-temperature resistant thermoplastic | Low-grade plastic, prone to melting under heat | Standard flame-retardant plastic |
| Certification | 3C, IEC60898-1, GB/T10963.1 | No third-party certification | Partial certification (IEC only) |
| Installation Flexibility | Universal top/bottom terminals, full pole range | Limited pole options, fixed terminal orientation | Standard terminals, limited pole configurations |
| Durability | 10,000+ mechanical operations, 4,000+ electrical operations | <5,000 operations, short service life | 8,000+ mechanical operations, 3,000+ electrical operations |
4. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | LM47-63 |
| Rated Current | 63A (C63) |
| Poles | 1P / 2P / 3P / 4P |
| Rated Voltage | 230V AC (1P) / 400V AC (2P/3P/4P) |
| Frequency | 50Hz |
| Breaking Capacity | 4500A |
| Trip Curve | B/C/D-Curve |
| Compliance Standards | IEC60898-1, GB/T10963.1, 3C Certified |
| Mounting Type | 35mm DIN Rail |
| Operating Temperature | -25°C to +40°C |
| Mechanical Endurance | ≥10,000 operations |
| Electrical Endurance | ≥4,000 operations |
| Housing Material | Flame-retardant thermoplastic |
| Terminal Type | Screw-type, copper conductor compatible |
5. Typical Applications
- Residential distribution boards (whole-house protection, high-power appliance circuits)
- Commercial building lighting and power distribution panels
- Industrial machinery control circuits and motor protection
- HVAC systems, elevators, and office equipment circuits
- Small commercial and retail power distribution systems
- Solar and renewable energy low-voltage distribution systems
6. Safety & Reliability Assurance
The LVMA LM47-63 Series undergoes rigorous factory testing, including short-circuit, overload, temperature rise, and dielectric strength tests, to ensure consistent performance under harsh conditions. Every unit is inspected for quality compliance, providing peace of mind for installers and end-users alike.
7.Tripping Characteristic (IEC60898-1)
8.Overall and Installation Dimension(mm)
9. FAQ
Q1: What is the difference between MCB miniature circuit breaker and ordinary air switch?
MCB miniature circuit breakers adopt more precise dual trip technology and high-quality silver alloy contacts, with faster response speed, higher breaking accuracy and longer service life. They feature miniaturized installation and stronger stability, which is far superior to ordinary air switches in safety and durability, and is more suitable for standardized high-end power distribution systems.
Q2: How to choose the right MCB current specification?
It is recommended to match according to the maximum load current of the circuit. Household lighting circuits can choose 6A-16A, socket and household appliance circuits 20A-32A, and high-power industrial and commercial equipment 40A-63A. We provide professional parameter matching suggestions according to user scenarios.
Q3: What are the B/C/D trip curves used for?
B curve is suitable for pure resistance loads such as household lighting; C curve is suitable for conventional household and commercial mixed loads; D curve is suitable for industrial equipment with large instantaneous starting current such as motors and compressors.
Q4: Do you support bulk wholesale and customized services?
Yes. We support global bulk wholesale, project batch ordering and OEM/ODM customization. We can provide exclusive pricing, customized packaging and brand printing services according to customer order quantity and demand.
10. Technical documentation and support
Download the full datasheet for detailed specifications, wiring diagrams and trip coordination guides.
Please contact our technical team for custom configuration or OEM/ODM solutions for your project.
Request a quote with details about your project for volume pricing, lead times, and compliance certifications.
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