Chint Contactor CJX2-5011 is a three-phase AC contactor specifically designed for industrial control. It is suitable for frequent starting and stopping of motors, power distribution systems, and automated equipment. The following is a summary of its core information:
- Technical Parameters and Performance
- Electrical Specifications
Rated Current: 50A (under AC-3 utilization category and 380V voltage), which can meet the control requirements of motors ranging from 7.5kW to 15kW.
Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC), supporting interlocking or signal feedback circuits.
Coil Voltage: Available in multiple options including 24V, 36V, 110V, 220V, and 380V, compatible with different control power supplies.
Pole Number: 3 poles (3P), suitable for three-phase circuits.
Insulation Voltage: 660V (per IEC standard) or 690V (per GB standard), meeting the requirements of high-voltage environments.
- Mechanical and Environmental Characteristics
Mechanical Life: Over 6 million operations; electrical life can reach 1.2 million operations (for AC-3), suitable for high-frequency operation scenarios.
Mounting Method: Supports 35mm DIN rail or screw fixing, compatible with industrial standardized installation.
Operating Temperature: -5℃ to +40℃, adaptable to a wide temperature range.
Arc Extinguishing System: Adopts a double-break structure and arc-extinguishing grids, with an arc distance of less than 10mm to ensure safety.
- Certification and Compliance
– Certified to GB14048.4 (China) and IEC60947-4-1 (international) standards; some models have obtained CE certification.
– Complies with the requirements of pollution degree 3 and installation category Ⅲ for industrial environments.
- Application Scenarios
- Motor Control
It can directly control the starting and stopping of 7.5kW to 15kW motors, and supports complex logic such as star-delta reduced-voltage starting and reversible control. Typical applications include fans, water pumps, compressors, and other equipment.
- Industrial Automation
As an executive component of PLC systems, it is used for sequential control of production line equipment, starting and stopping of conveyors, etc., and is compatible with 24V~415V wide-voltage control signals.
- Power Distribution and Energy Sector
It controls air conditioning and lighting systems in building electrical systems, and realizes circuit on-off in new energy scenarios (such as solar inverters).
- Replacement and Upgrade
It can directly replace Schneider LC1-D50 series contactors, or be upgraded to Chint’s new-generation NXC series (e.g., NXC-50). The latter has a mechanical life increased to 55 million operations and better arc-extinguishing performance.
III. Price and Purchase Channels
- Market Price
International Market: Approximately USD 14.46 per unit (under FCA terms). The specific price fluctuates according to the voltage model and purchase quantity.
- Installation and Usage Guidelines
- Wiring Specifications
Main Circuit: Connect L1/L2/L3 to the three-phase power supply, and T1/T2/T3 to the load (e.g., motor). It is recommended to use 16mm² copper core wires.
Control Circuit: Connect the coil terminals A1/A2 to the control voltage. The auxiliary NO contact is used for self-locking, and the NC contact is used for interlocking (see the sample wiring diagram for details).
Grounding: The metal housing must be reliably grounded to avoid electromagnetic interference.
- Commissioning and Maintenance
– Before installation, check whether the coil voltage matches, and manually operate the contactor to confirm that the contacts move flexibly.
– Monitor the temperature rise of the contacts during operation. If the temperature exceeds 70℃, it is necessary to check for overload or poor contact.
– Regularly clean the arc-extinguishing chamber and replace worn silver contacts (it is recommended to check once every 500,000 operations).
- Alternative Models and Upgrade Recommendations
- NXC Series Contactors
Advantages: Modular design, support for more contact combinations (e.g., 2NO+2NC), arc distance shortened to within 10mm, and adaptation to the digital needs of smart factories.
Compatibility: NXC-50 can directly replace CJX2-5011 without changing the installation holes or circuit layout.
- Alternatives from Other Brands
– Schneider LC1-D50: Fully compatible in parameters but relatively higher in price.
– Delixi CDX2-5011: Close in cost-effectiveness; some models provide UL certification.
- User Reviews and Precautions
- User Feedback
– Most users recognize its durability, with no faults during continuous operation under resistive loads for 2 years.
– Some users mentioned that the 220V coil may malfunction during voltage fluctuations, and it is recommended to use it with a voltage stabilizer.
- Selection Precautions
– Confirm the load type: Different contact capacities are required for AC-3 (motors) and AC-4 (high-inductance loads).
– Environmental Adaptability: It is recommended to install a dust cover in dusty environments; prioritize the NXC series in high-temperature environments.
