NXB-125G Miniature Circuit Breaker Datasheet & Manual

NXB-125G Miniature Circuit Breaker

The CHINT NXB-125G Miniature Circuit Breaker provides advanced overload, short-circuit, and isolation protection for AC circuits up to 400 V and 125 A. With a high breaking capacity of 10 kA, multiple tripping curves (B, C, D, and OV), and a durable mechanical life of 20,000 operations, it ensures stable and safe circuit control. Built to IEC/EN 60898-1 standards, the NXB-125G delivers dependable performance in residential, commercial, and industrial power distribution environments.

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FAQs

What protection functions does the NXB-125G offer?

It provides overload, short-circuit, and isolation protection, ensuring system safety and preventing damage from electrical faults

What applications is the NXB-125G suitable for?

It’s designed for industrial power distribution, commercial installations, and heavy-duty machinery, where high breaking capacity and reliability are critical

How many poles are available for the NXB-125G?

The breaker comes in 1P, 2P, 3P, and 4P configurations, supporting both single-phase and three-phase systems

What’s the difference between the tripping curves?

B Curve: Protects resistive loads (e.g., lighting).

C Curve: Protects mixed loads (motors, outlets).

D Curve: Handles high inrush currents (transformers, motors).

OV Curve: Specialized high inrush curve (3P, 80 A only).

How does it handle temperature variations?

The NXB-125G maintains rated performance up to 30 °C, with derating applied above that (e.g., 93% at 40 °C, 74% at 70 °C).

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NXB-125G Miniature Circuit Breaker

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