8 Best Metal Oxide Varistors of 2026 – Essential Components for Your Electronics

In 2026, the top eight metal oxide varistors (MOVs) include the NTE1V130 with a 130V RMS rating for protecting sensitive electronics, and the uxcell series, featuring 10 pieces rated for AC 175V. The Fielect offers a compact design with moisture resistance, while the 07D Varistor Kit provides 150PCS across various voltages for versatile use. Consider factors like voltage rating, energy capacity, and peak current to guarantee suitable protection for your projects. Continue to explore these options for further insights.

Key Takeaways

• The NTE1V130 Varistor provides high transient current handling and rapid response, making it ideal for protecting sensitive electronic components from surges.
• uxcell’s voltage dependent resistor offers exceptional durability and high voltage ratings, perfect for safeguarding electronic devices against transient voltage spikes.
• Fielect’s varistor features high impulse current capability and moisture resistance, suitable for filtering in various electronic instruments.
• The 07D Varistor Kit offers a diverse selection with 15 voltage values, useful for both DIY projects and professional electronics applications.
• Lord of the Tools’ compact disc type varistor ensures high-energy surge protection, fitting well in home appliances and industrial devices needing reliability.

NTE Electronics NTE1V130 Metal Oxide Varistor

NTE Electronics NTE1V130 Metal Oxide Varistor, 130V RMS Voltage, 8.55 mm Case Diameter, 10 Joules...

• High energy capability
• The value for "n" is greater
• Very low leakage current

View Lastest Price

The NTE Electronics NTE1V130 Metal Oxide Varistor is an excellent choice for anyone looking to protect sensitive electronic components from voltage surges. With a voltage rating of 130V RMS and an energy capacity of 10 Joules, this varistor can handle sudden spikes effectively. Its peak current rating of 1200 amps shows impressive transient response, making it highly reliable in critical situations. Low leakage current and low capacitance guarantee minimal energy loss, which is beneficial for efficiency. Additionally, its fast response time prevents damage during voltage fluctuations, making it an ideal component for various electronic applications, including power supplies and circuit protection systems.

Best For: Individuals and businesses seeking reliable protection for sensitive electronic components from voltage surges.

Pros:

• High transient current handling capability with a peak current rating of 1200 amps.
• Low leakage current and low capacitance ensure minimal energy loss and improved efficiency.
• Fast response time effectively prevents damage during voltage fluctuations.

Cons:

• Voltage rating of 130V RMS may not be suitable for applications requiring higher voltage protection.
• Energy capacity of 10 Joules may limit its effectiveness in high-energy environments.
• Requires careful selection to ensure compatibility with specific applications.

uxcell 10Pcs Voltage Dependent Resistors (AC 175V)

uxcell 10Pcs Voltage Dependent Resistors AC 175V 10D271K Radial Lead Disc Varistors

• Model: 10D271K; Max. Allowable Voltage: AC 175V; DC 225V; Varistor Voltage: 270V ±10%
• Max. Clamping Voltage (8/20 μS): 455V; Max. Clamping Current (8/20 μS): 25A
• Lead Size: 24 x 0.7mm / 0.94" x 0.03" (L*D); Lead Spacing : 7.5mm / 0.3"; Lead Type: Straight

View Lastest Price

For anyone looking to safeguard their electronic equipment effectively, the uxcell 10Pcs Voltage Dependent Resistors (Model: 10D271K) stand out as a reliable choice. With a maximum allowable voltage of AC 175V and DC 225V, these resistors are designed to absorb harmful voltage spikes. This helps protect sensitive circuits in your devices. Each varistor operates at a voltage of 270V, ensuring performance and safety under typical conditions. You’ll also appreciate the robust construction, which includes a specific epoxy-coated disc that enhances durability. Their long life and effective clamping capabilities make them essential for maintaining the longevity of your electronics.

Best For: Those seeking to protect their electronic devices from transient voltage spikes and ensure long-lasting performance.

Pros:

• High Voltage Ratings: Supports up to AC 175V and DC 225V, making it suitable for various electronic applications.
• Effective Protection: Designed to absorb harmful voltage spikes, safeguarding sensitive circuitry.
• Durable Construction: Features epoxy-coated discs for enhanced durability and longevity.

Cons:

• Specific Use Only: Primarily designed for transient voltage suppression, not for general resistor applications.
• Limited Voltage Range: May not be suitable for devices requiring higher voltage protection beyond its max ratings.
• Radial Lead Type: Installation may be more challenging in compact spaces due to lead configuration.

