Zener Voltage (Vz): This is the voltage at which the Zener diode begins to conduct in the reverse bias direction. Once the reverse voltage across the Zener diode reaches its Zener voltage, a stable and predictable voltage drop occurs.
Breakdown Region: Zener diodes are designed to operate in the breakdown region, also known as the Zener breakdown or avalanche breakdown region. In this region, a small change in reverse voltage leads to a significant change in current.
Voltage Regulation: Zener diodes are commonly used as voltage regulators in electronic circuits. When connected in reverse bias across a power supply, they can help maintain a constant output voltage, compensating for variations in the input voltage.
Applications: Zener diodes find applications in various electronic circuits, such as voltage regulators, voltage references, and overvoltage protection devices. They are often used to stabilize and regulate voltage in electronic devices.
Symbol: The schematic symbol for a Zener diode resembles that of a standard diode, but it includes a unique symbol for Zener breakdown.
Zener diodes are available in a range of Zener voltages, and selecting the appropriate Zener diode with the desired breakdown voltage is crucial for the intended application. They play a crucial role in maintaining stable voltage levels in electronic circuits and protecting sensitive components from overvoltage conditions.