One-Stop Solution To Electric

We offer a wide range of voltage protector devices, including our top-quality Modular Digital Over & Under Voltage Protector that helps to ensure an uninterrupted power supply and safeguard your valuable electronics.

TOSUNlux Voltage Protector

Safeguard your valuable appliances and enjoy an uninterrupted power supply with the TOSUNlux Modular Digital Over & Under Voltage Protector.

The TOSUNlux Modular Digital Over & Under Voltage Protector is a state-of-the-art household electrical equipment protector. This versatile device comes in both 1P and 3P configurations, offering self-healing phase failure and phase sequence protection.

Its main function is swiftly disconnecting the power supply to shield appliances from any potential damage during power interruptions or voltage fluctuations, ensuring their safety.

Moreover, after power recovery, the protector automatically reconnects the power with a slight 1-2 minute delay to avoid abrupt surges. Its fully automated protective actions and clear panel indicators make it incredibly user-friendly and reliable. Crafted from premium materials, this protector guarantees exceptional performance and long-lasting dependability.

TOSUNlux Voltage & Current Protector

Take a look at TOSUNlux voltage protector


1P,3Pavailable; convenient in use, reliable in quality and excellent in performance.


a new generation of home appliance protectors


Automatic circuit break protection; Delayed automatic start after power is restored


3P 380VAC; Over-Voltage Cut-Off Value:390-450 adjustable


Rated Supply Voltage: AC 380V; Operation Voltage Range: AC140~700V(three phase)


Using advanced zero processing technology, safe and reliable to use


Modular Smart Energy Meter:Real-time energy consumption monitoring;remote circuit control;Adjustable parameter control

Why Choose TOSUNlux Brand?

Cutting-Edge Technology

Embrace the forefront of innovation and enjoy state-of-the-art features, setting TOSUNlux products apart in the ever-evolving market landscape.

Diverse Product Ranges

Discover an extensive array of products tailored to address diverse needs and applications, ensuring unmatched versatility and choice for customers

Certification and Quality

Experience peace of mind with TOSUNlux’s products that hold industry certifications and undergo rigorous testing, guaranteeing impeccable quality and reliability.

Years of Experience

Benefit from TOSUNlux’s extensive industry experience, accumulated over 31 years, leading to the development of well-crafted, dependable, and customer-focused solutions.

Large-Scale Production

Rely on TOSUNlux’s capacity to meet high demand efficiently through its streamlined large-scale production capabilities without compromising product excellence.

Best Price

Enjoy the assurance of competitive pricing, as TOSUNlux offers products at the best price points, delivering exceptional value for your investment.

About TOSUNlux

TOSUN, a prominent Chinese manufacturer and supplier founded in 1994, specializes in low-voltage electrical and lighting products. As a premier Modular Digital Voltage & Current Protector Manufacturer, we deliver cutting-edge solutions for seamless electrical control. Our commitment extends to diverse innovative voltage-protecting devices, catering to various industrial demands with pride.

Quality and Certification

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All Your Questions

Here are some frequently asked questions about TOSUNlux Modular Digital Over & Under Voltage Protector:

A modular digital over and under voltage protector is an advanced electrical device designed to safeguard appliances and equipment from voltage fluctuations. It automatically disconnects power during overvoltage or undervoltage situations, preventing potential damage. With a built-in delay, it re-establishes power once the voltage stabilizes, ensuring smooth operation and protection.

Overvoltage and undervoltage protection are electrical safety measures designed to protect appliances and equipment from voltage fluctuations. Overvoltage protection prevents damage caused by excessive voltage levels, while undervoltage protection guards against potential issues arising from low voltage levels. These safeguards ensure the longevity and reliability of electrical devices.

A voltage protector, also known as a voltage regulator or surge protector, is a device used for voltage protection. It safeguards electrical appliances and equipment from damage caused by voltage fluctuations, including overvoltage and undervoltage situations, ensuring a stable and safe power supply for the connected devices.

The purpose of a modular digital over and under voltage protector is to provide advanced electrical protection for appliances and equipment. It automatically detects and responds to voltage fluctuations, disconnecting power during overvoltage or undervoltage conditions to prevent potential damage. After stabilization, it reconnects power, ensuring safe and uninterrupted operation.

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Secure your electronics with a TOSUNlux voltage protector —advanced protection for uninterrupted power supply. Contact us now for more details! 



The Over Voltage Protector finds various applications across different sectors. In households, it safeguards sensitive electronic devices like TVs, computers, and home appliances from voltage fluctuations, ensuring their longevity and optimal performance. In commercial settings, it shields office equipment and machinery from power surges, reducing downtime and repair costs. Moreover, industries rely on it to protect critical machinery and production lines, preventing costly breakdowns. Its versatility and effectiveness make it a vital component in securing electrical systems across residential, commercial, and industrial environments. 

More Reliable Solution To Electric

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 Clean a Modular Digital Over & Under Voltage Protector?


Cleaning a Modular Digital Over & Under Voltage Protector is essential to maintain its optimal performance and ensure reliable protection for your valuable electronic devices. Over time, dust, dirt, and debris can accumulate on the protector’s surface and components, potentially hindering its efficiency. Regular cleaning helps prevent overheating and potential malfunctions, extending the lifespan of the protector. In this article, we will guide you through simple and effective steps to clean your voltage protector safely.

  •    Disconnect the Power: Before starting the cleaning process, make sure to turn off and unplug the voltage protector from the power source to avoid any electrical hazards.
  •    Exterior Cleaning: Gently wipe the exterior surfaces of the voltage protector with a soft, dry cloth to remove any dust or dirt. Avoid using harsh chemicals or abrasive materials that could damage the device.
  •    Ventilation Openings: Pay close attention to the ventilation openings or cooling vents. These areas are prone to gathering dust, which can restrict airflow and cause overheating. Use a soft brush or compressed air to carefully clean the openings and remove any debris.
  •    Indicator Lights:If your voltage protector has indicator lights, ensure they are free from dust and dirt. Clean them gently to maintain their visibility and functionality.
  •    Internal Components:While cleaning the internal components requires more caution, it is essential for optimal performance. If you are confident in handling electronics, you can carefully open the protector following the manufacturer’s guidelines. However, it is recommended to consult a professional technician for internal cleaning to avoid accidental damage.
  •    Compressed Air:For cleaning the internal components without opening the protector, use a can of compressed air. It allows you to blow away dust and debris without physically touching the sensitive components.
  •    Reassembly:If you disassembled the protector, ensure all the components are reassembled correctly before plugging it back in. Follow the manufacturer’s instructions to avoid any errors during reassembly.
  •    Test Run:After cleaning and reassembling, perform a test run to ensure the protector is functioning correctly. Check the indicator lights and ensure that the device responds appropriately to voltage fluctuations.
  •    Regular Cleaning Schedule:To maintain the protector’s efficiency, establish a regular cleaning schedule. Depending on the environment and usage, cleaning every three to six months is generally sufficient.

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