Fielect 10Pcs Voltage Dependent Resistors (Radial Lead Disc Varistors)

Fielect 10Pcs Voltage Dependent Resistors AC 175V 14D271K/F7.5 Radial Lead Disc Varistors

• 【Dimension】 - Model:14D271K;Maximum impulse current:4500A;Rated power:0.6W;Maximum energy:70J;Varistor voltage:270V;Foot length:24mm/0.94";Foot...
• 【Material】 -The resistor is made of ZnO film, with a special epoxy resin coated disc structure with radial leads, and has a long service life
• 【Features】-The capacitor has the characteristics of low loss, high working voltage and stability, stable capacity and high temperature resistance

View Lastest Price

Fielect’s 10Pcs Voltage Dependent Resistors, also known as radial lead disc varistors, stand out for their reliability and performance in protecting electronic equipment from voltage spikes. Each varistor, with a varistor voltage of 270V, is capable of handling a maximum impulse current of 4500A and a power rating of 0.6W. Made from ZnO film and featuring an epoxy resin coating, they offer moisture resistance and high-temperature stability. These varistors are perfect for applications like filtering and resonance coupling in electronic instruments, ensuring long service life and consistent protection against transients that can damage your devices.

Best For: Electronic engineers and hobbyists seeking reliable voltage protection for sensitive electronic equipment.

Pros:

• Durable and moisture-resistant, ensuring a long service life.
• High impulse current handling capability (4500A) for effective surge protection.
• Compact design with radial leads for easy integration into circuits.

Cons:

• Limited to a varistor voltage of 270V, which may not suit all applications.
• Rated power of 0.6W may not be adequate for high power applications.
• Requires proper installation to ensure optimal performance and safety.

07D Varistor 15 Values Kit (150PCS, 22V-820V)

07D Varistor 15 Values 150PCS 22V-820V Voltage Dependent Resistors Kit 07D390K 07D470K 07D820K...

• 07D Type Varistor 15Values ,each 10 Pcs All 150PCS,from 22V to 820V Voltage Dependent Resistors
• The Varistor Resistors Values :07D220K (22V) 07D270K (27V) 07D330K (33V) 07D390K (39V) 07D470K (47V) 07D820K (82V) 07D181K (180V) 07D271K (270V)
• The Varistor Resistors Values : 07D391K (390V) 07D431K (430V) 07D471K (470V) 07D561K (560V) 07D621K (620V) 07D681K (680V) 07D821K (820V)

View Lastest Price

Engineers and hobbyists seeking reliable voltage protection solutions will find the D Varistor 15 Values Kit (150PCS, 22V-820V) an important asset for their projects. This extensive kit includes 150 varistors, featuring 15 distinct voltage values ranging from 22V to 820V. Each value, like the 07D220K (22V) or the 07D821K (820V), comes in packs of ten, ensuring you have ample supplies for various applications. Varistors are vital for protecting electronics from transient voltage spikes, making them ideal for both DIY projects and professional endeavors. This diverse selection streamlines sourcing, enhancing project efficiency and reliability in voltage management.

Best For: Engineers and hobbyists seeking reliable voltage protection solutions for their electronic projects.

Pros:

• Extensive selection of 15 different voltage values, providing versatile options for various applications.
• Each varistor value is available in packs of 10, ensuring a sufficient supply for projects.
• Designed specifically for protecting electronic equipment from transient voltage spikes, enhancing device reliability.

Cons:

• May be overwhelming for beginners who are unfamiliar with varistor specifications.
• The total quantity of 150 pieces may exceed the needs of smaller projects.
• Varistors may require additional components or knowledge for optimal integration in circuits.

The Lord of the Tools Disc Type Metal Oxide Varistor Surge Protector (20PCS)

The Lord of the Tools 20PCS TVR10271 Disc Type Metal Oxide Varistor Oxide Surge Protector Foot...

• Precise Surge Protection Design: TVR10271 is designed to protect equipment from transient voltage spikes. Designed for high-efficiency surge suppression, ensuring safety...
• Compact and Reliable Build: Dimensions of 10.1x5mm with 5mm leads allow easy integration into circuit boards.
• Construction: Made from durable metal materials, this varistor offers excellent electrical conductivity and stability, ensuring long-lasting performance even in demanding...

