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Metal Oxide Varistors (MOV)


To find the best solution for over voltage and surge protection of AC and DC electrical components and electronic systems. Explore our range of Metal Oxide Varistors (MOVs) available from the team at Fastron Electronics.

At Fastron Electronics, we stock Metal Oxide Varistors in a range of sizes, voltages and varieties. To ensure the best products for any application, we also ensure the brands we stock are the very best.

Our range of MOVs come from leading names such as Varsi Doo and Siemens, among others. For any size, voltage or type not listed, please consult our sales team to find out about availability and a custom quote.

You can trust all of the products provided by Fastron Electronics. As well as the best products on the market, we offer a range of technical support, engineering services and solutions for you based on decades in the local market.

Explore our range of Metal Oxide Varistors on this page or contact us today to learn more.


FAQ's


1. What is a metal oxide varistor (MOV) and how does it work?
A metal oxide varistor (MOV) is a protective device used to safeguard electrical and electronic systems from overvoltage or surge conditions. It works by clamping excessive voltage and diverting the surge current away from sensitive components, thereby preventing damage.
2. Where can I buy a reliable varistor or metal oxide varistor in Australia?
You can buy high-quality metal oxide varistors (MOVs) in Australia through Fastron Electronics. We stock a wide range of MOVs from trusted global brands and offer engineering support to help you select the right product for your needs.
3. What is the difference between a metal oxide varistor and a regular varistor?
A metal oxide varistor (MOV) is the most common type of varistor, specifically designed for reliable surge and overvoltage protection in AC and DC circuits. It uses metal oxide materials to provide rapid and effective clamping performance.
4. How does a varistor protect electronic equipment from voltage spikes?
A varistor protects equipment by responding quickly to voltage spikes. When voltage exceeds a certain threshold, the varistor becomes conductive and diverts the excess energy, preventing the spike from reaching sensitive electronic components.
5. Can I use a metal oxide varistor for surge protection in power supplies?
Yes, a metal oxide varistor is ideal for surge protection in power supplies. It effectively absorbs and redirects transient voltages, ensuring that your electrical components remain protected during voltage fluctuations.
6. What are the applications of varistors in electrical circuits?
Varistors are used in a wide range of applications, including power supply protection, AC/DC systems, and electronic circuits. They are essential in protecting devices from transient voltage surges and electrical spikes.
7. What voltage ratings are available for metal oxide varistors?
Fastron Electronics offers metal oxide varistors in a variety of voltage ratings and sizes to suit different applications. If you don’t find what you need online, our team can assist with custom solutions and availability.
8. How do I choose the right varistor for my electrical system?
To choose the right varistor, consider your system’s operating voltage, expected surge levels, and response time requirements. Fastron Electronics offers expert advice and product support to help you select the most suitable MOV for your application.
9. What are the benefits of using a metal oxide varistor in surge protection?
Using a metal oxide varistor ensures fast and reliable protection against voltage surges. MOVs help extend the lifespan of electronic components and prevent costly damage by clamping excess voltage effectively in AC and DC circuits.
10. Can a varistor be used in both AC and DC circuits?
Yes, varistors—especially metal oxide varistors—are suitable for both AC and DC circuits, providing versatile protection against transient voltage conditions in a wide range of electrical and electronic applications.
11. How do I install a varistor in a surge protection device?
A varistor is typically installed across the power lines or between line and ground in a surge protection device. It’s important to follow correct installation practices and consult an expert for selecting and positioning the MOV effectively.
12. What is the typical lifespan of a metal oxide varistor?
The lifespan of a metal oxide varistor depends on the frequency and intensity of voltage surges. With proper usage, quality MOVs from Fastron Electronics are designed for long-term performance in demanding electrical environments.
13. Are metal oxide varistors compliant with Australian electrical standards?
Yes, metal oxide varistors offered by Fastron Electronics are sourced from reputable global brands and are compliant with relevant Australian electrical standards, ensuring reliable and safe performance.
14. What is the maximum energy absorption capacity of a varistor?
The energy absorption capacity of a varistor varies by model and application. Fastron Electronics provides MOVs in various types and ratings to meet the energy dissipation requirements of different electrical systems.
15. Can I use a metal oxide varistor in high-voltage electrical systems?
Yes, metal oxide varistors are available in high-voltage ratings suitable for use in high-voltage electrical systems. Fastron Electronics offers a wide selection, and our team can assist in sourcing or customising the right MOV for your setup.
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