Varistors (results: 427)

Varistors

Varistors are crucial components used to protect electrical and electronic devices from damage caused by excessive voltage. Their design and function allow them to absorb energy without risking damage to the equipment. Varistors come in various specifications, so it is essential to choose the right one for your system's needs.

Varistor as Protection for Electrical and Electronic Devices

Varistors are vital components used in many electronic and electrical devices. Their main function is to protect against voltage surges that may be caused by excessive electrical voltage. Such dangerous surges can occur, for example, during a thunderstorm. Lightning can cause unprotected equipment to fail. However, using a varistor as protection can help avoid such failures.

The principle of operation of a varistor is relatively simple. It acts as a resistor whose resistance value significantly decreases when the voltage exceeds a specified threshold. This is why varistors are described as having nonlinear resistance, which can range from hundreds of kilohms at low voltages to just a few ohms at high voltages.

What Does a Varistor Do?

Given the operation principle described above, varistors provide effective protection for electrical devices. When the electrical voltage reaches dangerous levels for the equipment, the varistor absorbs the energy, leading to either disconnection or burning out of the varistor, thereby safely shutting down the device without exposing it to harmful operating conditions.

Due to their importance in ensuring safe operation of equipment, varistors are used by manufacturers of various devices and by individuals constructing their own electronic circuits. These components can be found in everything from phones and modems to televisions. Varistors are also used in lightning arresters and as protection for high-voltage lines.

How Are Varistors Made?

Varistors are produced by pressing and sintering powdered grains of zinc oxide, bismuth, and other materials. The specific composition of each component affects its operating parameters and is determined by the manufacturer. The resulting discs are metalized, coated, marked, and fitted with leads. The components produced in this way are then made available for sale. Specific varistors are described in detail by the store to ensure they meet the needs of the respective system.

Varistors – A Store with a Wide Range of Reliable Components

Now that you understand how varistors are constructed, their purpose, and how they are manufactured, it is important to know how to select the right component for your system. Before purchasing, check the parameters such as power rating and maximum voltage, as well as the mounting type. We offer both through-hole varistors and SMD varistors. Each type has different operating parameters and is suitable for different installations. Our store's extensive selection ensures you will find varistors that meet all your needs.