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TOSUNlux Modular Contactor

TOSUNlux Modular Contactors set a new standard for electrical control, providing seamless switching, advanced safety features, and efficient operation. With their reliable performance and adaptability, they serve as essential components for various industrial and commercial applications.

Experience the exceptional TOSUNlux LCH8 Modular Contactor, a cutting-edge electrical control solution offering versatility, safety, and efficiency. With 2P, 3P, and 4P configurations, it ensures precise circuit control, promoting seamless switching and optimal operation. The built-in protection features guarantee enhanced safety for both equipment and personnel. Embrace improved energy efficiency, reducing power wastage and cutting costs. With a durable build, it promises longevity, reducing the need for frequent replacements. Maintenance is a breeze, thanks to its user-friendly design

Why Choose TOSUNlux Brand?

There are several reasons to choose TOSUNLUX AC contactor brand for your electrical needs:


Wide-Range of Products

Embrace the vast array of cutting-edge electrical solutions offered by TOSUNlux, providing a comprehensive selection that caters to a broad spectrum of needs and applications.

Quality and Durability

Rest assured with TOSUNlux home ac contactors’ superior craftsmanship, ensuring unparalleled quality, resilience, and long-lasting performance for your electrical systems.

Safety and Reliability

Prioritize safety with TOSUNlux’s meticulously designed products, incorporating advanced safety features that guarantee dependable operation even in critical scenarios.


Unlock exceptional value with TOSUNlux’s commitment to delivering high-quality Home AC Contactor and other products at competitive prices, ensuring cost efficiency without compromising on performance.

Bulk Production Capacity

Rely on TOSUNlux’s robust manufacturing capabilities, which enable timely and efficient delivery, making it an ideal partner for projects of any scale.

Certified Products

Trust in TOSUNlux’s dedication to excellence as their products undergo rigorous testing and certification, adhering to industry standards and meeting stringent quality assurance requirements.

About TOSUNlux

Established in 1994, TOSUN is a leading Chinese manufacturer and supplier specializing in low-voltage electrical and lighting products. As the premier LCH8 Modular Contactor Manufacturer, we offer top-notch solutions for efficient electrical control. Additionally, we take pride in providing a diverse range of innovative Modular Contactors to cater to various industrial needs.

Quality and Certification

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All Your Questions

Here are some frequently asked questions about Modular Contactor

A modular contactor is an electrical switching device designed for controlling and switching electrical circuits. It features a modular design, allowing it to be easily installed and integrated into electrical panels. Modular contactors are commonly used for various applications, offering reliable control and automation capabilities in electrical systems

The main difference between a modular contactor and a power contactor lies in their application and power-handling capacity. A modular contactor is generally used for controlling small to medium loads in low-voltage applications, while a power contactor is designed for handling higher currents and voltages in industrial settings, often for motor control or heavy-duty equipment.

The price of a modular contactor can vary depending on factors such as the brand, specifications, current rating, number of poles, and the supplier’s pricing policy. Generally, for standard low to medium-power modular contactors, prices can range from $10 to $50 USD, but higher-rated or specialized variants can be more expensive.

The choice between a relay and a contactor depends on the specific application. Relays are suitable for low-power and control signal switching, ideal for smaller circuits. Contactors, on the other hand, are designed for handling higher currents and are more robust, making them better suited for industrial and heavy-load applications.

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The LCH8 Modular Contactor by TOSUNlux has configurations for 2 Pole Contactor, 3 Pole Contactor, and 4 Pole Contactor, finding wide-ranging applications in various industries. It is extensively used for motor control, lighting circuits, heating systems, air conditioning, pumps, compressors, and building automation. Its precise switching capabilities make it ideal for industrial machinery, while its safety features ensure reliable operation in critical applications. From commercial buildings to manufacturing facilities, the LCH8 Modular Contactor delivers efficient electrical control for a multitude of use cases.

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We Help Your Business to Connect and Grow on Large Scale

TOSUNlux has its own design team with a 5-people in-house design team, which provides 4-5 new series of products every year for our clients.

How to Repair a Modular Contactor?


Modular contactors are crucial components in electrical systems, responsible for controlling and switching circuits efficiently. However, like any electrical device, they may encounter issues over time due to wear, voltage spikes, or other factors. Understanding how to repair a modular contactor can be invaluable for maintaining smooth operations, minimizing downtime, and ensuring the safety of electrical installations. In this article, we will explore standard troubleshooting techniques and essential steps to repair a modular contactor effectively. 

How to Repair a Modular Contactor?

Repairing a modular contactor requires careful attention to detail and adherence to safety protocols. Here’s a step-by-step guide to troubleshooting and repairing a faulty modular contactor:

  •    Safety First: Before attempting any repairs, ensure the power supply to the contactor and related circuits is disconnected. Turn off the main electrical breaker to prevent any electrical hazards during the repair process.
  •    Visual Inspection: Conduct a thorough inspection of the contactor and its surrounding components. Look for signs of physical damage, burnt marks, loose connections, or any abnormalities that may indicate a problem.
  •    Check for Voltage: Using a multimeter, check for voltage across the contactor terminals. Verify that there is no residual voltage present after turning off the power supply. If there is voltage, double-check the circuit for any potential sources.
  •    Clean the Contactor: Dust and debris can accumulate over time, affecting the contractor’s performance. Gently clean the contactor using a soft brush or compressed air to remove foreign particles.
  •    Inspect Contacts: The contact points inside the modular contactor may experience wear or corrosion. Check for signs of pitting, melting, or blackening on the contact surfaces. Clean the contacts with a fine abrasive material if needed.
  •    Replace Defective Components: If you identify any damaged or malfunctioning parts, such as the coil or contacts, replace them with compatible and manufacturer-approved replacements.
  •    Check Coil Continuity: Test the coil’s continuity using a multimeter to ensure it functions correctly. If the ring is faulty, replace it with an appropriate new lock.
  •    Verify Control Signal: Ensure the control signal activating the contactor is within the rated specifications. Incorrect or unstable signs can lead to contactor failure.
  •    Inspect Auxiliary Contacts: If the modular contactor has auxiliary contacts, verify their functionality and cleanliness. Clean or replace any damaged additional contacts.
  •    Reassemble and Test: After completing the repairs, carefully reassemble the modular contactor. Double-check all connections and components to ensure everything is in place. Then, reapply the power and test the contactor’s functionality under safe conditions.

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