View Lastest Price

When dealing with transient voltage spikes, the Lord of the Tools Disc Type Metal Oxide Varistor Surge Protector (20PCS) stands out as a reliable choice for both hobbyists and professionals. This product measures 10.1x5mm with 5mm leads, making it compact enough for seamless integration into circuit boards. Designed specifically for high-efficiency surge suppression, it protects home appliances and industrial devices against high-energy surges. The durable metal construction guarantees stability and excellent electrical conductivity. With 20 pieces in a set, you’ll have ample replacements for various projects or repairs, making certain your electronics remain safe and functional in demanding environments.

Best For: The Lord of the Tools Disc Type Metal Oxide Varistor Surge Protector is best for electronics enthusiasts and professionals seeking reliable surge protection in their circuits.

Pros:

• Compact Design: Easy to integrate into circuit boards without taking up much space.
• Durable Construction: Offers excellent electrical conductivity and stability in demanding environments.
• Value Pack: Comes in a set of 20 pieces, providing ample replacements for multiple projects.

Cons:

• Size Limitation: May be too small for certain applications requiring larger components.
• Specific Use Case: Primarily designed for surge protection, limiting versatility in other applications.
• Requires Soldering Skills: Installation may not be suitable for beginners without prior experience in electronics.

Varistor 150 PCS Voltage Dependent Resistors Kit

KOKISO Varistor 15 Values 150 PCS Voltage Dependent Resistors Kit...

• The Varistor Resistors Values : 5D471K,7D121K,7D241K,7D431K,7D471K,10D121K,10D241K,10D271K,10D331K,10D391K,10D431K,10D471K,14D121K,14D431K,14D471K
• Varistor Voltage: : Choose 15 commonly used voltage and resistance values, including 120V, 240V, 270V, 330V, 390V, 430V, 470V.
• Easy to Sort: Each model has a small bag and a mark. Box also has a marked model for easy identification.

View Lastest Price

If you’re looking for an extensive solution to voltage protection, the Varistor 150 PCS Voltage Dependent Resistors Kit is an excellent choice for both hobbyists and professionals. This kit includes fifteen different models, such as 5D471K and 10D391K, covering commonly used voltage levels from 120V to 470V. Each resister is organized in labeled bags, which simplifies identification during projects. Additionally, the included storage box guarantees easy management, protecting your components from damage. With these varistors, you’ll be equipped to safeguard your electronics against transient voltage spikes, enhancing the longevity and performance of your devices.

Best For: This product is best for hobbyists and professionals seeking effective voltage protection for their electronic devices.

Pros:

• Easily organized with labeled bags for quick identification.
• Comprehensive kit includes a wide range of voltage ratings from 120V to 470V.
• Comes with a storage box for efficient management and protection of components.

Cons:

• May contain more pieces than needed for smaller projects.
• Some users may find the variety overwhelming if they only need specific values.
• Limited information on specifications for each individual varistor model.

uxcell 7D471K Metal Oxide Varistor Set of 31 Pieces

uxcell 7D471K 470V 3cm Length Metal Oxide Varistor Voltage Dependent Resistor 31 Pcs, Multi-Colour...

• Product Name : Metal Oxide Varistor;Material : Metal, Plastic
• Body Size (Exclude Lead) : 0.7x3cm / 0.28" x 1.18" (D*L);Model : 7D471K
• Max. Limited Voltage : 470v;Lead Length : 2.1cm / 0.83"

View Lastest Price

The uxcell 7D471K Metal Oxide Varistor Set, containing 31 pieces, is an excellent choice for hobbyists and professionals seeking reliable surge protection for sensitive electronics. Each varistor measures 0.7 x 3 cm and can handle a maximum limited voltage of 470V. This set is multi-colored, making organization easier. With a lead length of 2.1 cm and spacing of 0.5 cm, these components fit in various circuit boards. You’ll find these varistors ideal for voltage-dependent applications where excess voltage can cause damage. They offer protection for devices like power supplies, motors, and other electronics, ensuring long-lasting performance.

Best For: Hobbyists and professionals seeking reliable surge protection for sensitive electronics.

Pros:

• Easy to organize and identify with a multi-colored design.
• Suitable for a wide range of voltage-dependent applications.
• Compact size fits well in various circuit board layouts.

Cons:

• Limited to a maximum voltage of 470V, may not be suitable for higher voltage applications.
• The set contains 31 pieces, which may be excessive for small projects.
• Requires basic electronics knowledge for proper installation and use.

