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Chint NB1-63B2P50 MCB – 2P – B Curve – 50A – 6kA
Chint NB1-63B2P50 2 pole miniature circuit breaker with 50 A rated current, B curve tripping characteristic and 6 kA breaking capacity for overload and short-circuit protection.
£8.34
Why Choose the Chint NB1-63B2P50 Miniature Circuit Breaker?
The Chint NB1-63B2P50 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 B curve MCB features a 50 A rated current, making it suitable for higher current radial circuits, distribution boards, sub-main circuits and other low inrush current applications. The B curve tripping characteristic provides rapid protection for resistive loads and general-purpose electrical circuits.
With a rated short-circuit breaking capacity of 6 kA and a standard 35 mm DIN rail mounting format, the NB1-63B2P50 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.
- 50 A rated current for higher current circuits.
- B curve trip characteristic for low 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.
- 50 A rated current.
- B 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 Low Inrush Current Circuits
Miniature circuit breakers such as the Chint NB1-63B2P50 automatically disconnect electrical circuits when overloads or short circuits occur. This helps protect wiring, connected equipment and electrical installations from damage caused by excessive current.
The B curve characteristic makes this MCB suitable for sub-main circuits, distribution boards, socket outlet circuits and other general-purpose applications where high start-up currents are not expected. Its 2 pole construction provides simultaneous switching and protection across both conductors.
Typical Applications
- Residential consumer units.
- Commercial distribution boards.
- Sub-main circuits.
- Higher current radial circuits.
- General power circuits.
- Electrical installations requiring 50 A protection.
Technical Specifications
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| Current | 50 A | |
|---|---|---|
| Poles | 2-pole | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | Chint | |
| Series | NB1-63 | |
| Model | NB1-63B2P50 | |
| Product type | Miniature circuit breaker / MCB | |
| Rated current | 50 A | |
| Number of poles | 2 pole | |
| Tripping characteristic | B 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 NB1-63B2P50 used for?
The Chint NB1-63B2P50 protects low voltage 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 50 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 NB1-63B2P50 has a rated short-circuit breaking capacity of 6 kA.
How is the NB1-63B2P50 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.
