ROV10H220L-2

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TVS-Varistors, MOVs, are components that help protect sensitive electronic circuits from damage caused by electrical transients or surges in power supply. One of the popular model in this category is ROV10H220L-2. This article will discuss its application field and working principle.

The ROV10H220L-2 varistor is commonly used in industrial applications that require reliable power supply protection. It is mainly used to absorb transient surge voltages and protect electrical circuits and equipment. This varistor comes with 2mm diameter and is made of ceramic material with nonlinear resistance characteristics. Typically, ROV10H220L-2 varistors are designed to work on a nominal voltage of 220V and a peak surge current of 27A.

The working principle of a varistor relies on the principle of nonlinear resistance. This means that the resistance of these components change when an alternating current is applied to them. This phenomenon is known as the \'varistor effect\'. When a voltage is applied to the Varistor, the resistance of the Varistor increases. This maximized resistance then dissipates the voltage of the electrical surge while allowing the desired current to pass through.

In operation, the ROV10H220L-2 varistor will absorb a wide variety of surge current, while protecting the electronic circuit or equipment. As the surge current is dissipated, the voltage that is applied to the varistor will gradually decrease, and the resistance of the varistor will change accordingly. In other words, the resistance increases as the surge voltage increases, and decreases as the voltage decreases. This ensures that the varistor provides protection against severe over-voltage situations.

Additionally, the varistor is also designed to reduce the voltage of an incoming surge below the nominal operation voltage of the electronics equipment, thus preventing it from becoming damaged due to over-voltage. This is accomplished by the nonlinear characteristics of the varistor, which means that during higher surge voltages the resistance of the varistor is much higher than during normal operation. The result is effectively a controlled reduction in the voltage of the surge.

In conclusion, the application field of the ROV10H220L-2 varistor is mainly for industrial applications that require reliable power supply protection. It is designed to provide protection against transients or surges in power supply and to reduce voltage of an incoming surge below the nominal operation voltage of an electronics equipment. It utilises the principle of nonlinear resistance to achieve its goals. The varistor is thus an invaluable tool in protecting delicate electronics from damage by electrical surges.

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