LM47-63 1P 2P 3P 4P 63A MCB
LM47-63 1P 2P 3P 4P 63A MCB
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
Miniature Circuit Breaker (MCB), also known as micro circuit breaker, is a core low-voltage terminal power distribution protection device widely used in global residential, commercial and industrial electrical systems. Designed for AC 50/60Hz power circuits with rated voltage 230V/400V and rated current up to 63A, this compact circuit breaker provides reliable overload and short circuit protection, and supports infrequent manual switching of electrical circuits under normal operating conditions.
Our high-performance miniature circuit breakers adopt dual thermal and electromagnetic trip mechanisms, featuring fast response, high breaking capacity, long service life and stable operation. Strictly manufactured in compliance with international electrical standards, the MCB effectively prevents circuit burnout, equipment damage and electrical safety accidents caused by abnormal current, becoming an essential safety component for low-voltage power distribution systems worldwide.
2. Core Product Features
Our premium miniature circuit breakers stand out from ordinary air switches with multiple optimized designs, meeting the rigorous power safety requirements of global end-users and engineering projects:
-
Dual Protection Mechanism (Thermal + Electromagnetic Trip): Equipped with bimetallic strip thermal trip for overload protection and electromagnetic instantaneous trip for short circuit protection. It accurately identifies abnormal current states, cuts off the circuit within 0.1 seconds in case of short circuit, and delays power-off for mild overloads to avoid unnecessary power interruption, balancing safety and power supply stability.
-
High Breaking Capacity: Adopts optimized magnetic blow-out arc extinguishing technology and high-rigidity plastic shell structure. It can instantly break high fault current without arc splash or component ablation, effectively suppress fault diffusion, and adapt to complex grid environment with unstable current fluctuation.
-
Premium Material Configuration: The contact system is made of high-purity silver alloy material, which avoids welding failure caused by high-temperature current, ensures stable electrical conductivity, and greatly reduces contact resistance and heat generation. The flame-retardant engineering plastic shell is anti-aging, high-temperature resistant and insulation-safe, adapting to various harsh installation environments.
-
Long Service Life & Stable Performance: Supports tens of thousands of non-frequent closing and opening operations, with mechanical and electrical performance far exceeding industry standard values. It effectively reduces equipment replacement frequency and lowers long-term operation and maintenance costs for users.
-
Compact & Easy Installation: Modular miniaturized design saves installation space in distribution boxes. Equipped with combined wiring terminals, it supports quick connection of busbars and various wire specifications, realizing fast and standardized installation without complex tools.
-
Multiple Specifications & Wide Compatibility: Complete product series including 1P, 2P, 3P, 4P pole types, with current specifications covering 1A-63A. It perfectly matches residential lighting circuits, socket circuits, commercial power distribution and small industrial equipment power supply scenarios.
3. Technical Parameters
All miniature circuit breakers are tested and verified in strict accordance with IEC international standards, with standardized and transparent parameters to support global project bidding and engineering matching:
|
Parameter Item
|
Technical Specification
|
|---|---|
|
Product Name
|
LM47-63
|
|
Rated Frequency
|
50Hz / 60Hz
|
|
Rated Voltage
|
230V AC (1P); 400V AC (2P/3P/4P)
|
|
Rated Current Range
|
1A, 2A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
|
|
Breaking Capacity
|
4.5KA
|
|
Trip Characteristic
|
B / C / D Curve
|
|
Pole Number
|
1P, 2P, 3P, 4P
|
|
Shell Material
|
Flame-retardant ABS Engineering Plastic
|
|
Contact Material
|
Silver Alloy
|
|
Mechanical Life
|
≥10000 Times
|
|
Operating Temperature
|
-25℃ ~ +70℃
|
|
Execution Standard
|
IEC 60898-1, GB 10963.1
|
sion_table]
4. Working Principle
The miniature circuit breaker realizes full-range circuit protection through two core trip mechanisms, solving two major electrical faults of overload and short circuit:
Overload Protection (Thermal Trip): When the circuit current is slightly overloaded for a long time without short circuit fault, the internal bimetallic strip generates continuous heat due to overcurrent, and bends with temperature rise. When the deformation reaches the preset threshold, it pushes the tripping mechanism to disconnect the circuit, avoiding wire aging and insulation damage caused by long-term overload.
Short Circuit Protection (Electromagnetic Trip): In case of sudden short circuit fault and instantaneous surge current in the circuit, the electromagnetic coil generates strong magnetic force in an instant, driving the tripping mechanism to act quickly and cut off the power supply in milliseconds, preventing short circuit spark and high temperature from causing fire and equipment burnout accidents.
