ROV20-301K

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Transient voltage suppressors (TVSs) are a family of devices used to protect components or devices from damaging electrical transients or surges. Among these devices are varistors, metal oxide varistors (MOVs) and suppressors. Each has its own advantages and the choice of which to use depends on a number of criteria. In this study, we will focus on ROV20-301K, a kind of MOVs.

ROV20-301K Application Field

ROV20-301K is designed mainly to protect against transient single events like electrostatic discharge (ESD), lightning and machine generated transients. It is suitable for applications where maximum transient protection in a variety of circuits is required, including I/O, data, and telecom. Its operating temperature range is from -55°C to +125°C and it is UL listed and CSA approved.

ROV20-301K Working Principle

ROV20-301K is a metal oxide varistor (MOV), a voltage-dependent resistor made up of two electrodes made from a metal oxide material, usually made of zinc oxide. This metal oxide material has a property called "nonlinear conduction." That is, its resistance to current or voltage changes drastically when the voltage or current changes. The resistance of MOVs depends on the composition of the metal oxide material and the thickness of the material.

When the MOV is subjected to a voltage above its rated clamping voltage, the nonlinear conduction of the MOV will reduce its resistance and allow the excessive voltage to be diverted away from the component or device being protected. This will reduce the voltage until it drops back to a safe level. The MOV is limited to conducting a certain amount of current; when the MOV reaches its current limit, it acts as an open circuit. This prevents it from becoming damaged by excessive current.

MOVs are often used to protect vulnerable electronic components and circuits from excessive voltage or current. They can be used as surge protection devices in a variety of applications, including power distribution networks, telecommunication and data systems.

Conclusion

ROV20-301K is a metal oxide varistor (MOV) designed to protect against transient single events like electrostatic discharge (ESD), and lightning and machine generated transients. It has a wide temperature range, is UL listed and CSA approved, making it suitable for a variety of applications. Its working principle is based on its nonlinear conduction property, which allows it to divert current away from components or devices when necessary. It can be used as a surge protection device, helping to protect vulnerable electronic components and circuits from damage.

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