Product Detail
NB1-63DC Miniature Circuit Breaker
Standards & Certifications: IEC/EN 60947-2 | CCC | CE | CB | TÜV | RoHS
Rated Voltage (Ue): DC 250 V (1P), DC 500 V (2P), DC 1000 V (4P)
Rated Current (In): 1 A – 63 A
Poles: 1P / 2P / 4P
Tripping Curve: Type C (7–10 × In)
Rated Short-Circuit Breaking Capacity (Icu): 6 kA
Rated Impulse Withstand Voltage (Uimp): 4 kV
Operating Temperature: −35 °C ~ +70 °C
Altitude: ≤ 2000 m (derating above 2000 m)
Mechanical Life: 20 000 operations
Electrical Life: 1 500 operations
Connection Options: Lead wire and busbar compatible (dual connection)
Tightening Torque: 2 N·m
Conductor Capacity: up to 25 mm²
Installation: DIN rail mounting, plug-in structure
Protection Degree: IP20
Power Consumption (per pole): up to 16 W (at In ≤ 63 A)
Applications: DC distribution systems, PV arrays, energy storage units, EV chargers, and telecom power networks
The CHINT NB1-63DC DC Circuit Breaker provides dependable overload and short-circuit protection for DC systems up to 1000 V and 63 A. Compact and efficient, it is ideal for photovoltaic, energy storage, and communication power applications. With 6 kA breaking capacity and C-curve tripping characteristics, the NB1-63DC ensures fast, stable protection. Built to IEC/EN 60947-2 and RoHS standards, it features dual connection capability for cables or busbars, a long mechanical life, and easy DIN-rail installation.