The most common type of varistor is the Metal Oxide Varistor

varistor is an electronic component with a "diode-like" nonlinear CXA1545 current voltage characteristic. The name is a portmanteau of variable resistor. Varistors are often used to protect circuits against excessive transient voltages by incorporating them into the MP1010BEF circuit in such a way that, when triggered, they will shunt the current created by the high voltage away from the sensitive components. A varistor is also known as Voltage Dependent Resistor or VDR. A varistor? is function is to conduct significantly increased current when HA13483 voltage is excessive.A varistor remains non-conductive as a shunt-mode device during normal operation when the voltage across it remains well below its "clamping voltage", so varistors are STRW5667 typically used to suppress line voltage surges. However, a varistor may not be able to successfully limit a very large surge from an event such as a lightning strike where the energy involved AD9951YSV is many orders of magnitude greater than it can handle. Follow-through current as a result of a strike may generate excessive current that completely destroys the varistor. Lesser surges still degrade it, however.