Why Choose the Chint NB1-63DH4P20 Miniature Circuit Breaker?
The Chint NB1-63DH4P20 is a high-performance 4 pole miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection in low-voltage electrical installations. As part of the trusted Chint NB1 Series, this MCB is suitable for industrial, commercial and OEM applications where reliable circuit protection and safe isolation are essential.
Featuring a 20 A rated current, D curve tripping characteristic and a 10 kA breaking capacity, the NB1-63DH4P20 is particularly suited to circuits supplying equipment with high inrush currents, including transformers, motors and inductive loads. The four-pole configuration provides simultaneous protection and switching of all live conductors within three-phase electrical systems.
Its compact DIN rail mounted design allows quick installation into distribution boards and control panels, while robust construction and compliance with recognised international standards ensure long-term reliability in demanding electrical environments.
Key Advantages
- Compact 4 pole miniature circuit breaker for three-phase installations.
- 20 A rated current for dependable circuit protection.
- D curve ideal for circuits with high inrush current.
- 10 kA breaking capacity for enhanced fault protection.
- Provides overload, short-circuit protection and safe circuit isolation.
- Simple DIN rail installation for control panels and distribution boards.
Key Features
- Chint NB1 Series miniature circuit breaker.
- 4 pole configuration.
- 20 A rated current.
- D curve tripping characteristic.
- 10 kA rated breaking capacity.
- Suitable for AC 50 / 60 Hz electrical systems.
- DIN rail mounting.
- Designed for protection, switching and circuit isolation.
Reliable Protection for Electrical Distribution Systems
Miniature circuit breakers such as the Chint NB1-63DH4P20 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect wiring, electrical equipment and connected machinery while improving installation safety and reducing the risk of equipment damage.
The D curve characteristic is intended for applications with higher inrush currents, making this MCB well suited for transformer circuits, industrial machinery, motors and other inductive loads where standard B or C curve devices may nuisance trip.
Typical Applications
- Industrial control panels.
- Three-phase electrical distribution boards.
- Motor control circuits.
- Transformer protection.
- Commercial electrical installations.
- OEM machinery and automation systems.
