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Chint NB1-63D2P03 MCB – 2P – D Curve – 3A – 6kA
Chint NB1-63D2P03 2 pole miniature circuit breaker with 3 A rated current, D curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£9.18
Why Choose the Chint NB1-63D2P03 Miniature Circuit Breaker?
The Chint NB1-63D2P03 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 2 pole D curve MCB features a 3 A rated current, making it suitable for specialised control circuits, transformers, solenoids, magnetic devices and equipment with high inrush currents. The D curve tripping characteristic is designed for highly inductive loads that can generate substantial start-up currents.
With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63D2P03 is easy to install within consumer units, distribution boards and electrical control panels. Its 2 pole design enables simultaneous disconnection of both conductors for improved circuit isolation.
Key Advantages
- Compact 2 pole miniature circuit breaker.
- 3 A rated current for specialised low current 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.
- 2 pole configuration.
- 6 kA breaking capacity.
- 230 / 400 V AC rated voltage.
- DIN rail mounting.
- Suitable for overload, short-circuit protection and circuit isolation.
Reliable Protection for High Inrush Current Circuits
Miniature circuit breakers such as the Chint NB1-63D2P03 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 makes this MCB suitable for circuits with high inrush currents, including transformers, magnetic devices, solenoids, discharge lighting and other inductive loads. Its 2 pole construction provides simultaneous switching and protection across both conductors.
Typical Applications
- Industrial control panels.
- Transformer protection.
- Magnetic device circuits.
- Control and auxiliary circuits.
- High inrush current equipment.
- Electrical installations requiring 3 A protection.
Technical Specifications
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| Current | 3 A | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63D2P03 | |
| Product type | Miniature circuit breaker / MCB | |
| Rated current | 3 A | |
| Number of poles | 2 pole | |
| Tripping characteristic | D curve | |
| Rated voltage | 230 / 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 NB1-63D2P03 used for?
The Chint NB1-63D2P03 protects electrical circuits against overloads and short circuits, particularly where high inrush currents are present.
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 is designed for circuits with high inrush currents, such as transformers, magnetic devices, solenoids and similar inductive loads.
What is the breaking capacity of this MCB?
The NB1-63D2P03 has a rated short-circuit breaking capacity of 6 kA.
How is the NB1-63D2P03 installed?
The device mounts onto a standard 35 mm DIN rail inside consumer units, distribution boards and electrical 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.
