CHINT NB1-63 C63 63A 2-Pole 400V 6kA AC Miniature Circuit Breaker

Product Identification

The supplied image matches CHINT's official NB1-63 series. Its front marking identifies the exact C63, 2-pole, 400V AC, 6000A variant manufactured to IEC/EN 60898-1.

Short Description

The CHINT NB1-63 C63 is a 63A, 2-pole, C-curve miniature circuit breaker for compatible 400V AC distribution systems. It provides overload and short-circuit protection, offers 6kA rated breaking capacity, includes visible contact-position indicators and mounts on a standard 35mm DIN rail.

Long Description

The CHINT NB1-63 C63 2P MCB provides dependable protection and switching for compatible low-voltage AC distribution circuits. This exact supplied variant is marked C63, 2P, 400V AC and 6000A, while CHINT officially specifies 50/60Hz operation and compliance with IEC/EN 60898-1.

Its C-curve thermal-magnetic release is intended for resistive and inductive loads with low inrush current. The two poles operate through a mechanically linked blue handle, while front contact-position windows support quick visual status checks. The device provides overload and short-circuit protection and can also be used for circuit isolation and infrequent switching under normal conditions.

The breaker is designed for standard 35mm DIN-rail installation, accepts top or bottom feed and supports cable or compatible busbar connections. Final product selection, conductor sizing, fault-level coordination and installation must be completed by a qualified electrician in accordance with local regulations.

Key Features

• 63A rated current

• Two-pole mechanically linked operation

• C-curve thermal-magnetic release, 5–10 × In

• 6kA rated short-circuit breaking capacity

• Overload-current protection

• Short-circuit-current protection

• 400V AC, 50/60Hz operation for this 2P variant

• Contact-position indication windows

• Switch and isolation functionality

• Energy-limiting class 3

• 35mm DIN-rail mounting

• Top or bottom feed connection

Technical Specifications

Applications

• Residential distribution boards

• Commercial buildings

• Light-industrial distribution systems

• Branch-circuit protection

• Resistive and low-inrush inductive loads

• Two-pole AC isolation and switching

• AC-side protection in compatible solar and hybrid installations

Important: This product is identified as an AC MCB. Do not use it as a substitute for a DC breaker, residual-current device or surge-protection device. Installation must be completed by a qualified electrician.

Box Contents

• 1 × CHINT NB1-63 C63 63A 2P AC MCB

• Printed manual or certificate inside retail packaging: Not Verified

• DIN rail: Not Included / Not Verified

• Cables, busbars and enclosure: Not Included / Not Verified

Protection Features

• Thermal overload protection

• Magnetic short-circuit protection

• 6kA rated short-circuit breaking capacity

• Mechanically linked two-pole switching

• Contact-position indication

• Positive isolation / isolation function

• Energy-limiting class 3

• IP20 enclosure protection

Not included or not specified: residual-current/earth-leakage protection, surge protection, arc-fault protection, automatic transfer, remote monitoring and over/under-voltage protection.

Certifications

Warranty

Official warranty duration and Pakistan claim procedure for this exact NB1-63 C63 2P unit: Not Verified.