NB1-63G Miniature Circuit Breaker

NB1-63G C63 4P-MCB

NB1-63G C63 1P-MCB

NB1-63G C63 2P-MCB

NB1-63G C63 3P-MCB

NB1-63G C63 1P-MCB-Front

NB1-63G C63 2P-MCB-Front

NB1-63G C63 3P-MCB-Front

NB1-63G C63 4P-MCB-Front

NB1-63G C63-MCB-Side

NB1-63G C63 4P-MCB

NB1-63G C63 1P-MCB

NB1-63G C63 2P-MCB

NB1-63G C63 3P-MCB

NB1-63G C63 1P-MCB-Front

NB1-63G C63 2P-MCB-Front

NB1-63G C63 3P-MCB-Front

NB1-63G C63 4P-MCB-Front

NB1-63G C63-MCB-Side

NB1-63G Miniature Circuit Breaker

The CHINT NB1-63G Miniature Circuit Breaker (MCB) offers reliable overload and short-circuit protection for residential, commercial, and industrial electrical systems. With up to 6 kA breaking capacity and B/C tripping characteristics, it ensures high safety and dependable performance. Its compact DIN-rail design, color-coded status indicator, and trip-free mechanism make it ideal for modern distribution panels. Compliant with IEC/EN 60898-1, the NB1-63G combines safety, durability, and easy installation in one efficient MCB.

Product Information

Standard: IEC/EN 60898-1
Rated Voltage (Ue): AC 230/400 V
Rated Insulation Voltage (Ui): 500 V
Rated Frequency: 50/60 Hz
Rated Current (In): 1–63 A
Rated Short-Circuit Breaking Capacity (Icu): 6,000 A
Tripping Characteristics: Type B (3–5 In) / Type C (5–10 In)
Energy Limiting Class: 3
Rated Impulse Withstand Voltage (Uimp): 4 kV
Dielectric Test Voltage (1 min): 2 kV
Thermal Element Reference Temperature: 30 °C
Ambient Operating Temperature: −5 °C to +40 °C (storage −25 °C to +70 °C)
Mechanical Life: 20,000 operations
Electrical Life: 4,000 operations
Mounting: DIN-rail EN 60715 (35 mm)
Connection: Top or bottom feed
Terminal Type: Cable / U-type busbar / Pin-type busbar
Terminal Size: Up to 25 mm² (busbar) | 10 mm² (cable)
Tightening Torque: 2.5 N·m
Protection Degree: IP20
Auxiliary Accessories: Shunt release, under-voltage release, alarm, auxiliary contact
Power Loss (per pole): Max. 5 W
Contact Position Indicator: Color-coded for clear ON/OFF status
Trip-Free Mechanism: Prevents manual locking during fault conditions

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NB1-63G-MCB-Catalog.pdf

553.72KB

2025-12-10

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2004-NB1-63G-MCB-Manual.pdf

891.5KB

2024-09-22

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2201-NB1-63G-MCB-REACH Declaration Certificate.pdf

335.67KB

2024-09-22

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2201-NB1-63G-MCB-CE Declaration Certificate.pdf

897.7KB

2024-09-22

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1611-NB1-63G-MCB-VDE Certificate.pdf

668.66KB

2024-09-22

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NB1-63G 1P-MCB-Drawing.stp

5.66MB

2024-09-22

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NB1-63G 2P-MCB-Drawing.stp

12.3MB

2024-09-22

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NB1-63G 1P-MCB-Drawing.dwg

102.42KB

2024-09-22

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NB1-63G 3P-MCB-Drawing.stp

9.83MB

2024-09-22

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NB1-63G 4P-MCB-Drawing.stp

12.91MB

2024-09-22

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FAQs

What is the primary function of the NB1-63G Miniature Circuit Breaker?

It protects electrical circuits from overload and short-circuit faults, ensuring safe operation of connected equipment in residential, commercial, and light industrial installations.

What tripping characteristics does it provide?

The NB1-63G is available in Type B and C curves, allowing protection for resistive and inductive loads respectively. Type B is ideal for general lighting or heating circuits, while Type C suits inductive loads like motors.

What is its breaking capacity?

It offers a 6 kA breaking capacity, suitable for standard low-voltage distribution systems, ensuring circuit interruption under high fault conditions.

How easy is it to install and maintain?

With a DIN-rail clip design, top/bottom feed compatibility, and busbar connection support, the NB1-63G ensures quick installation and efficient wiring for multi-device configurations.

What makes the NB1-63G safe to operate?

It includes a trip-free mechanism (prevents holding during faults), color-coded contact indicator, and IP20 protection, ensuring operational safety and clear visual status.