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 NBH8-40-B10 MCB – 1P+N – B Curve – 10A – 4.5kA
Chint NBH8-40-B10 1P+N B curve 10 A miniature circuit breaker designed for overload and short-circuit protection in low-voltage electrical installations.
£7.50
Why Choose the Chint NBH8-40-B10 Miniature Circuit Breaker?
The Chint NBH8-40-B10 is a compact and dependable 1P+N miniature circuit breaker designed to provide reliable overload and short-circuit protection in low-voltage electrical installations. As part of the trusted Chint NBH8 series, it is suitable for residential, commercial and light industrial applications where safe circuit protection and reliable isolation are essential.
Its slim modular design makes it ideal for installation within consumer units, distribution boards and electrical control panels where space is limited. The integrated contact position indicator provides a clear visual indication of breaker status, while the fast clip DIN rail mounting system enables quick installation and maintenance. The NBH8 series complies with IEC/EN 60898-1 and is designed for long service life and dependable performance.
With a rated current of 10 A, a B curve tripping characteristic and a 1P+N configuration, the NBH8-40-B10 is ideal for protecting lighting circuits, socket outlets, auxiliary supplies and general-purpose electrical circuits requiring dependable overload and short-circuit protection.
Key Advantages
- Compact 10 A miniature circuit breaker for reliable circuit protection.
- 1P+N configuration with protected live and switched neutral.
- B curve tripping characteristic suitable for resistive loads and low inrush current circuits.
- Provides dependable overload and short-circuit protection.
- Suitable for switching and electrical isolation.
- Quick installation using standard 35 mm DIN rail mounting.
Key Features
- Chint NBH8 miniature circuit breaker series.
- 10 A rated current.
- B curve tripping characteristic.
- 1P+N pole configuration.
- Designed for overload and short-circuit protection.
- Contact position indicator for clear operating status.
- Compact modular housing for distribution boards.
- 35 mm DIN rail mounting with fast clip device.
Reliable Protection for Everyday Electrical Circuits
The Chint NBH8-40-B10 automatically disconnects the electrical supply during overload or short-circuit conditions, helping to protect wiring, electrical equipment and connected devices from damage. Its B curve characteristic trips between 3 and 5 times the rated current, making it ideal for general-purpose electrical circuits with low inrush current.
The 1P+N configuration protects the live conductor while switching the neutral conductor, providing safe isolation for single-phase electrical systems in residential, commercial and light industrial environments.
Typical Applications
- Consumer units and distribution boards.
- Residential electrical installations.
- Commercial lighting circuits.
- Socket outlet circuits.
- Control panels and auxiliary supplies.
- General-purpose single-phase electrical systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Single Phase | |
|---|---|---|
| Current | 10 A | |
| Poles | 1-pole + N | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 4.5 kA | |
| Manufacturer | Chint | |
| Series | NBH8 | |
| Model | NBH8-40-B10 | |
| Product type | Miniature circuit breaker | |
| Rated current | 10 A | |
| Number of poles | 1P+N | |
| Tripping curve | B curve | |
| Rated voltage | 230 / 240 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated insulation voltage | 500 V | |
| Rated impulse withstand voltage | 4 kV | |
| Breaking capacity | 4.5 kA or 6 kA | |
| Energy limiting class | Class 3 | |
| Protection rating | IP20 | |
| Standard | IEC / EN 60898-1 | |
| Mounting type | 35 mm DIN rail | |
| Terminal connection | Cable or pin-type busbar | |
| Terminal capacity | 16 mm² cable / 10 mm² busbar |
Frequently Asked Questions
What is the Chint NBH8-40-B10 used for?
The NBH8-40-B10 protects low-voltage electrical circuits against overloads and short circuits while providing reliable switching and isolation.
What current rating does this MCB have?
This model has a rated current of 10 A.
What does the B curve characteristic mean?
A B curve MCB typically trips between 3 and 5 times its rated current, making it suitable for resistive loads and circuits with low inrush current.
How many poles does the NBH8-40-B10 have?
The NBH8-40-B10 features a 1P+N configuration with one protected pole and a switched neutral.
Where is this circuit breaker typically installed?
It is installed on a standard 35 mm DIN rail inside consumer units, distribution boards and electrical control panels.
Trusted by Electrical Professionals Worldwide
Chint NBH8 miniature circuit breakers are trusted by electricians, panel builders and maintenance engineers for dependable circuit protection, compact installation and long-term reliability across a wide range of electrical applications.
