Name: NXB-63H Miniature Circuit Breaker
Brand: Chint

NXB-63H Miniature Circuit Breaker

The NXB-63H Miniature Circuit Breaker (MCB) from CHINT is designed for overload and short-circuit protection in residential, commercial, and industrial electrical systems. Built in compliance with IEC/EN 60898-1, it delivers a high breaking capacity of 10kA, ensuring dependable performance and circuit isolation. With B, C, and D tripping curves, and rated currents from 1A to 63A, the NXB-63H provides reliable protection and long service life, making it ideal for modern low-voltage power distribution applications.

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FAQs

What makes the NXB-63H different from other miniature circuit breakers?

The NXB-63H offers a 10kA breaking capacity, providing superior protection for systems with higher fault levels compared to standard MCBs rated at 4.5–6kA.

What types of tripping characteristics are available?

It supports B, C, and D curves, suitable for a range of load types — from resistive (lighting) to inductive or motor loads with high inrush currents.

What applications is the NXB-63H suitable for?

Ideal for residential, commercial, and industrial distribution systems, including control panels, building automation, and equipment protection circuits.

How is the breaker affected by ambient temperature?

The NBX-63H includes a temperature derating curve (see Table 2, page 9), which adjusts rated current according to operating temperature — ensuring reliable performance from –35°C to +70°C.

Which accessories can be used with this model?

It is compatible with auxiliary and alarm contacts (AX-X1, AL-X1) and shunt or undervoltage trip units (SHT-X1, OVT-X1, UVT-X1, OUVT-X1) for enhanced protection and remote monitoring.

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NXB-63H Miniature Circuit Breaker

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