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Chint NXB-63 4P C40 Miniature Circuit Breaker – 40A, 6kA Breaking Capacity, Type C Curve, 4 Pole MCB for Heavy-Duty Three-Phase + Neutral Protection
Chint NXB-63 4P C40 Miniature Circuit Breaker – 40A, 6kA Breaking Capacity, Type C Curve, 4 Pole MCB for Heavy-Duty Three-Phase + Neutral Protection
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Product Code: NXB-63-4P-C40
Brand: Chint
Product Type: Miniature Circuit Breaker (MCB)
Pole Configuration: 4 Pole (4P)
Rated Current: 40 Amperes (40A)
Tripping Curve: Type C
Breaking Capacity: 6kA
Compliance Standard: IEC/EN 60898-1
Mounting Type: DIN Rail
Product Overview
The Chint NXB-63 4P C40 MCB is a high-performance miniature circuit breaker designed to protect three-phase systems with neutral against overload and short-circuit faults. With a 40A current rating and a Type C tripping curve, it’s suited for circuits with moderate inrush current—such as those powering large HVAC units, motorized equipment, or industrial panels.
Its 6kA breaking capacity ensures dependable protection in demanding environments, and the 4-pole configuration guarantees full disconnection of all live and neutral conductors.
Key Features
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🔋 40A Rated Current – Suitable for high-load three-phase + neutral circuits
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⚡ 6kA Short-Circuit Protection – Ensures safe power interruption under fault conditions
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🔄 Type C Tripping Curve – Ideal for inductive and surge-prone applications
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🔌 4-Pole Isolation (4P) – Simultaneous disconnection of L1, L2, L3, and Neutral
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🧲 DIN Rail Mounting – Fast, secure installation in standard electrical panels
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✅ Certified to IEC/EN 60898-1 – Globally recognized safety and quality compliance
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Chint |
| Series | NXB-63 |
| Rated Current (In) | 40A |
| Voltage Rating (Ue) | 400V AC |
| Number of Poles | 4P (Three Phase + Neutral) |
| Tripping Curve | Type C |
| Breaking Capacity | 6kA |
| Frequency | 50/60 Hz |
| Mounting Type | DIN Rail |
| Operating Temperature | -5°C to +40°C |
| Compliance Standard | IEC/EN 60898-1 |
Typical Applications
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Industrial sub-distribution panels
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Large three-phase HVAC or refrigeration systems
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Motor control centers and pump stations
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Heavy-duty workshop and machinery circuits
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Commercial buildings requiring full-phase isolation
Why Choose Chint NXB-63 4P C40?
The NXB-63 4P C40 MCB is the smart choice for engineers and electricians looking for full-phase + neutral protection in high-load installations. Built to Chint’s globally trusted standards, it offers reliable performance, safe disconnection, and easy DIN rail installation in any demanding electrical setup.
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