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nxb-63-1p-b40 chint 40a b curve 1p 6ka miniture circuit breaker
Chint NXB-63-1P-B40 miniature circuit breaker, a 40 A B curve 1 pole 6 kA MCB for overload and short-circuit protection in residential, commercial and light industrial electrical installations.
£2.05
Why Choose the Chint NXB-63-1P-B40 Miniature Circuit Breaker?
The Chint NXB-63-1P-B40 is a reliable single pole miniature circuit breaker (MCB) designed to protect electrical circuits against overload and short-circuit faults. As part of the Chint NXB-63 MCB series, it provides dependable circuit protection for residential, commercial and light industrial low voltage electrical installations.
Featuring a 40 A rated current and a B curve thermal-magnetic trip characteristic, this MCB is suitable for circuits with relatively low inrush currents, including general power distribution, resistive loads and selected higher-rated final circuit applications. Its compact modular format enables quick installation in compatible DIN rail consumer units and distribution boards.
With a 6 kA short-circuit breaking capacity, 230 V AC single-phase rating and compliance with IEC/EN 60898-1, the NXB-63-1P-B40 delivers practical and dependable protection while supporting safe isolation in modern electrical systems.
Key Advantages
- Reliable 40 A single pole miniature circuit breaker.
- B curve tripping characteristic for low inrush current circuits.
- 6 kA breaking capacity for dependable fault protection.
- Provides overload protection, short-circuit protection and positive isolation.
- Compact DIN rail mounting for straightforward installation.
- Suitable for domestic, commercial and light industrial circuit protection.
Key Features
- Chint NXB-63 miniature circuit breaker series.
- 1 pole configuration.
- 40 A rated current.
- B curve trip characteristic.
- 6 kA rated short-circuit breaking capacity.
- 230 V AC rated voltage.
- Thermal-magnetic release for overload and short-circuit protection.
- Compatible with standard 35 mm DIN rail distribution systems.
Reliable Protection for Low Voltage Circuits
Miniature circuit breakers such as the Chint NXB-63-1P-B40 automatically disconnect electrical circuits when overload or short-circuit faults occur. This helps protect cables, connected equipment and electrical installations from damage caused by excessive current.
The B curve characteristic makes this breaker suitable for circuits with relatively low starting currents. Its compact modular construction and DIN rail compatibility make it a practical option for electricians working on consumer units, distribution boards and electrical control panels.
Typical Applications
- Residential power distribution.
- Commercial electrical distribution boards.
- Consumer units and final circuit protection.
- Resistive load and general power circuits.
- Control panels and auxiliary distribution.
- Domestic, commercial and light industrial installations.
Technical Specifications
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| Current | 40 A | |
|---|---|---|
| Phase | Single Phase | |
| Poles | 1-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NXB-63 | |
| Model | NXB-63-1P-B40 | |
| Product type | Miniature circuit breaker | |
| Number of poles | 1 pole | |
| Rated current | 40 A | |
| Trip curve | B curve | |
| Rated voltage | 230 V AC | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit breaking capacity | 6 kA | |
| Rated impulse withstand voltage | 4 kV | |
| Mechanical life | 20,000 operations | |
| Electrical life | 10,000 operations | |
| Standard | IEC / EN 60898-1 | |
| Mounting type | 35 mm DIN rail | |
| Protection functions | Overload protection, short-circuit protection and isolation |
Frequently Asked Questions
What is the Chint NXB-63-1P-B40 used for?
The Chint NXB-63-1P-B40 is used to protect single-phase electrical circuits against overload and short-circuit faults in consumer units, distribution boards and electrical panels.
What current rating does this MCB have?
The NXB-63-1P-B40 has a rated current of 40 A.
What does B curve mean on this breaker?
A B curve MCB is designed for circuits with relatively low inrush currents, making it suitable for general-purpose circuits where high starting currents are not expected.
What is the breaking capacity of the NXB-63-1P-B40?
The breaker has a rated short-circuit breaking capacity of 6 kA.
How is this MCB installed?
The Chint NXB-63-1P-B40 is designed for installation on a standard 35 mm DIN rail inside compatible consumer units, distribution boards and electrical panels.
Trusted by Electrical Installers Worldwide
Chint NXB-63 miniature circuit breakers are trusted by electricians and contractors for dependable overload protection, short-circuit protection and safe circuit isolation across modern low voltage electrical installations.
