LMB1-63DC 1P 2P 3P 4P DC MCB Miniature Circuit Breaker For Solar PV System
LMB1-63DC 1P 2P 3P 4P DC MCB Miniature Circuit Breaker For Solar PV System
Rated current(In):6A,10A,16A,20A,32A,40A,50A,63A
Rated voltage Ue: 1P(DC250V), 2P(DC500V), 3P(DC750V), 4P(DC1000V)
Number of poles:1P,2P,3P,4P
Mechanical life:20000 cycles
Electrical life:10000 cycles
Rated short-circuit breaking capacity(Icn):6kA
Rated impulse withstand voltage(Uimp):4kV
Rated current(In):6A,10A,16A,20A,32A,40A,50A,63A
Rated voltage Ue: 1P(DC250V), 2P(DC500V), 3P(DC750V), 4P(DC1000V)
Number of poles:1P,2P,3P,4P
Mechanical life:20000 cycles
Electrical life:10000 cycles
Rated short-circuit breaking capacity(Icn):6kA
Rated impulse withstand voltage(Uimp):4kV
1. Product Overview
The LVMA LMB1-63DC series is a dedicated DC miniature circuit breaker engineered for high-performance direct current protection, widely applied in solar photovoltaic systems, lithium-ion battery energy storage, off-grid power stations, DC distribution cabinets and portable power supplies.
Available in four pole options: 1P, 2P, 3P, 4P, with dual voltage ratings DC500V and DC1000V to match different solar string voltage requirements. Equipped with a specialized DC arc-extinguishing chamber, this DC MCB effectively suppresses DC electric arcs during fault disconnection, eliminating fire hazards caused by unquenched arcs common with ordinary AC breakers.
All units pass strict IEC60947-2 international testing and carry CE certification, with a standard 35mm DIN rail design for fast, universal installation in global electrical enclosures.
2. Core Features
- Professional DC Arc Extinction Design: Adopts special DC arc extinguishing structure, which can quickly cut off DC current, avoid continuous DC arc combustion, and solve the pain point of difficult DC circuit breaking.
- Full Safety Protection: Integrates overload protection and short circuit protection. It will automatically trip when the circuit is overloaded or short-circuited to protect DC electrical equipment from damage.
- Wide Current & Voltage Range: Supports multiple specifications 10A/16A/20A/32A/40A/63A, compatible with common DC voltage systems, meeting different solar and energy storage project needs.
- High-quality Fireproof Material: The shell is made of high-strength anti-flame engineering plastic, high temperature resistant, anti-aging, anti-breakdown, ensuring long-term stable operation in harsh outdoor and electrical environments.
- Standard DIN Rail Mount: Compatible with standard DIN rail installation, easy and fast to install, no complicated wiring, suitable for quick assembly of power distribution boxes.
- Stable & Durable Performance: Precise internal electromagnetic structure, sensitive tripping, stable mechanical performance, long service life, reducing equipment maintenance and replacement costs.
3. Product Specifications
Item | Specification |
|---|---|
Product Name | DC Miniature Circuit Breaker (DC MCB) |
| Protection | Overcurrent and short circuit |
| Type of trip | Thermo-magnetic |
| Rated voltage(Ue) | 1P(250VDC),2P(500VDC),3P/4P(1000VDC) |
| Rated currents(In) | 6,10,16,20,25,32,40,50,63A |
Application | Solar PV System, Battery Storage, Off-grid Power, RV DC System |
Mounting Type | Standard DIN Rail Mount |
Protection Function | Overload Protection, Short Circuit Protection |
Shell Material | Anti-flame & High-temperature Resistant Plastic |
Feature | Fast Tripping, DC Arc Extinction, Durable |
Standards | IEC/EN60947-2 |
4. Main Application Scenarios
- Rooftop residential solar PV systems
- Commercial & industrial photovoltaic power stations
- Lithium battery energy storage cabinet / battery bank protection
- Off-grid solar power supply system
- RV, caravan, yacht DC power circuit
- DC charging pile front-end protection
- Small DC industrial control equipment
5. Installation & Operation Instructions
- Install the breaker on standard 35mm DIN rail inside DC distribution box.
- Connect DC positive cable to the “+” terminal and DC negative cable to the “-” terminal strictly follow polarity mark.
