Protecting your sensitive electronic equipment from voltage surges is crucial for longevity and reliable performance. Varistors act as a vital defense, absorbing excess voltage spikes before they can damage your devices. Selecting the appropriate varistor ensures optimal protection and peace of mind for your valuable electronics.
Looking for the best Varistors?
Discover now our comparison of the best Varistors. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Varistors are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Varistors in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.
- 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.
- Easy to store: Provide a box for easy management and storage.
- More values: Provide 15 commonly used Varistor Resistors values to help you more convenient for protecting equipment against transient voltage spikes
- 【Dimension】 - Model:14D271K;Maximum impulse current:4500A;Rated power:0.6W;Maximum energy:70J;Varistor voltage:270V;Foot length:24mm/0.94";Foot distance(F±0.8):7.5mm/0.3"
- 【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
- 【Advantage】-Monolithic capacitors are compact in structure and can provide high-capacity capacitors with excellent moisture resistance and reliable performance
- 【Application】 -Voltage-dependent resistors are widely used in the resonance, coupling, filtering, and bypass of electronic precision instruments and various small electronic devices
- Littelfuse
- Intended Use: Industrial, Commercial and Automotive Use.
- 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
- Construction: Made from durable metal materials, this varistor offers excellent electrical conductivity and stability, ensuring long-lasting performance even in demanding environments.
- Wide Application Range: Ideal for home appliances and industrial devices, this varistor handles high-energy surges, making it essential for circuit protection in critical systems.
- The NTC thermistors are reliable and stable, with wide range of over-current control. With small size and large power, they have strong capacity to inhibit surge current
- Large material constant (B value), with small residual resistance. Thermal shock resistance, with wide range of operating temperature: -55°C to 200°C
- Widely used for controlling the inrush current of motor, heaters, bulb voltage stabilizer, electronic energy-saving lamp, electronic and other electronic installations
- 10 Resistance Values: 3D-25, 5D-7, 5D-9, 5D-11, 5D-15, 8D-9, 10D-9, 10D-11, 20D-9, 47D-15; Package Contents: 81 x NTC Thermistors with Package Box
- NOTE: The thermistor cannot be used in parallel in the circuit
- Brand New Condition: Unused and in perfect working order.
- Fast switching speed, large power dissipation, good current performance
- Convenient for DIY and electrical appliances.
- All the transistor is in the order of the paper marked on box ,easy to find what you need.
- If you have any question, please contact us. We will offer an excellent after-sell service.
- Epcos S20K275
- 275Vac 350Vdc 630pF
- 20mm disk, Lead spacing:10mm
- 215J 710V Clamp
- Package of 10 pieces
- Epcos
- S20K275
- 275Vac 350Vdc 630pF
- 20mm disk, Lead spacing:10mm
- Package of 6 pieces per Order
- [Note]: When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, which is equivalent to a resistor with an infinite value. Equivalent to a switch that is off.
- [lectronic Component ]: When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, which is equivalent to an infinitely small resistance, equivalent to a closed state switch
- [Small Size]: Small body, easy to install and remove.
- [Premium Material]: Adopted of high quality electronic components, and accuracy process, ensure for the durability
- [Stable Performance]: The varistor has good contact performance, ensure stable working
- Compact Design: This varistor features a sleek and minimalist form factor, making it an ideal choice for space-constrained applications. Ratings are 56V at 250A. Pack of 5
- Reliable Protection: Designed to safeguard electronic circuits from voltage surges, this varistor provides dependable overvoltage suppression.
- Versatile Application: Suitable for a wide range of electronic devices, this varistor can be seamlessly integrated into various circuits.
- Durable Construction: Manufactured with high-quality materials, this varistor ensures long-lasting performance and reliability.
- Precise Specifications: With its carefully calibrated voltage ratings and response times, this varistor offers precise and consistent performance.
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Last update on 2026-04-16 / Affiliate links / Images from Amazon Product Advertising API
How to Choose the Best Varistors
Understanding Varistor Basics
Varistors, also known as voltage-dependent resistors (VDRs), are semiconductor devices designed to protect electrical circuits from overvoltage transients. They exhibit a high resistance at normal operating voltages, effectively doing nothing. However, when a voltage spike occurs, their resistance dramatically decreases, diverting the excess energy away from the protected circuit.
Key Specifications to Consider
- Clamping Voltage: This is the maximum voltage that the varistor will allow to pass through to the protected circuit during a surge. It should be chosen to be slightly above the normal operating voltage but low enough to protect the equipment.
- Energy Rating (Joules): This indicates how much energy the varistor can absorb during a surge event. Higher energy ratings mean the varistor can handle larger and more frequent surges.
- Response Time: Varistors react to surges very quickly, typically in nanoseconds. A faster response time offers better protection.
- Leakage Current: This is the small amount of current that flows through the varistor at normal operating voltage. Lower leakage current is generally preferred to avoid unnecessary power consumption.
Types of Varistors and Applications
The most common type is the metal oxide varistor (MOV). MOVs are widely used in power strips, surge protectors, and directly within electronic devices to safeguard against lightning strikes and utility power fluctuations. Other types exist for specific niche applications, but MOVs offer a good balance of performance and cost for most consumer electronics protection needs.
Installation and Placement
Proper installation is paramount for effective protection. Varistors should be placed as close as possible to the equipment they are protecting, especially at the point where power enters the device or system. Ensure that the varistor is rated appropriately for the voltage and current of the circuit it is safeguarding. Always follow manufacturer guidelines and safety precautions during installation.
