Solar DC mini circuit breaker
The BB1-125 Series PV DC Circuit Breaker is designed to provide reliable overload, short-circuit, and isolation protection for photovoltaic (PV) and energy storage DC power systems. Engineered for high-voltage DC applications, it supports a rated operating voltage up to 1000V DC and rated current up to 125A, making it ideal for protecting solar arrays, combiner boxes, battery energy storage systems (BESS), and DC distribution equipment.
Featuring an advanced arc extinguishing and current-limiting system, the breaker rapidly interrupts fault currents and minimizes electrical hazards associated with DC circuits. Integrated reverse current protection helps improve system stability and protects critical equipment, ensuring long-term, reliable operation in demanding renewable energy applications.
1.Brand
2.Type
3.Rated Current
4.Rated voltage
5.Tripping characteristic
6.Indicating window
7.Product wiring diagram
SPECIFICATION:
| Electric Parameter | |||||||||
| Standard Category | PV Standard Circuit Breaker | DC Standard Circuit Breaker | |||||||
| Standard | IEC 60947-2,GB/T 14048.2 | AS/NZS IEC 60947.2 | |||||||
| Product Certificate | CCC,CE,CB | AS | |||||||
| Pole | 1P | 2P | 3P | 4P | 1P | 2P | 3P | 4P | |
| Rated Working Voltage Ue |
250V | 500V | 750V | 1000V | 125V | 250V | 375V | 500V | |
| Maximum current of shell frame Ith |
125A | ||||||||
| Rated Working Current In |
80A,100A,125A | ||||||||
| Rated Insulation Voltage Ui |
DC 1000V | ||||||||
| Rated Impulse Voltage Uimp |
6kV | ||||||||
| Run Breaking Capacity Icu |
10kA | ||||||||
| Untimate Breaking Capacity Ics |
6kA | ||||||||
| Flashover distance | < 50mm | ||||||||
| Product Unipolar Internal Resistance | < 5mΩ | ||||||||
| Trip Type | Thermomagnetic type | ||||||||
| Service life | |||||||||
| Mechanical life | 10000 | 10000 | |||||||
| Electrical life | 300 | 1000 | |||||||
| Installation Environment | |||||||||
| Protection Degree | Side IP40, cable port IP20 | ||||||||
| Wiring Capacity | 2.5mm²~50mm² | ||||||||
| Wiring Torque M7 |
3.5N·m~5N·m | ||||||||
| Working Temperature | -40°C~+80°C | ||||||||
| Storage Temperature | -40°C~+85°C | ||||||||
| Resistance to moisture and heat | Ⅱ (Humidity 55°C,relative humidity 95%) | ||||||||
| Fixed installation | Fixed to the 35mm guide rail | ||||||||
| Stripping Length | 16mm-17mm | ||||||||
Features：
- Non-polar
more convenient installation
- High short-circuit breaking ability
- Overload protection
short circuit protection
Off-frequency operation
- Rated current up to 125A
- Comply with:
IEC 60947-2,GB/T 14048.2
Typical Applications：
The BB1-125 Series PV DC Circuit Breaker is widely used in:
- Solar PV combiner boxes
- Battery Energy Storage Systems (BESS)
- DC distribution cabinets
- Photovoltaic power stations
- Residential and commercial rooftop solar systems
- Off-grid and hybrid solar power systems
- Industrial DC power distribution equipment
Key Benefits：
- Rated operating voltage up to 1000V DC
- Rated current up to 125A
- Fast DC fault interruption
- Advanced arc extinguishing technology
- Reverse current protection
- High breaking performance
- Reliable protection for PV and energy storage systems
- Long electrical and mechanical service life
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