Definition of Metal oxide varistors

Metal oxide varistors is a voltage limiting protection devices. Utilizing nonlinear characteristics Metal oxide varistors, when an overvoltage occurs between the two poles of the metal oxide varistors application, the metal oxide varistors application voltage can be clamped to a relatively fixed voltage value, in order to achieve protection of the post-stage circuit. The main parameters of Metal Oxide Varistors (MOV)s are: Metal Oxide Varistors (MOV) voltage, flow capacity, junction capacitance and response time.Metal Oxide Varistors (MOV) response time is ns level, faster than the air discharge, slightly slower than the TVS tube, generally used in electronic circuit overvoltage protection response speed to meet the requirements. When the junction capacitance Metal Oxide Varistors (MOV) is generally on the order of hundreds to thousands of Pf range, and in many cases should not be applied directly to the protection of high-frequency signal lines, the application of the AC circuit protection, as it will greatly increase the drain junction capacitance current protection circuit is designed to take full account. Metal Oxide Varistors (MOV) flow capacity is large, but smaller than the gas discharge tube.
mov metal oxide varistor referred VSR, it is a kind of non-linear voltage-sensitive semiconductor overvoltage protection device. It is used in the circuit text symbol "RV" or "R" represents, the picture is the circuit graphic symbols.
"mov metal oxide varistor" is a noun in mainland China, meaning "within a certain range of the resistance value of the current and voltage with the voltage change," or that "the resistance value of the voltage-sensitive" resistor. mov metal oxide varistor resistive material is a semiconductor, so it is a variety of semiconductor resistor. Now extensive use of "zinc oxide" varistor, its main material of divalent element and hexavalent elemental oxygen posed. So from a material point of view, the zinc oxide varistor is a kind of "Ⅱ-Ⅵ family-oxide semiconductor."
In China Taiwan, varistors are named according to their use, known as the "surge absorber." Varistor according to their use is sometimes also referred to as "electric shocks (surge) suppressor (absorber)."