ROV20H121K-S

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When most people hear the term “varistor” they think of a device used to protect electronics from voltage surges. The ROV20H121K-S is a type of varistor that is specifically designed to protect high speed gate drivers from being damaged by overvoltage. It is a type of varistor – or voltage dependent resistor – that is used to protect devices from electrical overstress (EOS). It is a silicon based semiconductor that has an adjustable resistance that is dependent on voltage.

Varistors are commonly used in a variety of industrial and commercial applications where the potential for electrical overstress is present. The ROV20H121K-S is commonly used to protect radio frequency transistors in high speed control systems, as well as data transmission systems. It is also used to protect power systems, automated test equipment, and electric vehicle charging systems.

ROV20H121K-S Working Principle

The ROV20H121K-S is a unique type of varistor that is designed to be used as a clamping voltage surge suppressor. It works on the principle of controlling the maximum voltage to a specified level by either absorbing or dissipating the excess voltage. It is a semiconductor device that is made up of metal-oxide layers with a high resistance that is temperature dependent.

ROV20H121K-S devices are configured as an open circuit that disconnects the load from the input voltage when the voltage exceeds the threshold level. When the voltage rises higher than the threshold voltage, the varistor layers start to conduct due to the positive temperature coefficient of the resistance. This causes a portion of the excess voltage to be diverted and thus the process of dissipation or absorption of the excess voltage is completed.

Advantages of Using ROV20H121K-S

The ROV20H121K-S has several advantages over traditional varistors. For instance, due to its high temperature coefficient and low dynamic resistance, these varistors provide superior protection against overvoltage conditions. They also have a high thermal stability, which allows them to withstand high temperatures without failure. Furthermore, these varistors offer superior noise reduction.

In addition to providing superior protection against overvoltage conditions, ROV20H121K-S varistors are also ideal for high-speed data transmission. This is because of their low series resistance which helps reduce signal interference. They also offer excellent EMI/EMC attenuation, which helps reduce electromagnetic interference. Finally, these varistors are designed to withstand high frequencies, making them suitable for a wide variety of high-speed applications.

Conclusion

The ROV20H121K-S is a versatile, high performance varistor designed for use in high-speed gate drivers and other applications prone to electrical overstress. These varistors offer superior protection against overvoltage conditions, and their low series resistance helps reduce signal interference. They also offer excellent EMI/EMC attenuation, and their high thermal stability makes them suitable for a wide variety of high-speed applications.

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