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Chint NBH8-40-B01 MCB – 1P+N – B Curve – 1A – 4.5kA
Chint NBH8-40-B01 1P+N B curve 1 A miniature circuit breaker designed for overload and short-circuit protection in low-voltage electrical installations.
£7.50
Why Choose the Chint NBH8-40-B01 Miniature Circuit Breaker?
The Chint NBH8-40-B01 is a compact and reliable 1P+N miniature circuit breaker designed to provide overload and short-circuit protection in low-voltage electrical installations. As part of the Chint NBH8 series, it is suitable for residential, commercial and light industrial distribution systems where safe circuit protection and isolation are required.
This MCB combines a slim modular design with dependable protection performance, making it ideal for use in consumer units, distribution boards and electrical control panels. Its integrated contact position indicator supports clear status visibility, while the DIN rail mounting format enables fast and straightforward installation.
With a rated current of 1 A, a B curve tripping characteristic and a 1P+N configuration, the NBH8-40-B01 is well suited for low-current circuits, control wiring and resistive loads where reliable protection and compact installation are important.
Key Advantages
- Compact 1 A miniature circuit breaker for low-current circuit protection.
- 1P+N configuration for protected live and switched neutral arrangements.
- B curve trip characteristic suitable for resistive loads and longer cable runs.
- Provides overload and short-circuit protection.
- Suitable for switching and isolation duties.
- Quick installation using standard 35 mm DIN rail mounting.
Key Features
- Chint NBH8 miniature circuit breaker series.
- 1 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 design for distribution boards.
- 35 mm DIN rail mounting with fast clip device.
Reliable Protection for Low-Current Circuits
The Chint NBH8-40-B01 automatically disconnects the circuit when overload or short-circuit conditions occur, helping to protect wiring, equipment and connected devices from electrical damage. Its B curve characteristic is designed to trip between 3 and 5 times the rated current, making it suitable for resistive circuits and applications with low inrush current.
The 1P+N configuration allows the live conductor to be protected while the neutral conductor is switched, supporting safe isolation in compact single-phase distribution systems.
Typical Applications
- Consumer units and distribution boards.
- Residential electrical installations.
- Commercial lighting and control circuits.
- Low-current auxiliary circuits.
- Control panels and automation enclosures.
- Switching and isolation of single-phase circuits.
Technical Specifications
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| Phase | Single Phase | |
|---|---|---|
| Current | 1 A | |
| Poles | 1-pole + N | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 4.5 kA | |
| Manufacturer | Chint | |
| Series | NBH8 | |
| Model | NBH8-40-B01 | |
| Product type | Miniature circuit breaker | |
| Rated current | 1 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 depending on version | |
| 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-B01 used for?
The NBH8-40-B01 is used to protect low-current electrical circuits against overloads and short circuits while providing switching and isolation.
What current rating does this MCB have?
This model has a rated current of 1 A.
What does B curve mean on this circuit breaker?
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-B01 have?
The NBH8-40-B01 has a 1P+N configuration, with one protected pole and a switched neutral.
Where is this circuit breaker typically installed?
It is typically installed on a standard 35 mm DIN rail inside consumer units, distribution boards or electrical control panels.
Trusted by Electrical Professionals Worldwide
Chint NBH8 miniature circuit breakers are trusted by electricians, panel builders and maintenance engineers for compact circuit protection, reliable switching and dependable performance in low-voltage electrical installations.
