Why Choose the Chint NB1-63D3P20 Miniature Circuit Breaker?
The Chint NB1-63D3P20 is a compact and dependable miniature circuit breaker (MCB) designed to protect low voltage electrical circuits against overloads and short circuits. As part of the Chint NB1-63 series, it provides reliable circuit protection for residential, commercial and light industrial electrical installations.
This 3 pole D curve MCB features a 20 A rated current, making it suitable for three-phase circuits with high inrush characteristics, including transformers, motors, pumps, compressors, discharge lighting and other inductive equipment. The D curve tripping characteristic helps reduce nuisance tripping during equipment start-up while maintaining dependable protection.
With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63D3P20 is easy to install within distribution boards and electrical control panels. Its 3 pole construction provides simultaneous isolation and protection across all three phases.
Key Advantages
- Compact 3 pole miniature circuit breaker.
- 20 A rated current for three-phase circuits.
- D curve trip characteristic for high inrush current loads.
- 6 kA short-circuit breaking capacity.
- Reliable overload and short-circuit protection.
- DIN rail installation in distribution boards and control panels.
Key Features
- Chint NB1-63 series MCB.
- 20 A rated current.
- D curve tripping characteristic.
- 3 pole configuration.
- 6 kA breaking capacity.
- 400 V AC rated voltage.
- 35 mm DIN rail mounting.
- Suitable for overload, short-circuit protection and circuit isolation.
Reliable Protection for High Inrush Three-Phase Circuits
Miniature circuit breakers such as the Chint NB1-63D3P20 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect wiring, connected equipment and electrical installations from excessive current and fault conditions.
The D curve characteristic trips between ten and fourteen times the rated current, making it suitable for transformers, motors, pumps, compressors, discharge lighting and other equipment with high start-up currents.
Typical Applications
- Three-phase distribution boards.
- Industrial control panels.
- Motor circuits.
- Transformer protection.
- Pumps, compressors and discharge lighting.
- Electrical installations requiring 20 A three-phase protection.
