Chint CJX2-5011 AC contactor

Chint CJX2-5011 is a high-performance AC contactor belonging to the CJX2 series. It is mainly used for motor control and circuit on-off management in industrial and commercial fields. The following is a detailed analysis of its core information:

I. Product Type and Core Parameters

1. Basic Attributes

- **Type**: AC contactor, suitable for AC 50Hz/60Hz circuits.

- **Rated Current**: 50A (under AC-3 application category at 380V), capable of controlling motors with a maximum power of 22kW (at 380V).

- **Auxiliary Contacts**: 1 set of Normally Open (NO) + 1 set of Normally Closed (NC). The suffix "11" in the model indicates this configuration.

- **Coil Voltage**: Supports multiple voltage options including 24V, 36V, 48V, 110V, 127V, 220V, and 380V, adapting to the needs of different control circuits.

2. Technical Specifications

- **Rated Insulation Voltage**: 690V, enabling stable operation within a wide voltage range of 220V to 690V.

- **Mechanical Life**: Up to 10 million operations; electrical life (AC-3) is 600,000 operations, suitable for scenarios requiring frequent operations.

- **Operating Frequency**: 1,200 operations per hour, meeting the rapid start-stop requirements of high-load equipment.

- **Certifications**: Certified by China's CCC and the United States' UL, complying with international standards such as IEC/EN 60947-4-1 and GB/T 14048.4.

 II. Application Scenarios and Function Expansion

1. Typical Applications

- **Motor Control**: Used for frequent starting and stopping of equipment such as fans, water pumps, and compressors, supporting remote control.

- **Power Distribution Systems**: Realizes remote on-off control and protection of circuits, improving power supply reliability.

- **Mechanical Equipment**: Adaptable to electrical control systems of machine tools, cranes, conveyors, etc.

- **Building Electrical Systems**: Capable of controlling the power supply of building automation equipment such as lighting and air conditioners.

2. Modular Design

- **Expansion Functions**: Supports the installation of accessories such as auxiliary contact blocks, air time delay heads, and mechanical interlocks, and can be flexibly expanded into time-delay contactors, reversing contactors, or star-delta starters.

- **Overload Protection**: Can be directly plugged with NR2 series thermal overload relays (e.g., NR2-93) to form an electromagnetic starter, providing overcurrent protection.

 III. Reliability and Design Advantages

1. Materials and Technology

- Adopts high-quality silver alloy contacts and high-temperature resistant plastic enclosures, reducing arc erosion and extending service life.

- Improved screw technology enhances installation stability. Products with old and new appearances may coexist, but their functions are completely consistent.

2. Performance

- **Low Noise**: Optimized electromagnetic system design ensures that the noise during operation is lower than the industry average level.

- **Anti-Interference**: The coil has a built-in short-circuit ring, reducing vibration and noise caused by AC magnetic fields.

IV. Price and Purchase Recommendations

1. Market Price

- **US Market**: The quoted price on international platforms is approximately 14-16 USD per unit (for bulk purchases), supporting voltage options such as 220V and 380V.

2. Purchase Channels

- **International**: Purchases can be made via cross-border WhatsApp: 0086-13811255435. It is necessary to confirm whether UL certification is included and the local logistics timeliness.

 V. Alternative Models and Compatibility

1. Upgraded Alternatives

- **Chint NXC Series**: For example, NXC-50, which is an upgraded version of CJX2. It is compatible with CJX2 in terms of installation dimensions and electrical parameters, and supports more efficient energy management.

- **Schneider LC1-D Series**: The model LC1-D5011 can be used as a direct alternative, with performance parameters highly consistent with those of CJX2-5011.

2. Compatibility Notes

- When replacing, it is necessary to confirm that the coil voltage, contact configuration, and installation method are completely matched. For some models, adjustments to auxiliary accessories may be required.

 VI. User Feedback and Usage Recommendations

1. Practical Reviews

- Users report that it has strong durability, a low failure rate during long-term high-load operation, and stable performance especially in industrial environments.

- Some users mention that it is easy to install, but it is recommended to clean the contacts regularly to maintain optimal conductivity.

2. Maintenance Tips

- **Cleaning**: Inspect the contact surfaces quarterly to prevent dust or oxide layers from affecting conduction performance.

- **Fastening**: Regularly check the screws of terminal blocks to prevent loosening caused by vibration.

VII. Notes

- **Voltage Matching**: Be sure to select the correct coil voltage according to the actual control circuit to avoid coil burnout due to voltage mismatch.

- **Environmental Requirements**: The operating temperature range is -5℃ to +40℃, and the humidity should not exceed 85%. It should not be used in flammable and explosive environments.

With its high reliability, wide voltage compatibility, and modular design, Chint CJX2-5011 has become one of the mainstream choices in the industrial control field. Whether for supporting new equipment or upgrading old systems, it can provide a stable circuit management solution.