"Varistors" Pronounce,Meaning And Examples

"Varistors" Meaning

A varistor is a type of voltage-dependent resistor, which is a device that changes its resistance depending on the voltage applied to it. It is also known as a voltage-dependent resistor or a voltage-sensitive resistor.

Varistors are used in a variety of applications, including:

1. Surge protection: Varistors are often used in surge protectors and voltage spikes, as they can absorb or dissipate excess voltage.
2. Power line conditioning: Varistors can be used to regulate voltage levels and reduce the impact of power fluctuations on connected devices.
3. Safety devices: Varistors are used in safety devices, such as GFCI outlets and circuit breakers, to protect people from electrical shock.
4. Electronic circuits: Varistors are used in electronic circuits to regulate voltage levels and prevent overvoltage.
5. Industrial applications: Varistors are used in a variety of industrial applications, including in the production of semiconductors, in the automotive industry, and in medical equipment.

There are different types of varistors, including:

1. Metal oxide varistors (MOVs): These are the most common type of varistor and are made from metal oxides such as zinc oxide or tin oxide.
2. Silicon carbide varistors: These are made from silicon carbide and are more conductive than MOVs.
3. Zinc oxide varistors: These are made from zinc oxide and are widely used in fuse-based protection applications.
4. Metal-film varistors: These are made from metal films deposited on a substrate and are used in high-frequency applications.
5. Ceramic varistors: These are made from ceramic materials and are used in high-voltage applications.

In summary, varistors are an important component in many electrical and electronic systems, providing a way to regulate voltage levels and prevent damage to devices from overvoltage.

"Varistors" Examples

Usage Examples of the Word "Varistors"

Other terms for varistors are voltage-dependent resistors (VDRs), voltage-sensitive resistors (VSRs), or pressure-sensitive resistors (PSRs). The most common types are:

1. Thermal Gradient

Varistors, particularly the metal oxide type, are used in surge arresters due to their ability to exhibit a sharp increase in their resistance when exposed to voltage spikes. This characteristic prevents damage from electrical discharges.

2. Metal Oxide Varistors

Metal oxide varistors (MOVs) are one of the most common types of varistors.
They consist of a conductive ceramic material with a small metal oxide content, typically zinc oxide.
MOVs are widely used in electronic circuits to protect against transient voltage surges.

3. Applications of Varistors

Varistors are used in a variety of applications:

1. Overvoltage protection: MOVs are used in power supplies, surge protectors, and other circuits that can be ruined by overvoltage conditions.
2. Power conditioning modules: These varistors regulate the voltage supplied to sensitive electronic circuits.
3. Phone ICs: In mobile handsets, varistors handle line transient voltage.
4. Computer parts: They protect personal computers from surges generated by inductive loads.

4. Automotive and Aerospace

1. Automobile electrical systems: Ceramic varistors regulate extremely powerful engines in CVTs and flywheels.
2. Aerospace Industry: High-power aircraft electrical systems and electromagnetic pulses are managed with MOV benefits.

5. Analyzing Electronic Devices with Varistors

By incorporating varistors in the circuits, it's possible to analyze the variability of the resistance value during operation, including resistance measured versus applied voltage.