KDZTR20B Discrete Semiconductor Products

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Diodes are in high demand in many fields of modern electronics. Among all diodes, Zener diode is a kind of diode with special features: it is able to operate in reverse breakdown region to regulate voltage. It plays an important role in providing reliable operation in DC power supplies and in electronic circuits when reverse voltage protection is required. The KDZTR20B is a popular Zener diode available in a single configuration of body type. In this article, the application field and working principle of the KDZTR20B are discussed in detail.

The KDZTR20B Zener diode is used in a wide range of voltage regulation applications, such as voltage regulation in power supplies, voltage switching under reverse bias conditions, and protection of circuits against overvoltage and transient voltage events. The device is also often used as a voltage clamping device in transient voltage suppressors, protecting the circuit or components where it is installed from harm due to unexpected high voltage events. The KDZTR20B Zener diode is also suitable for use as a voltage reference in comparator circuits.

The KDZTR20B is constructed in the same way as a regular silicon junction diode, but it has a higher doping level. This provides a greater reverse voltage drop and narrows the reverse breakdown region. It is a single type of body and has a rectangular shape. The maximum rated power of the KDZTR20B can be up to 500 mW, and its maximum forward voltage is 0.5 V. The Zener current is up to 50 mA, and the maximum reverse current is 1.5mA.

To work as a Zener diode, the KDZTR20B need to be connected to a power source in the reverse direction, which means the voltage applied to the diode should be the reverse of the normal forward bias. When the reverse voltage applied to KDZTR20B exceeds the predetermined breakdown voltage, the current through the diode will increase and the voltage will remain equal. This is the Zener effect and all Zener diodes are characterized by the Zener breakdown voltage, which is labeled in terms of the device partitions. The KDZTR20B breakdown voltage ranges from 6.6 V to 8V.

The Zener breakdown happens when electrons in the junction region have enough energy to “jump” the band gap, generating large number of electron-hole pairs. This gives rise to the reverse current and allows electrons to flow freely, causing the voltage across the junction to remain constant. Since the reverse saturation current is very small, the Zener diode itself serves as a current limiting element, allowing the Zener diode to regulate the reverse voltage precisely.

The KDZTR20B is a popular Zener diode that offers superior performance and long-lasting operation. It is an ideal choice for a wide variety of voltage regulation applications, transient voltage suppressor, and as a voltage reference in comparator circuits. The device is manufactured in a single body type, making it easy to install and maintain.

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