A varistor is an electronic component with a "diode-like" nonlinear 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 circuit in such a way that, when triggered, they will shunt the current created by the high voltage away from sensitive components. A varistor is also known as voltage-dependent resistor (VDR). A varistor’s function is to conduct significantly increased current when voltage is excessive.

Device Ratings and Characteristics

SeriesMaximun Allowable VoltageVaristor VoltageMaximun Clamping VoltageDownload
Automotive C Series--14~5614.4~54.418~6821.6~81.636~1352.5~20
High temperature N Series11~46014~61514.4~60018~75021.6~90036~12351~200
Extra High Energy H Series130~680170~895160~880200~1100240~1320340~181510~200
Thermally Cut-Off MOV F Series130~680--185~990--225~1210340~181550~100
Thermally Cut-Off MOV With Indicator T series130~680--185~990--225~1210340~181550~100
High Surge S Series130~680170~859185~990200~1100225~1210340~181575~125
High Energy P Series130~680175~859185~990200~1100225~1210340~181550~100
Medium Surge V Series130~680175~895185~990200~1100225~1210340~181510~100
Standard D Series11~100014~146514.4~162018~180021.6~198044~29701~100