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Chint NB1-63D4P03 MCB – 4P – D Curve – 3A – 6kA
Chint NB1-63D4P03 4 pole miniature circuit breaker with 3 A rated current, D curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£24.79
Why Choose the Chint NB1-63D4P03 Miniature Circuit Breaker?
The Chint NB1-63D4P03 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 4 pole D curve MCB features a 3 A rated current, making it suitable for low current three-phase and neutral circuits with high inrush characteristics, including transformers, motors, pumps, 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 NB1-63D4P03 is easy to install within distribution boards and electrical control panels. Its 4 pole design provides simultaneous isolation and protection across all three phases and neutral.
Key Advantages
- Compact 4 pole miniature circuit breaker.
- 3 A rated current for low current three-phase and neutral 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.
- 3 A rated current.
- D curve tripping characteristic.
- 4 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 and Neutral Circuits
Miniature circuit breakers such as the Chint NB1-63D4P03 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 twenty times the rated current, making it suitable for transformers, motors, pumps, discharge lighting and other equipment with high start-up currents.
Typical Applications
- Three-phase and neutral distribution boards.
- Industrial control panels.
- Motor circuits.
- Transformer protection.
- Pumps and discharge lighting.
- Electrical installations requiring 3 A four pole protection.
Technical Specifications
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| Current | 3 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63D4P03 | |
| Product type | Miniature circuit breaker / MCB | |
| Rated current | 3 A | |
| Number of poles | 4 pole | |
| Tripping characteristic | D curve | |
| Rated voltage | 400 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 6 kA | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Protection rating | IP20 | |
| Mounting type | 35 mm DIN rail | |
| Standards | IEC / EN 60898-1 |
Frequently Asked Questions
What is the Chint NB1-63D4P03 used for?
The Chint NB1-63D4P03 protects three-phase and neutral electrical circuits against overloads and short circuits, particularly circuits supplying motors, transformers and equipment with high inrush currents.
What current rating does this MCB have?
This miniature circuit breaker has a rated current of 3 A.
What does the D curve characteristic mean?
A D curve MCB trips between 10 and 20 times its rated current, making it suitable for inductive loads with high start-up currents.
What is the breaking capacity of this MCB?
The NB1-63D4P03 has a rated short-circuit breaking capacity of 6 kA.
How is the NB1-63D4P03 installed?
The device mounts onto a standard 35 mm DIN rail inside distribution boards and electrical control panels.
Trusted by Electrical Professionals Worldwide
Chint miniature circuit breakers are trusted by electricians, panel builders and maintenance engineers for dependable circuit protection across residential, commercial and industrial electrical installations.
