A Varistor is a voltage-dependent, non-linear resistor whose resistance changes significantly with applied voltage. The term varistor is derived from “variable resistor”, but unlike potentiometers or rheostats, its resistance varies automatically with voltage, not mechanically. Varistors are primarily used for over-voltage protection. Under normal operating voltage, a varistor behaves like a very high resistance device. […]
A power diode is a semiconductor device specifically engineered to conduct large currents and withstand high reverse voltages in power electronic circuits. It is fundamentally a PN junction diode, but its internal structure, doping profile, and packaging are optimized for high-power operation rather than low-level signal processing. In power electronic systems, power diodes play a […]
A TVS (Transient Voltage Suppression) diode is a specialized semiconductor device used to protect electronic circuits from high-voltage transients such as electrostatic discharge (ESD), lightning surges, and switching spikes. It responds extremely fast and clamps overvoltage to a safe level before they damage sensitive components. Modern electronic systems are highly sensitive to voltage spikes caused […]
The avalanche diode is a specialized type of semiconductor diode designed to operate in the reverse breakdown region without getting damaged. It plays a critical role in protecting electronic circuits from high voltage spikes and is commonly used in voltage regulation and surge protection applications. This article explores the avalanche diode in depth, from its […]
Here we will discuss the VI characteristics of Zener Diode, its working as a voltage regulator and some applications. Zener Diode is a special purpose PN junction diode its construction is similar to a conventional PN junction diode. It has some unique characteristics which we will discuss. Overview of Zener Diode as Voltage Regulator: Zener […]