Why Choose the Chint NB1-63CH4P40 Miniature Circuit Breaker?
The Chint NB1-63CH4P40 is a high performance 4 pole miniature circuit breaker (MCB) engineered to provide dependable overload and short circuit protection in commercial, industrial and OEM electrical installations. As part of the proven Chint NB1-63H Series, this model offers a 10 kA breaking capacity, making it suitable for installations where higher prospective fault currents are present.
With a 40 A rated current and a C curve tripping characteristic, the NB1-63CH4P40 is ideal for protecting three phase distribution circuits, machinery, control panels and electrical equipment with moderate inrush currents. The four pole configuration provides simultaneous isolation of all conductors, improving operational safety during maintenance and fault conditions.
Designed for quick installation on a standard 35 mm DIN rail, this miniature circuit breaker combines compact dimensions, reliable operation and long mechanical life, making it an excellent choice for panel builders, electrical contractors and industrial maintenance engineers.
Key Advantages
- Compact 4 pole miniature circuit breaker.
- 40 A rated current for commercial and industrial power distribution.
- C curve tripping characteristic for mixed resistive and inductive loads.
- 10 kA breaking capacity for reliable fault protection.
- Provides dependable overload and short circuit protection.
- Quick DIN rail mounting for straightforward installation.
- Suitable for commercial, industrial and OEM applications.
Key Features
- Manufacturer: Chint
- Series: NB1-63H
- Model: NB1-63CH4P40
- 4 pole configuration.
- 40 A rated current.
- C curve trip characteristic (5 to 10 × In).
- 10 kA rated breaking capacity.
- Suitable for AC 50 / 60 Hz systems.
- DIN rail mounted modular design.
- Compatible with selected NB1 accessories.
Reliable Protection for Electrical Installations
The Chint NB1-63CH4P40 automatically disconnects electrical circuits whenever overload or short circuit conditions occur, helping to protect wiring, electrical equipment and connected machinery from damage while improving system safety and reliability.
Its C curve characteristic makes it particularly suitable for circuits supplying motors, socket outlets, control equipment and general power distribution where moderate inrush currents are expected. The four pole configuration enables complete isolation across three phase electrical systems whenever required.
Typical Applications
- Commercial electrical distribution boards.
- Industrial control panels.
- Three phase power distribution systems.
- Machine control equipment.
- OEM machinery.
- Building services installations.
- Electrical switchboards.
