The CHINT NXB-63 4P 3-Phase AC MCB Circuit Breaker is a dependable protection device engineered for modern electrical distribution systems. Designed for residential, commercial, and industrial use, it ensures safe operation by protecting circuits against overloads and short circuits.
With a rated current of 63A and a 4-pole (4P) configuration, this breaker is ideal for three-phase systems with neutral, providing complete isolation and protection across all lines. It supports a wide voltage range (220V–400V AC), making it suitable for various electrical installations.
The breaker features a 6kA breaking capacity, allowing it to safely interrupt fault currents and prevent damage to connected equipment. Its thermal-magnetic tripping mechanism ensures fast and accurate response during abnormal conditions, enhancing system safety and reliability.
Built according to IEC/EN 60898-1 standards, the NXB-63 series offers long service life, durability, and consistent performance. The compact DIN rail design allows easy installation in distribution boards, making it a practical solution for modern electrical panels.
This MCB is widely used in industrial machinery, commercial power distribution systems, HVAC systems, and large residential setups where reliable circuit protection is essential.
Key Features:
4-pole (4P) design for three-phase + neutral protection
Rated current: 63A
Breaking capacity: 6kA
Suitable for AC 220V–400V, 50/60Hz systems
Protection against overload and short circuit
Thermal-magnetic tripping mechanism
High reliability and long service life
DIN rail mounting for easy installation
Complies with IEC/EN 60898-1 standards



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