MOV Working principle of varistor

MOVVaristorAs a nonlinear resistance element, it will have different working modes under different voltages. The following is a brief introduction of the varistor manufacturerto share with friends the working principle of theMOVvaristor

MOVVaristorPrinciple: When applied toMOVVaristoris lower than its threshold value, the current flowing through it is very small, which is equivalent to a resistance with infinite resistance. That is, when the voltage applied to it is lower than its threshold value, it is equivalent to a switch in the off state. When the voltage applied to the rheostat exceeds its threshold value, the current flowing through it increases sharply, which is equivalent to a resistance that is verySmall resistance. That is, when the voltage applied to it is higher than its threshold value, it is equivalent to a switch in the closed state."Rheostat"is a resistance device with nonlinear volt-ampere characteristics, mainly used for voltage clamping and absorbing excessive current to protect sensitive devices when the circuit is subject to overvoltage. The resistance material of the varistor is semiconductor, so it is a variety of semiconductor resistors.MOVVaristor is a voltage limiting protection device. With the nonlinear characteristics of varistor, when overvoltage occurs between the two poles of varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thus realizing the protection of subsequent circuits. Varistor is one of the voltage limiting devices widely used. Varistor includes silicon carbide varistor and zinc oxide varistor. Zinc oxide(ZnO)Varistors are commonly used as overvoltage protection devices, which are made of zinc oxide as raw material, adding a variety of trace metal oxides, and then mixed, molded and sintered. Their outer surface is sealed with epoxy resin(Pigment can be added)。

Huizhou Chuangde Lightning Protection Electronics Co., Ltd. is specialized in the production of varistor andOEMGenerationIndustrial enterprises, main products includeMOVVaristors, surge absorbers, varistors, lightning protection varistors, etc. are manufactured using advanced varistor manufacturing technology and process/The testing equipment is complete, and the products are recognized by the majority of customers with high-quality and stable product quality and good after-sales service. The products are sold at home and abroad. Welcome to negotiate cooperation.