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.

Need Support From Us?

Blog

Find expert perspectives on the trends and technologies driving your business.

View Now

Download Center

Download new and previously released documents including product document, solutions, cases, coporate report.

View Now

Reach out to us to receive more information, technical support, assistance with complaints and more.

Collapsed

Expand

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.

Please enter keywords to search

Choose your country & Language

Asia Pacific

Middle East & Africa

Europe

Latin America

North America

Choose your country & Language

Please enter keywords to search

NB8 -63H Miniature Circuit Breaker

Product Information

Need Support From Us?

FAQs

NB8 -63H Miniature Circuit Breaker

Product Information

Related Products

Need Support From Us?

FAQs