Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
Chint NB1-63B1P25 MCB – 1P – B Curve – 25A – 6kA
Chint NB1-63B1P25 1 pole miniature circuit breaker with 25 A rated current, B curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£2.92
Why Choose the Chint NB1-63B1P25 Miniature Circuit Breaker?
The Chint NB1-63B1P25 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 installations.
This 1 pole B curve MCB features a 25 A rated current, making it suitable for radial circuits, socket outlet circuits, lighting circuits and general-purpose electrical applications. The B curve tripping characteristic is designed for circuits with low inrush currents.
With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63B1P25 is easy to install within consumer units, distribution boards and electrical control panels. Its compact modular construction supports neat installation and dependable long-term performance.
Key Advantages
- Compact 1 pole miniature circuit breaker.
- 25 A rated current for general-purpose circuits.
- B curve trip characteristic for circuits with low inrush current.
- 6 kA short-circuit breaking capacity.
- Reliable overload and short-circuit protection.
- Quick DIN rail installation in distribution boards and consumer units.
Key Features
- Chint NB1-63 series MCB.
- 25 A rated current.
- B curve tripping characteristic.
- 1 pole configuration.
- 6 kA breaking capacity.
- 230 V AC rated voltage.
- DIN rail mounting.
- Suitable for overload and short-circuit protection.
Reliable Protection for Final Circuits
Miniature circuit breakers such as the Chint NB1-63B1P25 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect cables, connected equipment and electrical installations from damage caused by excessive current.
The B curve characteristic makes this MCB suitable for circuits with low inrush currents, including socket outlet circuits, radial circuits, lighting circuits and general-purpose electrical loads. Its modular DIN rail design allows straightforward integration into new or existing distribution systems.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Socket outlet circuits.
- Radial final circuits.
- Lighting and small power circuits.
- General electrical installations requiring 25 A protection.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 25 A | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63B1P25 | |
| Product type | Miniature circuit breaker / MCB | |
| Rated current | 25 A | |
| Number of poles | 1 pole | |
| Tripping characteristic | B curve | |
| Rated voltage | 230 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 NB1-63B1P25 used for?
The Chint NB1-63B1P25 is used to protect electrical circuits against overloads and short circuits in residential, commercial and light industrial installations.
What current rating does this MCB have?
This miniature circuit breaker has a rated current of 25 A.
What does the B curve characteristic mean?
A B curve MCB trips between 3 and 5 times its rated current, making it suitable for circuits with low inrush currents.
What is the breaking capacity of this MCB?
The NB1-63B1P25 has a rated short-circuit breaking capacity of 6 kA.
How is the NB1-63B1P25 installed?
The device is designed for installation 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.
