The CHINT NB1-63DC 63A 500V DC Miniature Circuit Breaker (MCB) is a specialized protection device engineered for direct current (DC) applications such as solar photovoltaic (PV) systems, battery storage setups, and communication power systems. It ensures safe and efficient operation by protecting circuits from overload and short circuit faults.
With a rated current of 63A and voltage support up to 500V DC (2-pole configuration), this breaker is ideal for medium-scale solar systems and DC distribution panels. It is designed to handle the unique challenges of DC circuits, where arc suppression and fault interruption require higher reliability compared to AC systems.
The NB1-63DC features a high breaking capacity of up to 6kA, allowing it to quickly and safely interrupt fault currents. Its thermal-magnetic tripping mechanism ensures fast and accurate response during abnormal conditions, protecting sensitive equipment such as inverters and batteries.
Built according to IEC/EN 60947-2 standards, this MCB offers excellent durability, safety, and compliance with international electrical standards. It supports multiple pole configurations (1P, 2P, 4P), making it versatile for different DC system requirements.
The compact modular design allows easy DIN rail mounting, making installation simple in combiner boxes and distribution boards. Its robust construction and long mechanical life ensure reliable performance in demanding environments.
This breaker is widely used in solar energy systems, battery banks, and DC circuits where dependable protection and system safety are essential.
Key Features:
Rated current: 63A
Rated voltage: up to 500V DC (2P)
Breaking capacity: 6kA
Protection against overload and short circuit
Designed for solar PV, battery, and DC systems
Thermal-magnetic tripping mechanism
Available in 1P, 2P, and 4P configurations
DIN rail mounting for easy installation
Complies with IEC/EN 60947-2 standards
Durable construction with long service life
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