Product Category

Electrical Supplies

Circuit Breakers

Miniature Circuit Breakers (MCBs)

Three-Phase Electrical Protection

Brand

CHINT

Model

NB1-63 4P 63A (Type C)

Condition

New

Protect three-phase electrical systems with the CHINT NB1-63 4P 63A Miniature Circuit Breaker. Designed for reliable overload and short-circuit protection, this 4-pole, 63A AC breaker features a 6kA breaking capacity, DIN-rail mounting, and compliance with IEC/EN 60898-1 and IEC/EN 60947-2 standards, making it suitable for commercial, industrial, and residential distribution boards. 

Product Description

The CHINT NB1-63 4P 63A AC Miniature Circuit Breaker (MCB) is engineered to provide dependable protection for three-phase electrical installations. It safeguards circuits against overloads and short circuits while allowing safe isolation of all four poles simultaneously.

With a 63A rated current, Type C tripping characteristic, and 6kA breaking capacity, the breaker is ideal for distribution boards, industrial control panels, commercial buildings, generator systems, and solar AC distribution applications. Its compact DIN-rail design ensures easy installation and reliable long-term performance. 

Key Features

Genuine CHINT Miniature Circuit Breaker

Model: NB1-63

Four Pole (4P)

Rated Current: 63A

Type C Tripping Curve

6kA Breaking Capacity

230/400V AC Operation

50/60Hz Frequency

DIN Rail Mounting

Overload Protection

Short-Circuit Protection

Compact Modular Design

Long Mechanical Service Life

Maintenance-Free Operation

Technical Specifications

Specification Details

Brand CHINT

Model NB1-63

Poles 4P

Rated Current 63A

Tripping Curve Type C

Rated Voltage 230/400V AC

Frequency 50/60Hz

Breaking Capacity 6kA

Mounting 35mm DIN Rail

Standards IEC/EN 60898-1, IEC/EN 60947-2

Application AC Distribution Systems

Verify the exact tripping curve (B, C, or D) printed on the breaker before listing, as the NB1-63 series is available in multiple variants.

Applications

Three-Phase Distribution Boards

Commercial Buildings

Industrial Facilities

Generator Distribution Panels

Solar AC Distribution Boards

Manufacturing Plants

Office Buildings

Hotels

Hospitals

Shopping Complexes

Package Includes

1 × CHINT NB1-63 4P 63A Miniature Circuit Breaker

Warranty

Manufacturer's warranty (subject to CHINT distributor terms and conditions).

Frequently Asked Questions (FAQ)

1. What does 4P mean?

It means the breaker has four poles, allowing simultaneous switching and protection of three-phase systems and the neutral where required.

2. What is the rated current?

The breaker is rated at 63 Amps.

3. What is the breaking capacity?

It has a 6kA short-circuit breaking capacity. 

4. Is it suitable for three-phase electrical systems?

Yes. It is designed for AC three-phase distribution and protection.

5. Can it be used in solar installations?

Yes. It is suitable for the AC side of solar power systems. It is not intended for DC PV string protection.

6. Is it DIN-rail mountable?

Yes. It is designed for standard 35mm DIN rail installation.