Chint NXB63-2P/C1 miniature circuit breaker

Chint NXB63-2P/C1

Chint NXB63-2P/C1 is a miniature circuit breaker suitable for low-voltage power distribution systems. It belongs to the NXB series and is mainly used for overload and short-circuit protection. The following is a detailed analysis of its core information and application scenarios:

 I. Technical Parameters and Functional Features

1. Basic Parameters

- **Pole Number (2P)**: Controls both the live wire (L) and neutral wire (N) simultaneously. It is suitable for 220V single-phase circuits and can achieve double-pole protection.

- **Rated Current (C1)**: 1A, with a Type C tripping curve (instantaneous tripping when the current reaches 5-10 times the rated current). It is applicable to circuits sensitive to overload, such as lighting circuits and low-power equipment.

- **Breaking Capacity**: 10kA (6kA for some models), which can quickly cut off short-circuit current to avoid equipment damage and fire risks.

- **Rated Voltage**: 400V AC (for 2P models), compliant with GB/T 10963.1 and IEC 60898-1 standards, and has passed the CCC certification.

2. Design Features

- **Modular Structure**: Supports DIN rail mounting (TH35-7.5 type) and can be combined with accessories such as auxiliary contacts and over/under-voltage release to expand its functions.

- **Arc Extinguishing Technology**: Adopts a fast arc extinguishing design, featuring high breaking speed, which reduces arc damage to contacts.

- **Temperature Compensation**: Built-in bimetallic strip that automatically adjusts tripping characteristics according to ambient temperature, ensuring stable operation within the range of -35℃ to 70℃.

 II. Application Scenarios and Typical Configurations

1. Application Fields

- **Residential Power Distribution**: Used for protecting low-power equipment such as lighting circuits and small electrical appliances (e.g., set-top boxes, routers).

- **Commercial and Industrial Sectors**: Suitable for controlling power supply lines of signal circuits, sensors, or small precision instruments.

- **Special Scenarios**: Circuits that require strict restriction of overload current, such as laboratory equipment and medical instruments.

2. Installation Precautions

- **Wire Specification**: It is recommended to use copper wires with a cross-sectional area of 1-2.5mm². The terminal screws should be tightened (with a torque of 2.0N·m) to avoid overheating caused by poor contact.

- **Derating Use**: When multiple circuit breakers are installed side by side, derating is required. For example, when 7-9 units are installed in parallel, the rated current should be reduced to 0.76 times.

- **Environmental Requirements**: Avoid use in humid, high-temperature (＞70℃) or high-altitude (＞2000m) environments; otherwise, the rated parameters need to be adjusted.

 III. Compliance and Alternative Solutions

1. International Certifications

- This model has passed CCC (China Compulsory Certification) and CE certification, but UL certification is not clearly marked. If it needs to be used in North America, it is recommended to select Chint's NB1G-63 series (compliant with UL 60947-2 standard) or other models with UL certification.

 2. Recommended Alternative Models

- **NXB63-2P/C2**: With a rated current of 2A, it is suitable for LED lighting or small chargers with slightly higher power.

- **NXB63-2P/C6**: A 6A model that can be used for equipment such as smart sockets and small fans.

- **NB1G-63 Series**: Equipped with over-voltage protection function, suitable for areas with large voltage fluctuations.

 IV. User Feedback and Common Issues

1. Actual Performance

- Users generally report that Chint's NXB series circuit breakers are easy to install and highly reliable, and are widely used especially in home decoration.

- Low-current models (such as C1) perform stably in laboratories or with precision equipment, with no false tripping incidents.

2. Common Faults and Troubleshooting

- **Failure to Close**: Check if there is a short circuit at the load end, or replace the circuit breaker with the same specification.

- **Abnormally High Temperature**: Ensure the wires are connected firmly, or increase the cross-sectional area of the wires to reduce resistance.

- **Failure to Reset After Tripping**: It is necessary to investigate the cause of the fault (e.g., uneliminated short circuit) and contact a professional electrician for maintenance if necessary.

V. Purchase and Usage Recommendations

 1. Channel Selection

- It is recommended to purchase through WhatsApp: 0086-13811255435 to avoid counterfeit products.

- Pay attention to the anti-counterfeiting mark on the package; the authenticity can be verified through Chint's official website.

 2. Safety Tips

- Be sure to cut off the power supply before installation; live operation is strictly prohibited.

- Regularly check the status of the circuit breaker (e.g., press the test button monthly) to ensure the normal operation of the tripping function.

 Summary

Chint NXB63-2P/C1 is a cost-effective miniature circuit breaker. With its accurate overload protection, high reliability, and flexible expandability, it has become an ideal choice for low-voltage power distribution systems. In residential, commercial, and industrial scenarios, it can effectively ensure circuit safety while meeting the needs of equipment with different power levels. If it needs to be used in North America, it is recommended to give priority to models with UL certification (such as the NB1G-63 series) and strictly comply with local electrical regulations.