ROV20H330M

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Varistors, MOVs, and other transient voltage suppressors (TVSs) represent an important line of defense protecting sensitive electronic components from damage due to surge currents and overvoltages. The ROV20H330M is a particular example of such a device that offers a wide capability for safeguarding circuits, making it suitable for a variety of uses. In this article, we will discuss the application fields and working principles of the ROV20H330M.

Application Field

The ROV20H330M is a radial lead TVS diode designed for transient overvoltages and surge protection in a wide range of applications, ranging from industrial automation equipment to consumer electronics. It has been proven to be suitable for securing circuits in automotive and medical electronics, LED lighting systems, telecommunications equipment, power supplies and power distribution networks. The device is also suitable for applications in aerospace and military applications.

The ROV20H330M offers a broad range of voltage clamping capabilities, from 28V to 330V, and is able to absorb currents of up to 20A. A wide operating temperature range of -55°C to +150°C and a maximum transient surge current of 40A make it an ideal choice for applications in harsh and hostile environments. Furthermore, its wide choice of voltage clamping levels makes it suitable for use with a variety of semiconductor components.

Working Principle

As a transient voltage suppressor, the ROV20H330M operates via the principle of avalanche breakdown. This process occurs when a reverse-biased PN junction in a semiconductor device is exposed to a voltage that exceeds its breakdown voltage. When this occurs, electrons within the junction become accelerated to high speeds and crash into other electrons and holes tightly packed into the material, releasing even more free electrons and holes. This results in an avalanche multiplication of carriers which rapidly increases the current flow through the junction, thus dissipating the transient overvoltage.

It is during this process that the ROV20H330M performs its protective function. When a surge current enters the device, the avalanche breakdown process is triggered, causing the current through the PN junction to increase greatly. This large inward current serves to limit the magnitude of the incoming surge, preventing it from reaching dangerous levels and protecting the sensitive circuitry further down the line. Once the surge has passed, the PN junction instantly recovers and the device is ready to protect again.

Conclusion

The ROV20H330M is an excellent example of a transient voltage suppressor (TVS) that offers a wide range of uses in a variety of applications. Its ability to provide protection from a wide range of surge currents, transient overvoltage levels, and temperatures makes it ideal for applications in industrial automation, automotive electronics, power distribution networks, and more. Its ability to operate via the principle of avalanche breakdown also proves to offer reliable and effective protection from damaging surges and overvoltages, ensuring that sensitive electrical components remain secure.

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