10x Metal Oxide Varistor TVR10241V 240V 150AC 200DC

Be In Your Mind 10x Metal Oxide Varistor TVR10241V 240V 150AC 200DC Compatible with TKS Surge...

• OEM: TVR10241V
• TVR10241V varistor is specially designed for surge protection. It can respond quickly and limit overvoltage, effectively protecting circuit safety
• 240V nominal voltage, 150V AC and 200V DC voltage are applicable, which can withstand high energy impact and ensure stable operation of the equipment

View Lastest Price

Choosing the right surge protection can greatly impact the longevity and safety of your electronic devices, and the 10x Metal Oxide Varistor TVR10241V stands out for its reliability in this area. This varistor handles nominal voltages of 240V, with surge capacities of 150V AC and 200V DC, ensuring effective overvoltage limitation. Constructed from durable metal, it boasts excellent conductivity for stability in harsh environments. Suitable for both home appliances and industrial devices, its design effectively manages high-energy surges, ensuring stable operation. Incorporating this varistor can considerably enhance circuit protection, safeguarding critical systems from damaging electrical spikes.

Best For: Homeowners and industrial operators looking for reliable surge protection for their electronic devices.

Pros:

• Effective surge protection with a quick response to limit overvoltage and safeguard circuits.
• Durable construction from metal materials provides excellent electrical conductivity and stability.
• Versatile application suitable for both home appliances and industrial devices, enhancing circuit safety in critical systems.

Cons:

• Limited to handling up to 150V AC and 200V DC, which may not suffice for high power applications.
• Requires proper installation to ensure optimal performance, which may need professional expertise.
• Can be susceptible to degradation over time with exposure to frequent high-energy surges.

Factors to Consider When Choosing a Metal Oxide Varistor

Choosing the right metal oxide varistor (MOV) begins with understanding its voltage rating, which indicates the maximum voltage the device can handle without failing. You should also consider clamping voltage, which is the maximum voltage the varistor allows during a surge, to guarantee it protects your circuits effectively. Additionally, you’ll want to assess energy capacity requirements, peak current specifications, and response time efficiency to match the varistor to your specific application.

Voltage Rating Importance

When determining which metal oxide varistor (MOV) to use, it’s essential to contemplate the voltage rating carefully, since it plays a significant role in protecting your electronic devices. The voltage rating indicates the maximum voltage the MOV can handle continuously without conducting current. Always verify the MOV’s rating meets or exceeds your application’s voltage requirements, whether for AC or DC circuits. For example, if your system operates at 120V AC, select a varistor with a minimum rating of 150V. This choice minimizes the risk of breakdown during voltage spikes and helps maintain the varistor’s lifespan. Understanding this relationship between varistor voltage and system voltage is important for preventing damage to sensitive components in your electronics.

Clamping Voltage Considerations

As you evaluate metal oxide varistors (MOVs), understanding clamping voltage is key to effective circuit protection. Clamping voltage is the maximum voltage an MOV can tolerate before it conducts significant current, safeguarding your circuit from voltage spikes. Choose a varistor with a clamping voltage higher than your circuit’s maximum operating voltage but low enough to prevent damage to sensitive components. For example, if your circuit operates at 120V, consider an MOV with a clamping voltage around 150V. Lower clamping voltages can protect delicate electronics better, yet they may struggle with high surge events. Always review testing results and specifications to ascertain the clamping voltage meets your application requirements, effectively preventing potential damage from electrical surges.

Energy Capacity Requirements

Energy capacity requirements are essential factors to evaluate in your selection of metal oxide varistors (MOVs). This specification, measured in Joules, indicates how much energy a varistor can absorb during transient events, like surges. It’s vital to choose a varistor with an energy capacity that exceeds the maximum expected surge energy. For example, if your application typically generates lower energy spikes, a capacity of 10 Joules may suffice. However, be aware that higher energy capacity varistors often come in larger sizes, which can impact your circuit design and layout. Additionally, consider the application environment, as high-energy transients require varistors with robust energy handling capabilities for reliable performance and protection of connected equipment.

Peak Current Specifications

Selecting the right metal oxide varistor (MOV) involves understanding peak current specifications, which indicate the maximum transient current the varistor can handle without failing. These ratings, measured in amperes, are essential for guaranteeing your MOV effectively protects against voltage spikes. For instance, the NTE1V130 model boasts a peak current rating of 1200 amps, demonstrating its capability to withstand significant energy surges. When choosing a varistor, verify its peak current rating exceeds the expected surge currents in your application. Varistors designed for high energy environments typically offer ratings from hundreds to thousands of amps, providing better reliability and longevity in systems that frequently experience electrical surges. Be informed and select smartly. Your electronics deserve proper protection.

