Name: NB8 -63H Miniature Circuit Breaker
Brand: Chint

NB8 -63H Miniature Circuit Breaker

The NB8-63H Miniature Circuit Breaker (MCB) from CHINT provides reliable protection for residential, commercial, and industrial electrical systems. It safeguards circuits against short-circuits and overloads, ensuring safe operation and isolation. Designed for AC 230/400V, 50Hz networks, the NB8-63H offers B, C, and D tripping curves for various load types and a breaking capacity of 10kA. With 1–63A rated current range, up to 4 poles, and 20,000 mechanical operations, it delivers high performance, durability, and IEC 60898-1 compliance.

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FAQs

What is the main function of the NB8-63H MCB?

The NB8-63H protects electrical circuits from overload and short-circuit faults, ensuring safe operation and easy manual switching or isolation when needed.

Where is the NB8-63H typically used?

It’s suitable for residential buildings, commercial facilities, and industrial distribution panels where reliable and compact circuit protection is essential.

What tripping curve should I choose?

B Curve: For longer cable runs or low inrush systems (lighting, domestic circuits).

C Curve: For general applications and inductive loads (motors, HVAC).

D Curve: For high inrush loads (transformers, welding equipment).

Can it be used with accessories?

Yes, the NB8-63H is compatible with S9, V9, XF9, XF9J, OVT-1, and OUVT-1 accessories, expanding its control and protection capabilities.

What makes the NB8-63H reliable in harsh conditions?

It offers wide operating temperature tolerance (−35°C to +70°C), IP20 protection, and 10kA breaking capacity, ensuring safety and performance even in challenging environments.

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NB8 -63H Miniature Circuit Breaker

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NB8 -63H Miniature Circuit Breaker

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