What is a varistor and its function 1

Varistors are semiconductor electronic components whose resistance values vary with the voltage applied to them. When the voltage applied to the AMS1117-3.3 varistor reaches a certain threshold, its resistance value will sharply decrease, allowing more current to pass through. It is usually made of semiconductor materials such as zinc oxide (ZnO) or silicon carbide (SiC), which change their conductivity under high electric fields.diode

The main function of varistors is to protect circuits from overvoltage damage, and they are very useful in the field of overvoltage protection. For example, they can be used to protect sensitive electronic devices from transient overvoltage caused by power line fluctuations, lightning strikes, electrostatic discharge, and other factors. Here are some key applications and functions of varistors:diode

1. Overvoltage protection: Parallel varistors on power or signal lines can limit voltage in the event of an overvoltage event, preventing damage to equipment connected to the line.diode