In industrial automation, electrical control systems, and motor operation scenarios, contactors are essential electrical components that undertake the core task of circuit switching and control. Many engineers and electrical practitioners often ask: What is the purpose of a contactor? Understanding its functional value is crucial for building stable, efficient, and safe electrical control systems. This article will thoroughly explain the role of contactors and focus on introducing the CJX2 III(NEW) Series AC Contactor launched by Zhejiang C&J Electrical co., ltd. (C&J Electrical), a high-performance solution for AC circuit control.
Summary. A contactor is a special type of relay used for switching an electrical circuit on or off. They are most commonly used with electric motors and lighting applications.
An AC Contactor is a specialized electromagnetic switching device designed for AC circuits, which uses the electromagnetic force generated by the control circuit to drive the contact closure or separation, thereby realizing the remote connection and disconnection of the main circuit. Different from ordinary relays, AC contactors are designed to bear large current loads, can complete frequent circuit switching operations, and are specially adapted to the start, stop and speed regulation control of AC motors. As a core component of electrical control, it is widely used in industrial production, building electrical, mechanical equipment and other fields, and is the key to ensuring the automatic and intelligent operation of electrical systems.
Overview of C&J Electrical CJX2 III(NEW) Series AC Contactor
The CJX2 III(NEW) Series AC Contactor independently developed and produced by C&J Electrical is a high-performance industrial-grade AC contactor, specially designed for AC circuit control scenarios with 50Hz (or 60Hz) frequency, rated voltage up to 690V and rated current up to 95A. The product fully complies with GB/T14048.4 and IEC60947-4 international and national standards, with stable performance, reliable operation and strong environmental adaptability.
This series of AC contactors is mainly used for remote on-off control of AC circuits and frequent starting and operation control of AC motors. It can be flexibly combined with matching thermal relays to form an electromagnetic starter, which not only realizes the basic control of the motor, but also provides effective overload protection for the circuit and motor, avoiding equipment damage caused by long-term overload operation. With a complete product specification system and humanized structural design, it has become a reliable choice for various AC circuit control projects.
Core Features & Advantages of CJX2 III(NEW) Series AC Contactor
The CJX2 III(NEW) Series AC Contactor stands out in the market with its excellent performance, complete specifications and practical design, and its core advantages are as follows:
- Wide load adaptation range: The rated current covers 9A-95A, the rated power is 4kW-45kW, and it is applicable to the control of AC motors and circuits of different power levels, with strong versatility.
- Flexible control voltage: The control circuit voltage supports 24V-440V (50/60Hz), which can be flexibly matched with various industrial control power supplies and adapt to different electrical control system configurations.
- Diverse auxiliary contacts: Provide two types of auxiliary contact configurations: 4NO+0NC and 2NO+2NC, which meet the needs of circuit interlocking, signal feedback and auxiliary control, and improve the flexibility of system design.
- Compliant with international standards: In line with IEC/EN 60947-4-1 and national GB standards, the product performance is stable and reliable, and it can meet the application requirements of global industrial projects.
- Frequent switching performance: Optimized electromagnetic system and contact structure design, able to withstand frequent circuit switching operations, and adapt to the working characteristics of frequent start and stop of AC motors.
- Easy combination and expansion: It can be quickly combined with thermal relays to form an electromagnetic starter with overload protection function, reducing the difficulty of system assembly and saving installation space.
- High safety performance: The contact has good conductivity and arc extinguishing performance, which effectively prevents arc generation during switching and ensures the safety of circuit operation and equipment.
Technical Specifications of CJX2 III(NEW) Series AC Contactor
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Parameter
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Details
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Product Model
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CJX2 III(NEW) Series AC Contactor
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Applicable Frequency
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50Hz/60Hz
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Rated Working Voltage
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Up to 690V AC
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Rated Working Current
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9A – 95A
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Rated Power
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4kW – 45kW
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Control Circuit Voltage
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24V – 440V AC (50/60Hz)
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Auxiliary Contact Configuration
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4NO+0NC, 2NO+2NC
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Compliant Standards
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GB/T14048.4, IEC60947-4, IEC/EN 60947-4-1
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Core Application
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Remote circuit on-off, AC motor frequent start control
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Matching Accessory
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Thermal relay (for overload protection)
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Application Range of CJX2 III(NEW) Series AC Contactor
Thanks to its complete specifications, stable performance and flexible configuration, the CJX2 III(NEW) Series AC Contactor is widely used in various industrial and commercial electrical control scenarios, mainly including:
- Industrial motor control: Frequent start and stop control of AC motors in production lines, machine tools, conveyors, fans, water pumps and other mechanical equipment, realizing automatic operation of industrial equipment.
- Building electrical systems: Control of lighting systems, air conditioning and ventilation equipment, water supply and drainage pumps in shopping malls, office buildings, residential quarters and other buildings, improving the intelligent level of building electrical.
- Power distribution and control: On-off control and power distribution management of low-voltage AC power distribution circuits in factories, workshops and power distribution rooms, ensuring the safe and stable operation of the power distribution system.
- Hoisting and transportation equipment: Control of hoists, cranes, elevators and other hoisting and transportation equipment, with reliable switching performance to ensure the safe operation of equipment.
- Agricultural electrical equipment: Control of AC motors in agricultural irrigation pumps, grain drying equipment and agricultural machinery, adapting to the harsh working environment of agricultural production.
- Electrical control cabinets: As the core switching component of various customized electrical control cabinets, it is used for circuit control and equipment protection in different industries.
Why Choose C&J Electrical CJX2 III(NEW) Series AC Contactor?
C&J Electrical has been focusing on the R&D and production of industrial electrical components for a long time, and the CJX2 III(NEW) Series AC Contactor is a high-quality product carefully built for AC circuit control scenarios. Choosing this product has the following core reasons:
- Reliable product quality: Strictly in accordance with international and national standards for production and testing, the electromagnetic system and contact parts are made of high-quality materials, with long service life and stable operation.
- Complete product specifications: The current, power and control voltage cover a wide range, and the auxiliary contact configurations are diverse, which can meet the personalized control needs of different customers.
- Strong compatibility: It can be perfectly matched with thermal relays, circuit breakers and other electrical components, and is easy to integrate into various electrical control systems, with strong scalability.
- Easy installation and maintenance: Humanized structural design, simple installation and wiring, convenient daily maintenance and part replacement, reducing the later operation and maintenance cost.
- OEM customization support: Provide professional OEM brand customization services, and can customize product labels, logos and other details according to customer needs to meet the brand operation needs of partners.
- Wide application adaptability: It is suitable for various industrial, commercial and agricultural electrical control scenarios, with strong environmental adaptability and can work stably in different working conditions.
Get in Touch
If you have any questions about the CJX2 III(NEW) Series AC Contactor, such as product model selection, technical parameters, matching accessories, customization needs or bulk orders, please feel free to contact C&J Electrical. Our professional technical team will provide you with targeted AC circuit control solutions and reliable after-sales service to help you build a stable and efficient electrical control system.
Post time: Mar-24-2026