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Varistors for Surge Protective Devices

Varistors, also known as voltage-dependent resistors, are used as part of surge protective devices (SPDs). Varistors are designed to provide protection against transient overvoltages by limiting the voltage across the device to a safe level. Varistors are usually composed of sintered material consisting of zinc oxide grains embedded in a ceramic matrix. When an overvoltage occurs, the varistor exhibits a low resistance, allowing a large current to flow, thereby reducing the voltage across the device. Varistors are available in both AC and DC versions, with a variety of ratings to suit different applications.

Types of Varistors for MOV Surge Protection Device

Printing MOV Disk

Finished MOV Disk

What to Consider When Selecting Varistors for Surge Protective Devices

Clamping Voltage: Select a varistor with a clamping voltage that is below the maximum voltage the SPD is expected to encounter.

Energy Absorption: Select a varistor with an energy absorption rating that meets or exceeds the level of protection required.

Response Time: Choose a varistor with a response time that is fast enough to protect against high surge currents.

Size: Choose a varistor with a size that fits well with the SPD design and does not interfere with other components.

The Impact of Varistors on Surge Protection Performance

Varistors are an important component in surge protection systems, as they help to absorb and divert excess electrical energy away from sensitive electronic devices and circuits. A varistor is a semiconductor device that acts as a voltage-dependent resistor, meaning that its resistance changes with voltage, and can be used to protect against large voltage spikes, or transients. When a varistor is placed across the power supply line of a circuit, it acts as a 'clamp', limiting the voltage to a safe level and reducing the risk of a surge or spike damaging the circuit. Varistors can also be used in surge protection circuits to divert the excessive energy away from the protected device and prevent damage to it.

If you want to know more kinds of mov power protection products, please contact us.

Metal oxide varistor manufacturer TGE has focused on development and production of the metal oxide varistors movs for more than 30 years. TGE will strive to grow into a century -old enterprise, continuously innovate the development of MOV in the field of power and energy protection, and provide sustainable development solutions for our strategic partners and employees.

Localisation : No.53, Hong Guang Road, He Ping Industrial Park, San Qiao, Xi'an, China., 710086 xian,
Personne à contacter : xatge xatge, 029 84362608

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Varistors for Surge Protective Devices

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