ROV07-820K

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TVS (Transient Voltage Suppressor) devices are well known by the industry for their ability to swiftly and reliably protect sensitive electronic components from electrical transients. One device in particular, the ROV07-820K, is known for its high reliability and relatively low cost. This application note will discuss the application field of the ROV07-820K and its working principle to clarify how it can be used in order to ensure the best protection for electronics against transient voltages.

The ROV07-820K belongs to the group of Varistors, or Variable Resistors. Varistors are non-linear, three-terminal solid-state devices that limit electrical surges by using a voltage threshold. Such a device is able to limit the amplitude of transient voltages, typically in the range of 150V to 500V. The ROV07-820K is a selectable peak power Varistor device, designed for use in applications such as automotive, telecommunications, metering, industrial, medical and aviation. It can be used to provide protection against surges caused by electrostatic discharge (ESD), lightning and power cross-talk.

Varistors use a phenomenon called the Avalanche Effect in order to reduce surges in voltage. The Avalanche Effect is based on the principle of increasing current flow as the voltage increases, which results in a rapid increase in temperature. This phenomenon is able to react quickly to a transient surge instantaneously and dissipate it by converting the energy into heat. This is why Varistors are considered to be a highly reliable and cost effective way of protecting sensitive electronic systems from damage.

When using the ROV07-820K Varistor as a transient protection device, its two main parameters should be taken into consideration: clamping voltage and power dissipation. The device\'s clamping voltage is the maximum voltage that can be tolerated before the device begins to dissipate energy, and it is usually specified in the data sheet. The power dissipation value is the amount of power the device can dissipate before it begins to heat up to dangerous levels and it should be kept as low as possible. It should be noted that it is important to select the right value for both these parameters in order to ensure the best protection against transient voltages.

The ROV07-820K contains a ceramic element, which is a highly temperature-stable material that exhibits little variation in its electrical properties over a wide temperature range. The device also incorporates an external capacitance which helps to protect digital ICs from ESD transients. The ROV07-820K includes an integrated bypass diode in order to reduce the amount of stored energy during transient states and to help reduce the device\'s power dissipation. The diode rapidly redirects any stored energy to ground.

The ROV07-820K has a wide range of applications in which it can be used as a protection device against transient voltages. Its low cost and high reliability make it one of the most popular Varistor devices available on the market today. Although it is designed to withstand ESD transients, it can also be used to protect against lightning strikes and power cross-talk. The device is very easy to install and requires very little or no maintenance, making it an ideal choice for a wide range of electronics protection needs.

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