- Push green operating handle upward for circuit ON; pull downward for circuit OFF and isolation.
- Once overcurrent or short-circuit fault occurs, the handle will automatically trip to middle position. Cut off power then reset handle after troubleshooting.
- Do not use AC circuit breakers to replace this DC MCB for PV systems, otherwise arc failure and fire hazard may happen
6. FAQ
Q1: Can this MCB be used for solar panel DC side?
Q2: Why choose 2P DC breaker instead of 1P?
Q3: What breaking capacity do I need for small home solar?
7. Purchase & Support
1. Product Overview
The LVMA LMB1-63DC series is a dedicated DC miniature circuit breaker engineered for high-performance direct current protection, widely applied in solar photovoltaic systems, lithium-ion battery energy storage, off-grid power stations, DC distribution cabinets and portable power supplies.
Available in four pole options: 1P, 2P, 3P, 4P, with dual voltage ratings DC500V and DC1000V to match different solar string voltage requirements. Equipped with a specialized DC arc-extinguishing chamber, this DC MCB effectively suppresses DC electric arcs during fault disconnection, eliminating fire hazards caused by unquenched arcs common with ordinary AC breakers.
All units pass strict IEC60947-2 international testing and carry CE certification, with a standard 35mm DIN rail design for fast, universal installation in global electrical enclosures.
2. Core Features
- Professional DC Arc Extinction Design: Adopts special DC arc extinguishing structure, which can quickly cut off DC current, avoid continuous DC arc combustion, and solve the pain point of difficult DC circuit breaking.
- Full Safety Protection: Integrates overload protection and short circuit protection. It will automatically trip when the circuit is overloaded or short-circuited to protect DC electrical equipment from damage.
- Wide Current & Voltage Range: Supports multiple specifications 10A/16A/20A/32A/40A/63A, compatible with common DC voltage systems, meeting different solar and energy storage project needs.
- High-quality Fireproof Material: The shell is made of high-strength anti-flame engineering plastic, high temperature resistant, anti-aging, anti-breakdown, ensuring long-term stable operation in harsh outdoor and electrical environments.
- Standard DIN Rail Mount: Compatible with standard DIN rail installation, easy and fast to install, no complicated wiring, suitable for quick assembly of power distribution boxes.
- Stable & Durable Performance: Precise internal electromagnetic structure, sensitive tripping, stable mechanical performance, long service life, reducing equipment maintenance and replacement costs.
3. Product Specifications
Item | Specification |
|---|---|
Product Name | DC Miniature Circuit Breaker (DC MCB) |
| Protection | Overcurrent and short circuit |
| Type of trip | Thermo-magnetic |
| Rated voltage(Ue) | 1P(250VDC),2P(500VDC),3P/4P(1000VDC) |
| Rated currents(In) | 6,10,16,20,25,32,40,50,63A |
Application | Solar PV System, Battery Storage, Off-grid Power, RV DC System |
Mounting Type | Standard DIN Rail Mount |
Protection Function | Overload Protection, Short Circuit Protection |
Shell Material | Anti-flame & High-temperature Resistant Plastic |
Feature | Fast Tripping, DC Arc Extinction, Durable |
Standards | IEC/EN60947-2 |
4. Main Application Scenarios
- Rooftop residential solar PV systems
- Commercial & industrial photovoltaic power stations
- Lithium battery energy storage cabinet / battery bank protection
- Off-grid solar power supply system
- RV, caravan, yacht DC power circuit
- DC charging pile front-end protection
- Small DC industrial control equipment
5. Installation & Operation Instructions
- Install the breaker on standard 35mm DIN rail inside DC distribution box.
- Connect DC positive cable to the “+” terminal and DC negative cable to the “-” terminal strictly follow polarity mark.
- Push green operating handle upward for circuit ON; pull downward for circuit OFF and isolation.
- Once overcurrent or short-circuit fault occurs, the handle will automatically trip to middle position. Cut off power then reset handle after troubleshooting.
- Do not use AC circuit breakers to replace this DC MCB for PV systems, otherwise arc failure and fire hazard may happen
6. FAQ
Q1: Can this MCB be used for solar panel DC side?
Q2: Why choose 2P DC breaker instead of 1P?
Q3: What breaking capacity do I need for small home solar?
7. Purchase & Support
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