5. Wide Application Scenarios
Thanks to its compact structure, stable performance and high safety factor, our MCB circuit breakers are widely applicable to global low-voltage power distribution scenarios, covering civil, commercial and industrial fields:
-
Residential Buildings: Household lighting circuits, socket power supply, air conditioning and high-power electrical equipment circuits, providing basic household electricity safety protection.
-
Commercial Spaces: Office buildings, shopping malls, hotels, supermarkets and other commercial power distribution boxes, supporting long-term stable operation of commercial electrical equipment.
-
Industrial Scenarios: Small industrial equipment, workshop terminal power distribution, automation equipment circuits, adapting to frequent current fluctuation of industrial loads.
-
Public Facilities: Schools, hospitals, subway stations, street lighting and other public power supply systems, ensuring continuous and safe power supply for public facilities.
-
New Energy & Smart Systems: Smart home distribution systems, photovoltaic power generation terminal circuits, charging pile front-end protection circuits.
6. Product Advantages & Buyer Benefits
-
High Safety & Low Failure Rate: Strict factory testing and standardized production eliminate hidden dangers of electric leakage, failure to trip and spontaneous burnout. The high flame-retardant and insulation design ensures zero safety hazards in normal use.
-
Cost-Effective & Durable: Long mechanical and electrical service life reduces replacement and maintenance costs. Stable performance avoids equipment damage losses caused by circuit faults, creating long-term economic benefits for buyers.
-
Full Specification Coverage: Complete pole types and current specifications support one-stop procurement, meeting the matching needs of different engineering projects and terminal equipment.
-
Global Standard Certification: Compliant with international IEC standards, supporting export to Europe, Southeast Asia, Middle East, Africa and other global markets, meeting project bidding and access requirements.
-
Customization & OEM Support: Provide personalized customization services such as logo printing, packaging customization and parameter adjustment to support brand dealers and engineering project customization.
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. Contact Us
Looking for reliable wholesale miniature circuit breakers and professional low-voltage electrical solution suppliers? We provide high-quality MCB products with complete specifications, stable performance and competitive factory prices. Support global shipping, fast delivery and professional after-sales service. Welcome to contact us for free samples, latest quotation and technical parameter support!
1. Product Overview
Miniature Circuit Breaker (MCB), also known as micro circuit breaker, is a core low-voltage terminal power distribution protection device widely used in global residential, commercial and industrial electrical systems. Designed for AC 50/60Hz power circuits with rated voltage 230V/400V and rated current up to 63A, this compact circuit breaker provides reliable overload and short circuit protection, and supports infrequent manual switching of electrical circuits under normal operating conditions.
Our high-performance miniature circuit breakers adopt dual thermal and electromagnetic trip mechanisms, featuring fast response, high breaking capacity, long service life and stable operation. Strictly manufactured in compliance with international electrical standards, the MCB effectively prevents circuit burnout, equipment damage and electrical safety accidents caused by abnormal current, becoming an essential safety component for low-voltage power distribution systems worldwide.
2. Core Product Features
Our premium miniature circuit breakers stand out from ordinary air switches with multiple optimized designs, meeting the rigorous power safety requirements of global end-users and engineering projects:
-
Dual Protection Mechanism (Thermal + Electromagnetic Trip): Equipped with bimetallic strip thermal trip for overload protection and electromagnetic instantaneous trip for short circuit protection. It accurately identifies abnormal current states, cuts off the circuit within 0.1 seconds in case of short circuit, and delays power-off for mild overloads to avoid unnecessary power interruption, balancing safety and power supply stability.
-
High Breaking Capacity: Adopts optimized magnetic blow-out arc extinguishing technology and high-rigidity plastic shell structure. It can instantly break high fault current without arc splash or component ablation, effectively suppress fault diffusion, and adapt to complex grid environment with unstable current fluctuation.
-
Premium Material Configuration: The contact system is made of high-purity silver alloy material, which avoids welding failure caused by high-temperature current, ensures stable electrical conductivity, and greatly reduces contact resistance and heat generation. The flame-retardant engineering plastic shell is anti-aging, high-temperature resistant and insulation-safe, adapting to various harsh installation environments.
-
Long Service Life & Stable Performance: Supports tens of thousands of non-frequent closing and opening operations, with mechanical and electrical performance far exceeding industry standard values. It effectively reduces equipment replacement frequency and lowers long-term operation and maintenance costs for users.
