CZRUR52C3V9-HF

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Diodes - Zener - Single

The CZRUR52C3V9-HF is a single Zener diode that can be used to protect circuits against overvoltages caused by transient voltage events or to provide a reference voltage. This diode is a part of the RUR lineup of silicon planar diodes from Vishay, capable of handling voltages up to 500V and currents up to 1A.

Application Field

A Zener diode is a type of rectifying diode that allows current to flow only in the reverse direction, unlike an ordinary diode. Zener diodes are commonly used for voltage regulation purposes, such as producing a reference voltage for circuits, and for protecting circuits against overvoltage events.

The CZRUR52C3V9-HF is an ideal choice for such scenarios due to its low reverse leakage current of 1µA and low noise level. It can also be used as a clamping device, which is useful for protecting electronic equipment against voltage transients.

The CZRUR52C3V9-HF is also well-suited to use as an attenuator, due to its low forward voltage drop of 0.2V. It can help reduce the transmit power of electronic systems without causing any form of signal distortion. This makes it ideal for use in radio transmitters and other such applications.

Working Principle

The CZRUR52C3V9-HF operates on the principle of Zener Tunneling. This is a phenomenon which occurs when the voltage across the diode exceeds the Zener voltage breakdown value. When this occurs, electrons will tunnel from the p-type to the n-type region of the diode, resulting in a large amount of current flowing through the diode.

In the case of the CZRUR52C3V9-HF, the breakdown voltage is 3.9V. When this voltage is exceeded, the current flowing through the diode increases exponentially, thus providing the protection and reference voltage necessary for the application.

This diode also features a highly efficient avalanche breakdown mechanism, which limits the amount of current flowing through the diode in the event of an overvoltage. This provides additional protection against voltage surges, helping to protect connected electronic components.

Conclusion

The CZRUR52C3V9-HF is a versatile Zener diode that can be used in a variety of situations, thanks to its range of features. Its low reverse leakage current, low noise level and low forward voltage drop make it a great choice for many applications, such as voltage regulation, protection against voltage transients, and attenuation of radio signals. It operates on the principle of Zener tunneling, and also features a highly efficient avalanche breakdown mechanism to provide extra protection against voltage surges.

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