MOV-20D511KTR

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TVS-Varistors, MOVs are used in different industries with different purposes, such as telecommunications, electric vehicle, power plants, and so on. MOV-20D511KTR is a type of the TVS-Varistors, MOVs used in different fields. This article describes its application field and its working principle.

Application Field of MOV-20D511KTR

MOV-20D511KTR is primarily used for the protection of power components against overvoltage caused by lightning, switching and induced transients. MOV-20D511KTR is commonly used in various applications, such as industrial power system, residential power system, and automotive power system. In industrial power system application, MOV-20D511KTR can be applied to the protection of conductors, circuits, and machines that operates in an indoor environment or a small enclosure. In residential power system application, MOV-20D511KTR is used to protect the sensitive equipments from overvoltage caused by the contact of the outside lightning surge. Another wide application of MOV-20D511KTR is in automotive power system, where it is used to protect the battery line, wiring, and cables from the lightning surge and transients. Additionally, MOV-20D511KTR is also used in telecom lines, intelligent motor control, medical equipments, and military systems.

Working Principle of MOV-20D511KTR

MOV-20D511KTR is a Metal Oxide Varistor(MOV). It is a passive electronic components with a non-linear current-voltage characteristic, which behaves like an unregulated zener diode. When the voltage applied to MOV-20D511KTR is lower than its clamping voltage, the MOV-20D511KTR has a low impedance and can conduct current. When sufficient overvoltage is applied to MOV-20D511KTR, the MOV-20D511KTR has a high-impedance and blocks the current. Hence, it can protect component from the overvoltage. MOV-20D511KTR is made of zinc oxide grains, which are mixed with plastic to form a disk. The zinc oxide grains are responsible for providing the non-linear ports. During its operation, the zinc oxide grains inside the MOV-20D511KTR can absorb huge amount of energy and dissipate it as heat, thereby protecting the other components connected to it from the overvoltage. After a while, due to the mild temperature coefficient of the zinc oxide grains, their behaviour will return to normal, and the MOV-20D511KTR can perform its duties again.

Due to its great features, MOV-20D511KTR is widely used in different application field. Moreover, its simple working principle also makes it easy to use and maintain. Therefore, it is highly recommended to be used in power components for protection against overvoltage.

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