Varistors are components that protect sensitive electronics from voltage spikes. They are designed to respond quickly to transient overvoltage by clamping and dissipating the excess energy. Varistors by ZKHK provide reliable protection against voltage transients and surges in a wide range of applications.
Varistors are critical components in surge protection devices (SPDs). They absorb and divert excess energy from incoming surges, such as those caused by lightning strikes. SPDs are designed to protect electrical equipment from damage due to voltage spikes. The varistor acts as a voltage-dependent resistor, providing a low resistance when the voltage is below its breakdown voltage, and a high resistance when it is above. The high resistance prevents the surge from reaching the protected equipment. Varistors also have fast response times, so they can respond quickly to sudden changes in voltage.
Increase the varistor's heat dissipation capacity by adding heat sinks or cooling fans.
Use high-grade varistors with larger electrodes that can carry more current.
Reduce the leakage current by increasing the insulation between the varistor and its surrounding environment.
Increase the varistor's resistance by increasing its temperature.
Choose appropriate varistor ratings that meet the requirements of the specific application.
Reduce the noise level by using a snubber network with the varistor.
Increase the frequency of the applied current to reduce losses due to thermal resistance.
Use low-impedance power supplies and long power lines to reduce switching losses.
Increase the capacitance of the varistor to reduce the noise level.
A varistor is a type of electrical component used for surge protection. When selecting the right varistor for an application, it is important to consider the desired voltage, current, and energy rating of the varistor. Additionally, the desired varistor should be able to handle the peak voltage, peak current, and frequency of the application. Furthermore, the size of the varistor should be considered when selecting the right varistor for an application. Finally, the environmental conditions of the application should be taken into account when selecting a varistor.