When designing such a circuit, you have to know the current (or range of currents) you will be drawing from this regulated voltage. We have discussed the application of Zener diode as voltage regulator and now we will discuss the other two points. Zener Diode checking. Zener Diode. A diode is a semiconductor device which conducts in one direction only. This is considered as the basic application of Zener diode. The Zener voltage of a standard diode is high, but if a reverse current above that value is allowed to pass through it, the diode is permanently damaged.Zener diodes are designed so that their zener voltage is much lower – for example just 2.4 Volts. Zener diode definition – also called stabilizer or stabilistor.. for an amplifier stage), or as a voltage stabilizer for low-current applications. When the diode is reverse-biased, this intense electric field causes the electrons to become ionized. The Zener diode is a diode that is employed specifically to operate in reverse bias. A zener diode can be used as a voltage regulator to provide a constant voltage from a source whose voltage may vary over sufficient range. This article covers the Zener diode definition, working principle, characteristics, and applications. Hence in this way the voltage is limited across the load. The zener is a highly doped, special pn (semiconductor) junction designed to drive in the reverse direction (reverse biased diode) when a certain specified voltage, called the zener voltage or voltage, is reached . In a Zener diode, the p-n junction is heavily doped, which causes it to become very narrow and to generate an intense electric field. From the I-V characteristics curve above, we can see that the zener diode has a region in its reverse bias characteristics of almost a constant negative voltage regardless of the value of the current flowing through the diode. But the voltage and sharpness of the knee voltage are not clearly defined as in Zener … Zener diode is a reverse-biased heavily doped p-n junction diode that allows current to flow in a forward direction and it also allows to flow current in reverse direction but only if the voltage is above a certain level also known as the breakdown voltage. The flow of current in this diode will be in a forward direction or in reverse direction. A Zener diode voltage regulator is highly dependent on the load current. But since there are so many types of a diode, how to differentiate between them and most importantly which one to use according to its requirement in our circuit.Difference between Zener diode and normal Rectifier diode Zener diodes can be connected in series for use at higher voltages, resulting in higher regulated voltages in series. The Diode and Zener diode are different from each other with respect to their symbols, construction, operations, and applications, a major difference between diode and Zener diode is the electric current conduction normal diode can conduct in one direction whereas Zener diode is able to conduct in both forward and reverse direction. A diode is a passive device which allows the flow of current in one direction only. What Is A Zener Diode When the reverse bias voltage on a normal crystal diode is increased, a point known as Knee point is reached at a voltage known as breakdown voltage, when the reverse current increases sharply to a high value. When a reverse current above the Zener voltage passes through a Zener diode, there is a controlled breakdown which does not damage the diode. The Zener diode is a special diode, that enables the current to flow not only from positive terminal (anode) to the negative terminal (cathode), but also in the opposite direction. 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