What is a bidirectional Zener diode?
Technically a single zener diode is bi-directional , however the functionality of the Zener diode in unidirectional and is therefore called unidirectional. That being said there are Bi-Directional Diodes. These devices are actually made using two diodes.
What are bidirectional diodes used for?
Therefore, when only a positive voltage is applied to the signal line to be protected during normal operation, unidirectional TVS diodes can be used to absorb both positive and negative ESD events. When both positive and negative voltage are applied to the signal line to be protected, use bidirectional TVS diodes.
Can a Zener diode conduct in both directions?
A Zener diode is a silicon semiconductor device that permits current to flow in either a forward or reverse direction.
What is meant by Zener breakdown?
The Zener breakdown can be defined as the flow of electrons across the p kind material barrier of the valence band to the evenly filled n-type material conduction band. The Zener breakdown generates electrons whereas the avalanche generates holes as well as electrons.
How is a Zener diode different from a regular diode?
whereas zener diode allows the conduction in both directions.
Why are Zener diode used as voltage regulator?
Due to this feature, it is used as a voltage regulator in d.c. circuit. The primary objective of the Zener diode as a voltage regulator is to maintain a constant voltage. Let us say if Zener voltage of 5 V is used then, the voltage becomes constant at 5 V, and it does not change. Nov 11 2019
How can a Zener diode be used as a voltage regulator?
Zener diodes are widely used as voltage references and as shunt regulators to regulate the voltage across small circuits. When connected in parallel with a variable voltage source so that it is reverse biased, a Zener diode conducts when the voltage reaches the diode’s reverse breakdown voltage.
How can I identify Zener diodes?
Zener diodes may have a dark plastic casing with a dark stripe , which is the same coloring as that of other diodes. Many other zener diodes are copper colored, and are enclosed in a glass casing with a white or black or blue stripe. Still others may have metal casings.