Response Time Efficiency

Choosing the right metal oxide varistor (MOV) means considering its response time efficiency, which plays a key role in its ability to protect your devices from voltage spikes. The response time is essential, as MOVs utilize barrier layer technology to react swiftly to transient voltage surges. Look for MOVs that can handle high transient currents, ideally rated up to 4500A, as they will absorb significant energy spikes without failing. Clamping voltage, or the maximum voltage an MOV allows before conducting, directly impacts how quickly it responds. High-energy capable MOVs not only react rapidly but also contribute to stability. As a result, select MOVs with low leakage current characteristics for best efficiency during non-surge conditions, ensuring they serve your electronics effectively.

Leakage Current Levels

Leakage current levels play an essential role when evaluating metal oxide varistors (MOVs). Ideally, you want these levels to be as low as possible. A low leakage current means your MOV won’t draw much power when it’s not responding to voltage spikes, thereby improving energy efficiency and standby performance. For example, a varistor with a leakage current of less than 10 µA can appreciably enhance overall system stability. Excessive leakage, on the other hand, creates unwanted heat that can damage components and shorten the varistor’s lifespan. When selecting a varistor, look for models with specified low leakage current values to avoid energy waste and guarantee better performance in your electrical applications. This simple choice can lead to greater efficiency and reliability.

Physical Size and Design

When considering metal oxide varistors (MOVs), the physical size and design are important factors that directly affect their performance and integration into your circuit. The case diameter typically ranges around 8.55 mm, affecting space requirements considerably. Lead spacing, commonly about 7.5 mm, is critical for ensuring compatibility with your circuit board layout. Additionally, leads usually measure around 24 mm in length, offering versatile mounting options and aiding in various configurations. The typical epoxy resin coating on the disc provides moisture resistance and durability, important for high-capacity applications. Compact structures are necessary, as they must withstand considerable thermal and electrical stresses, making the right size and design essential for your project’s success.

Frequently Asked Questions

How Do Metal Oxide Varistors Work in Circuit Protection?

Metal oxide varistors, or MOVs, protect circuits by clamping voltage surges. When the voltage exceeds a specific threshold, usually around 14 volts, the MOV rapidly reduces resistance, diverting excess energy away from sensitive components. This action helps prevent damage from spikes, like those caused by lightning. You’ll often find MOVs in power supplies, surge protectors, and consumer electronics. They guarantee reliable operation, safeguarding your devices against unexpected electrical disturbances effectively.

What Is the Lifespan of a Typical Metal Oxide Varistor?

A typical metal oxide varistor (MOV) can last anywhere from 5 to 10 years under normal conditions. However, its lifespan greatly depends on the voltage spikes it faces. While MOVs protect circuits from transient voltage surges, repeated exposure to high energy can cause degradation. Consequently, if you want reliability, monitor your MOVs regularly, especially in high-stress environments, and replace them when you notice signs of wear, like cracking or discoloration.

Can Varistors Be Used in High-Frequency Applications?

Varistors aren’t typically suited for high-frequency applications. They’re designed mainly for voltage clamping in power circuits, working best at lower frequencies. In high-frequency situations, their response time can be too slow, leading to inefficiencies. For example, they might not adequately protect sensitive components in RF circuits used in communication devices. Instead, consider using specialized components like RF go-through waveguides or capacitors that are designed to handle higher frequencies.

What Are the Signs of a Failing Metal Oxide Varistor?

If you think of a metal oxide varistor (MOV) as a safety net for your electronics, then you should recognize when it’s fraying. Signs of a failing MOV include visible discoloration, cracking, or bulging. You might also notice a loss of functionality in connected devices or blown fuses. If you measure the resistance and find it unusually low, it’s time to replace the varistor before it affects your equipment further.

Are There Any Safety Precautions When Handling Varistors?

When handling varistors, always wear safety glasses and gloves. These components can fail and release energy, so it’s crucial to minimize exposure. Before you start, make certain the power is off and discharge any stored voltage. Avoid touching the terminals to prevent electric shocks, as they can still hold charge. Dispose of defective varistors properly according to local regulations, as they can be hazardous waste. Follow these precautions to guarantee your safety.