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NB1-63DC DC Circuit Breaker

NB1-63DC C63A 2P-MCB

NB1-63DC C63A 1P-MCB

NB1-63DC C63A 4P-MCB

NB1-63DC C63A 2P-MCB-Front

NB1-63DC C63A-MCB-Side

NB1-63DC C63A 1P-MCB-Front

NB1-63DC C63A 4P-MCB-Front

NB1-63DC C63A 2P-MCB

NB1-63DC C63A 1P-MCB

NB1-63DC C63A 4P-MCB

NB1-63DC C63A 2P-MCB-Front

NB1-63DC C63A-MCB-Side

NB1-63DC C63A 1P-MCB-Front

NB1-63DC C63A 4P-MCB-Front

NB1-63DC DC Circuit Breaker

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.

Product Information

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

Name

Size

Release time

Operate

NB1-63DC-MCCB-Catalog.pdf

385.2KB

2025-12-10

Download

Name

Size

Release time

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2105-NB1-63DC-MCB-Manual(EN).pdf

4MB

2024-12-18

Download

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Size

Release time

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2408-NB1-63DC-MCCB-REACH Declaration Certificate.pdf

363.87KB

2024-09-22

Download

2206-NB1-63DC-MCCB-EAC Certificate.pdf

619KB

2024-09-22

Download

2201-NB1-63DC-MCCB-CE Declaration RoHS Certificate.pdf

837.93KB

2024-09-22

Download

2110-NB1-63DC-MCCB-CE Certificate.pdf

5.65MB

2024-09-22

Download

2110-NB1-63DC-MCCB-TUV Certificate.pdf

5.65MB

2024-09-22

Download

2105-NB1-63DC-MCCB-UKCA Certificate.pdf

103.18KB

2024-09-22

Download

1902-NB1-63DC-MCCB-IRAM Certificate.pdf

1.01MB

2024-09-22

Download

1705-NB1-63DC-MCCB-EAC Certificate.pdf

358.48KB

2024-09-22

Download

Name

Size

Release time

Operate

NB1-63DC-4P-3D(V1)-MCB-Drawing.igs

51.91MB

2024-09-22

Download

NB1-63DC-2P-2D(V1)-MCB-Drawing.dwg

277.19KB

2024-09-22

Download

NB1-63DC-1P-2D(V1)-MCB-Drawing.dwg

1.06MB

2024-09-22

Download

NB1-63DC-2P-3D(V1)-MCB-Drawing.igs

27.04MB

2024-09-22

Download

NB1-63DC-4P-2D(V1)-MCB-Drawing.dwg

297.57KB

2024-09-22

Download

NB1-63DC-1P-3D(V1)-MCB-Drawing.igs

27.38MB

2024-09-22

Download

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FAQs

What is the main purpose of the NB1-63DC DC Circuit Breaker?

It protects DC circuits against overload and short-circuit faults, ensuring stable operation in photovoltaic, battery storage, and communication systems.

What voltage levels does the NB1-63DC support?

It is rated for DC 250 V (1P), DC 500 V (2P), and DC 1000 V (4P) systems, offering flexibility across low- and high-voltage DC applications.

What is the breaking capacity of this circuit breaker?

The NB1-63DC offers a 6 kA short-circuit breaking capacity, ensuring reliable interruption even under high fault conditions.

How long is its service life?

It delivers a mechanical life of 20,000 cycles and an electrical life of 1,500 cycles, ensuring long-term dependability in demanding environments.

Can it operate in high-temperature or high-altitude environments?

Yes. The NB1-63DC works from −35 °C to +70 °C and up to 2000 m altitude. Derating curves are available for extended altitude or higher ambient temperatures.