-
Compact & Easy Installation: Modular miniaturized design saves installation space in distribution boxes. Equipped with combined wiring terminals, it supports quick connection of busbars and various wire specifications, realizing fast and standardized installation without complex tools.
-
Multiple Specifications & Wide Compatibility: Complete product series including 1P, 2P, 3P, 4P pole types, with current specifications covering 1A-63A. It perfectly matches residential lighting circuits, socket circuits, commercial power distribution and small industrial equipment power supply scenarios.
3. Technical Parameters
All miniature circuit breakers are tested and verified in strict accordance with IEC international standards, with standardized and transparent parameters to support global project bidding and engineering matching:
|
Parameter Item
|
Technical Specification
|
|---|---|
|
Product Name
|
LM47-63
|
|
Rated Frequency
|
50Hz / 60Hz
|
|
Rated Voltage
|
230V AC (1P); 400V AC (2P/3P/4P)
|
|
Rated Current Range
|
1A, 2A, 3A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
|
|
Breaking Capacity
|
4.5KA
|
|
Trip Characteristic
|
B / C / D Curve
|
|
Pole Number
|
1P, 2P, 3P, 4P
|
|
Shell Material
|
Flame-retardant ABS Engineering Plastic
|
|
Contact Material
|
Silver Alloy
|
|
Mechanical Life
|
≥10000 Times
|
|
Operating Temperature
|
-25℃ ~ +70℃
|
|
Execution Standard
|
IEC 60898-1, GB 10963.1
|
sion_table]
4. Working Principle
The miniature circuit breaker realizes full-range circuit protection through two core trip mechanisms, solving two major electrical faults of overload and short circuit:
Overload Protection (Thermal Trip): When the circuit current is slightly overloaded for a long time without short circuit fault, the internal bimetallic strip generates continuous heat due to overcurrent, and bends with temperature rise. When the deformation reaches the preset threshold, it pushes the tripping mechanism to disconnect the circuit, avoiding wire aging and insulation damage caused by long-term overload.
Short Circuit Protection (Electromagnetic Trip): In case of sudden short circuit fault and instantaneous surge current in the circuit, the electromagnetic coil generates strong magnetic force in an instant, driving the tripping mechanism to act quickly and cut off the power supply in milliseconds, preventing short circuit spark and high temperature from causing fire and equipment burnout accidents.
5. Wide Application Scenarios
Thanks to its compact structure, stable performance and high safety factor, our MCB circuit breakers are widely applicable to global low-voltage power distribution scenarios, covering civil, commercial and industrial fields:
-
Residential Buildings: Household lighting circuits, socket power supply, air conditioning and high-power electrical equipment circuits, providing basic household electricity safety protection.
-
Commercial Spaces: Office buildings, shopping malls, hotels, supermarkets and other commercial power distribution boxes, supporting long-term stable operation of commercial electrical equipment.
-
Industrial Scenarios: Small industrial equipment, workshop terminal power distribution, automation equipment circuits, adapting to frequent current fluctuation of industrial loads.
-
Public Facilities: Schools, hospitals, subway stations, street lighting and other public power supply systems, ensuring continuous and safe power supply for public facilities.
-
New Energy & Smart Systems: Smart home distribution systems, photovoltaic power generation terminal circuits, charging pile front-end protection circuits.
6. Product Advantages & Buyer Benefits
-
High Safety & Low Failure Rate: Strict factory testing and standardized production eliminate hidden dangers of electric leakage, failure to trip and spontaneous burnout. The high flame-retardant and insulation design ensures zero safety hazards in normal use.
-
Cost-Effective & Durable: Long mechanical and electrical service life reduces replacement and maintenance costs. Stable performance avoids equipment damage losses caused by circuit faults, creating long-term economic benefits for buyers.
-
Full Specification Coverage: Complete pole types and current specifications support one-stop procurement, meeting the matching needs of different engineering projects and terminal equipment.
-
Global Standard Certification: Compliant with international IEC standards, supporting export to Europe, Southeast Asia, Middle East, Africa and other global markets, meeting project bidding and access requirements.
-
Customization & OEM Support: Provide personalized customization services such as logo printing, packaging customization and parameter adjustment to support brand dealers and engineering project customization.
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. Contact Us
Looking for reliable wholesale miniature circuit breakers and professional low-voltage electrical solution suppliers? We provide high-quality MCB products with complete specifications, stable performance and competitive factory prices. Support global shipping, fast delivery and professional after-sales service. Welcome to contact us for free samples, latest quotation and technical parameter support!
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