NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

NXB-63 Miniature Circuit Breaker

The CHINT NXB-63 is a modular miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in AC circuits up to 415 V. Built to IEC/EN 60898-1 standards, it is suitable for residential, commercial, and light-industrial distribution applications requiring precise circuit isolation and safety.

Product Information

Standards: IEC/EN 60898-1
Rated current (In): 1 A – 63 A
Rated operating voltage (Ue): 220/230/240 V ~ (1P, 1P+N, 2P); 380/400/415 V ~ (2P – 4P)
Rated frequency: 50/60 Hz
Rated short-circuit breaking capacity (Icn): 6 kA (standard); 10 kA optional (H type only)
Rated insulation voltage: (Ui) 500 V
Rated impulse withstand voltage (Uimp): 4 kV
Tripping characteristics: Type B (3–5 × In), C (5–10 × In), D (10–16 × In)
Mechanical life: 20 000 operations
Electrical life: 10 000 operations
Protection degree: IP20 (device only) / IP40 (in distribution box)
Mounting: TH35-7.5 DIN rail
Terminal capacity: 1 – 25 mm² (copper only)
Operating temperature: –35 °C to +70 °C

Name

Size

Release time

Operate

NXB-63-MCB-catalog.pdf

820.41KB

2025-04-02

Download

Name

Size

Release time

Operate

2004-NXB-63-MCB-Manual.pdf

323.32KB

2024-09-22

Download

Name

Size

Release time

Operate

2407-NXB-63-MCB-CB Certificate.pdf

761.5KB

2024-09-22

Download

2407-NXB-63-MCB-CE Certificate.pdf

721.12KB

2024-09-22

Download

2404-NXB-63-MCB-CE RoHS Declaration Certificate.pdf

136.19KB

2024-09-22

Download

2404-NXB-63-MCB-SAA Certificate.pdf

670.18KB

2024-09-22

Download

2404-NXB-63-MCB-CE Declaration Certificate.pdf

136.17KB

2024-09-22

Download

2402-NXB-63-MCB-SIRIM Certificate.pdf

1.28MB

2024-09-22

Download

2401-NXB-63-MCB-SII Certificate.pdf

789.77KB

2024-09-22

Download

2311-NXB-63 3P C6-MCB-KC Certificate.pdf

741.8KB

2024-09-22

Download

2311-NXB-63 2P C6-MCB-KC Certificate.pdf

779.34KB

2024-09-22

Download

2311-NXB-63 1P C32-MCB-KC Certificate.pdf

714.56KB

2024-09-22

Download

2311-NXB-63-MCB-Carbon Footprint Certificate.pdf

540.54KB

2024-09-22

Download

2311-NXB-63 2P C32-MCB-KC Certificate.pdf

724.58KB

2024-09-22

Download

2311-NXB-63 2P C63-MCB-KC Certificate.pdf

721.86KB

2024-09-22

Download

2311-NXB-63 1P C63-MCB-KC Certificate.pdf

723.4KB

2024-09-22

Download

2311-NXB-63 4P C6-MCB-KC Certificate.pdf

818.75KB

2024-09-22

Download

2311-NXB-63 4P C32-MCB-KC Certificate.pdf

753.72KB

2024-09-22

Download

2311-NXB-63 4P C63-MCB-KC Certificate.pdf

747.44KB

2024-09-22

Download

2311-NXB-63 3P C32-MCB-KC Certificate.pdf

737.01KB

2024-09-22

Download

2311-NXB-63 3P C63-MCB-KC Certificate.pdf

751.24KB

2024-09-22

Download

2307-NXB-63-MCB-SNI Certificate.pdf

1.17MB

2024-09-22

Download

2305-NXB-63-MCB-SLS Certificate.pdf

3.16MB

2024-09-22

Download

2303-NXB-63-MCB-NOM Certificate.pdf

784.87KB

2024-09-22

Download

2211-NXB-63-MCB-INMETRO Certificate.pdf

798.35KB

2024-09-22

Download

2211-NXB-63-MCB-REACH Declaration Certificate.pdf

576.32KB

2024-09-22

Download

2206-NXB-63-MCB-EAC Certificate.pdf

617.76KB

2024-09-22

Download

2205-NXB-63-MCB-TUV Certificate.pdf

1.28MB

2024-09-22

Download

2104-NXB-63-MCB-UKCA Certificate.pdf

410.41KB

2024-09-22

Download

1808-NXB-63-MCB-IRAM Certificate.pdf

5.34MB

2024-09-22

Download

Name

Size

Release time

Operate

NXB-63-MCB-Drawing-1P-2D.dwg

92.41KB

2024-09-22

Download

NXB-63-MCB-Drawing-2P-2D.dwg

284.82KB

2024-09-22

Download

NXB-63-MCB-Drawing-3P-2D.dwg

288.15KB

2024-09-22

Download

NXB-63-MCB-Drawing-4P-2D.dwg

292.51KB

2024-09-22

Download

Play Video

Need Support From Us?

Blog

Blog

Find expert perspectives on the trends and technologies driving your business.

View Now

Download Center

Download Center

Download new and previously released documents including product document, solutions, cases, coporate report.

View Now

Contact Us

Reach out to us to receive more information, technical support, assistance with complaints and more.

Collapsed

Expand

FAQs

What type of protection does the NXB-63 provide?

The NXB-63 offers overload and short-circuit protection for low-voltage AC circuits up to 415 V. It automatically disconnects the circuit when abnormal current or fault conditions occur, preventing wiring and equipment damage. It can also be manually used to isolate circuits during maintenance.

Where can the NXB-63 be installed and how is it mounted?

It is designed for TH35-7.5 DIN-rail mounting inside electrical distribution panels. The breaker should only be installed in dry, non-corrosive environments and not in areas with explosive gases or condensation. It must be installed by a qualified electrician with the power switched off.

What wiring and torque requirements should be followed?

The NXB-63 uses copper conductors only.

Recommended conductor sizes and torque:

1 – 6 A: 1 mm²
10 – 20 A: 1.5 – 2.5 mm²
25 – 32 A: 4 – 6 mm²
40 – 63 A: 10 – 16 mm²

Tighten terminal screws to 2.0 N·m torque to ensure proper contact and avoid overheating or loose connections.

What do the B, C, and D trip curves mean for the NXB-63?

The NXB-63 is available with B, C, or D tripping characteristics under IEC 60898-1:

B-curve (3–5 × In): for resistive loads like lighting and heating.
C-curve (5–10 × In): for mixed or moderately inductive loads such as appliances or motors.
D-curve (10–16 × In): for high-inrush loads like transformers and pumps

This allows users to select the right breaker type based on application needs.

How can I tell if the NXB-63 is ON or OFF?

A color indicator window on the front shows the status:

Red = ON (contacts closed, circuit energized)
Green = OFF (contacts open, circuit isolated)

This visual cue helps ensure clear operational safety during inspection and maintenance.