Chint NXB-63-1P-B50 50A B curve 1 pole miniature circuit breaker with 6kA breaking capacity for overload and short-circuit protection in low voltage electrical installations.
£4.80
The Chint NXB-63-1P-B50 is a dependable single pole miniature circuit breaker (MCB) designed to provide reliable protection against overloads and short-circuit faults in low voltage electrical installations. As part of the proven Chint NXB-63 MCB series, it is suitable for residential, commercial and light industrial electrical distribution systems.
Featuring a 50 A rated current and a B curve thermal-magnetic trip characteristic, this MCB is designed for circuits with relatively low inrush currents, making it suitable for general power distribution, resistive loads and higher rated final circuits. Its compact modular design enables straightforward installation into compatible DIN rail consumer units, distribution boards and control panels.
With a 6 kA rated short-circuit breaking capacity, 230 V AC operating voltage and compliance with IEC/EN 60898-1, the NXB-63-1P-B50 provides dependable protection while helping maintain the safety and reliability of modern electrical installations.
Miniature circuit breakers such as the Chint NXB-63-1P-B50 automatically disconnect electrical circuits when overload or short-circuit faults occur. This helps protect wiring, connected equipment and electrical installations from damage caused by excessive current while providing safe circuit isolation when required.
Its B curve characteristic makes this breaker suitable for circuits with relatively low starting currents. The compact modular construction allows fast installation in consumer units, distribution boards and electrical control panels, making it a practical choice for new installations, maintenance and upgrades.
| Current | 50 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | Chint |
| Series | NXB-63 |
| Model | NXB-63-1P-B50 |
| Product type | Miniature circuit breaker |
| Number of poles | 1 pole |
| Rated current | 50 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 |
The Chint NXB-63-1P-B50 protects single-phase electrical circuits against overload and short-circuit faults in consumer units, distribution boards and electrical panels.
This miniature circuit breaker has a rated current of 50 A.
A B curve MCB is intended for circuits with relatively low inrush currents, making it suitable for general-purpose electrical circuits where high starting currents are not expected.
The NXB-63-1P-B50 has a rated short-circuit breaking capacity of 6 kA.
The breaker is designed for installation on a standard 35 mm DIN rail inside compatible consumer units and distribution boards.
Chint NXB-63 miniature circuit breakers are trusted by electricians and contractors for dependable overload protection, reliable fault interruption and long service life across residential, commercial and industrial electrical installations.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...