The Zener diode is a popular electronic component that is designed to manage voltage levels within electronic circuits. It operates in reverse-biased conditions, enabling it to regulate voltage and protect sensitive components from overvoltage damage. The Zener diode’s key feature is its ability to maintain a precise voltage level across its terminals, even when subjected to changes in current flow. This makes it a vital component in power supplies, voltage regulators, and surge protection systems. The diode is named after the Zener breakdown effect, which occurs when the reverse voltage across its terminals exceeds a specific value. At this point, the diode begins conducting current, preventing the voltage from increasing further and maintaining a constant voltage across the terminals. The Zener diode is available in many different voltage ratings, allowing engineers to select the appropriate diode based on their specific application requirements. Its reliability, compact size, and low cost have made it a popular choice in numerous industries, including telecommunications, automotive, and consumer electronics. In summary, the Zener diode is an essential component that provides voltage regulation and overvoltage protection in electronic circuits. Its ability to maintain a constant voltage across its terminals makes it a versatile tool in various applications.