Best Varistors of 2025
* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
Varistors are electronic components that are designed to protect sensitive electronic devices from voltage spikes and surges. They work by regulating the flow of electrical current and stabilising voltage fluctuations within circuits. Varistors are commonly used in a variety of applications, including power supplies, telecommunications equipment, and consumer electronics. They come in a range of sizes and voltage ratings, making them suitable for use in a wide range of different devices. Despite their small size, varistors play a crucial role in protecting electronic equipment from damage caused by electrical surges, making them an essential component for any electronic system.
At a Glance: Our Top Picks
#TOP 1
9.8
#TOP 2
9.7
#TOP 3
9.5
Top 10 Varistors
sourcingmap 10 x 7D471K Voltage Dependent Resistors
The sourcingmap 7D471K Varistors are reliable voltage dependent resistors designed to protect your circuits. With a maximum allowable voltage of AC 300V and DC 385V, you can trust these components to handle substantial electrical loads safely. The max clamping voltage of 775V ensures that your devices are shielded from voltage spikes. Additionally, a typical capacitance of 105pF at 1kHz helps maintain signal integrity, making them ideal for various applications. These features provide you with peace of mind, knowing your sensitive electronics are well-protected.
sourcingmap 10D471K Voltage Dependent Resistors
The sourcingmap 10D471K Varistors are designed to protect your equipment from transient voltage spikes. With a maximum allowable voltage of AC 300V and a varistor voltage of 470V ±10%, these resistors ensure safety and reliability. The clamping voltage of 775V and maximum clamping current of 25A provide an extra layer of defence against voltage surges. Their specific epoxy coated disc construction enhances durability, making them ideal for long-term use. These features collectively offer peace of mind, knowing your devices are safeguarded.
sourcingmap 10D271K Voltage Dependent Resistors
The sourcingmap 10D271K Varistors are designed to protect your equipment from harmful transient voltage spikes. With a maximum allowable voltage of AC 175V and DC 225V, these components ensure safety in various applications. They feature a robust clamping voltage of 455V, helping to prevent damaging surges. Their specific epoxy-coated disc construction offers long-lasting durability, making them a reliable choice for your projects. With straight leads measuring 24 x 0.7mm, they are easy to integrate into your circuit designs.
sourcingmap 20Pcs 270V Voltage Dependent Resistors
The sourcingmap 10D271K Varistors are designed to protect your equipment from transient voltage spikes. With a maximum allowable voltage of AC 175V and DC 225V, these varistors help to ensure that your devices remain safe during voltage surges. The max clamping voltage of 455V provides an additional layer of protection, ensuring that your equipment can handle unexpected spikes without damage. The specific epoxy coated disc construction contributes to their long life use, making them a reliable choice for your electrical projects.
sourcingmap 10Pcs 75V Voltage Dependent Resistors
The sourcingmap 14D121K Resistors are designed to safeguard your equipment from transient voltage spikes. With a maximum allowable voltage of AC 75V and a varistor voltage of 120V ±10%, you can ensure effective protection for your devices. The robust construction features a specific epoxy-coated disc with radial leads, promoting long-lasting use. Additionally, the maximum clamping voltage of 200V and clamping current of 50A mean that these resistors can handle significant power surges, giving you peace of mind in your electrical projects.
sourcingmap 20Pcs 14D511K Varistors AC 320V
The sourcingmap 14D511K Varistors are designed to protect your equipment from transient voltage spikes. With a maximum allowable voltage of AC 320V and a varistor voltage of 510V ±10%, you can ensure reliable performance. The maximum clamping voltage of 845V and clamping current of 50A provide an added layer of safety, helping to prevent damage to sensitive electronics. The specific epoxy coated disc construction enhances durability, allowing for long-term use in various applications.
Hilitand 50 Pcs High Voltage Varistors
The Hilitand Varistors offer impressive features that enhance electrical safety and efficiency. They are designed to handle high voltage, ensuring that when the voltage exceeds a certain threshold, they act like a closed switch, protecting your devices. With good contact performance, these varistors maintain stable operation, giving you peace of mind. Their low voltage capability means they consume minimal current when not in use, effectively acting like an off switch. Additionally, their compact size makes installation and removal effortless, perfect for any project.
VARISTOR 250V 19.0J by EPCOS
The EPCOS Varistor B72207S0251K101 is a reliable component designed to protect your electronic devices from voltage spikes. With a voltage rating of 250V, it ensures stability and safety in circuits. Its compact size of 8 x 3 mm makes it easy to integrate into various applications without taking up much space. Additionally, with a power rating of 250 mW, this varistor offers efficient protection, helping you avoid costly repairs or replacements caused by surges. This device is a smart choice for anyone looking to enhance the durability of their electronic systems.
Sourcingmap 31-Piece Metal Oxide Varistor Set
The Sourcingmap Metal Oxide Varistors are essential components for managing electrical voltage. Each varistor measures 0.7 x 3 cm, making them compact and easy to integrate into various applications. With a maximum limited voltage of 470V, they provide reliable protection against voltage surges, ensuring the safety of your electronic devices. The 2.1 cm lead length allows for flexible installation options, making it convenient for you to set them up in tight spaces.
ViaGasaFamido 50Pcs MOV Varistors for Equipment
The ViaGasaFamido MOV Varistors are designed for reliability and performance. Made from high-quality ABS material, they ensure a long service life, making them a dependable choice for your electrical needs. When voltage is below the threshold, these varistors act like an off switch, allowing minimal current flow. However, once the voltage exceeds the threshold, they provide a surge of current, functioning effectively as a closed switch. Their compact size allows for easy installation and removal, making them user-friendly even for novices.
Frequently Asked Questions (FAQs)
1. What is a varistor used for?
Varistors are used to protect a circuit from high voltage surges. When a high voltage surge is applied to a circuit, the outcome is usually catastrophic to the circuit. A capacitor may be installed across the signal lines.
2. How do I check my varistors?
How do you test for varistor? Touch one meter probe to the free varistor lead and the other probe to the connected lead. Read the resistance on the meter. If it reads nearly infinite resistance, the varistor is still good.
3. What happens when a varistor fails?
Under different current conditions, failure modes include electrical puncture (see Figure 4), physical cracking (see Figure 5), and thermal runaway. Cracking happens because varistors are basically a ceramic material, and hitting them with a sharp high-amplitude surge is like hitting a dinner plate with a hammer.
4. What are varistors made of?
Metal Oxide Varistors, or MOV's are typically made from a small disk-shaped metal zinc oxide material. They are available in many values for specific voltage ranges. An MOV's voltage rating, called the “varistor voltage” is the voltage across a varistor when a current of 1mA is passed through the device.
During our varistor research, we found 44 varistor products and shortlisted 10 quality products. We collected and analyzed 3,150 customer reviews through our big data system to write the varistors list. We found that most customers choose varistors with an average price of £6.49.
The varistors are available for purchase. We have researched hundreds of brands and picked the top brands of varistors, including Uxcell, Hilitand, Best Price Square, ViaGasaFamido. The seller of top 1 product has received honest feedback from 20,026 consumers with an average rating of 4.8.
Harvey Wall was born and raised in Norwich. He mastered the art of tool production and finished at the prestigious Norwich University. His area of interest include cutting tools, abrasive finishing and power tools. Harvey is always looking for ways to improve the finesse of industrial tools via his myriads of researches. He also shares some of his experiences on many platforms while writing on tool products.