3d content central zener diode 6v
For example, a diode with a Zener breakdown voltage of 3.2 V exhibits a voltage drop of very nearly 3.2 V across a wide range of reverse currents. By contrast with the conventional device, a reverse-biased Zener diode exhibits a controlled breakdown and allows the current to keep the voltage across the Zener diode close to the Zener breakdown voltage. A Zener diode exhibits almost the same properties, except the device is specially designed so as to have a reduced breakdown voltage, the so-called Zener voltage.
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Unless this current is limited by circuitry, the diode may be permanently damaged due to overheating. When the reverse bias breakdown voltage is exceeded, a conventional diode is subject to high current due to avalanche breakdown. Temperature coefficient of Zener voltage against nominal Zener voltage.Ī conventional solid-state diode allows significant current if it is reverse-biased above its reverse breakdown voltage. They are also used to protect circuits from overvoltage, especially electrostatic discharge (ESD). They are used to generate low-power stabilized supply rails from a higher voltage and to provide reference voltages for circuits, especially stabilized power supplies. Zener diodes are widely used in electronic equipment of all kinds and are one of the basic building blocks of electronic circuits. Both breakdown types are present in Zener diodes with the Zener effect predominating at lower voltages and avalanche breakdown at higher voltages. Diodes with a higher Zener voltage have a more gradual junction and their mode of operation also involves avalanche breakdown. Some Zener diodes have a sharp, highly doped p–n junction with a low Zener voltage, in which case the reverse conduction occurs due to electron quantum tunnelling in the short space between p and n regions − this is known as the Zener effect, after Clarence Zener.
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Zener diodes are manufactured with a great variety of Zener voltages and some are even variable. A Zener diode is a special type of diode designed to reliably allow current to flow "backwards" when a certain set reverse voltage, known as the Zener voltage, is reached.