(1) distinguish between power supply protection, or signal lines, data lines with TGE Varistor for counter protection, they are to meet different technical standards.
(2) Depending on the varistor applied continuous operating voltage can be across the line with a varistor can be divided into AC or DC with the use of two types, varistors in both voltage stress different aging characteristics performance.
(3) According to the varistor withstand abnormal over-voltage characteristics of different, can be divided into varistor for surge suppression, high-power and high-energy type of these three types.
Surge suppression: is used to suppress lightning over-voltage and over-voltage and other transient over-voltage varistor, this transient overvoltage occurs it is random, and current-voltage non-peak periods may be Big. The vast majority mov metal oxide varistor fall into this category.
High power type: refers to the absorption cycle for continuous bursts appear varistor, for example, and connected to the switching power converter varistor voltage cycle where impact occurs, and the cycle shows that the energy value may be calculated in general out, the peak voltage is not large, but the high frequency of occurrence, the average power is considerably large.
Energy Type: generator means for absorbing the excitation coil, and other large lifting electromagnet coil inductance coil magnetic energy varistor voltage is, for such applications, the main technical indicators are energy absorption capability.
Varistor protection, the vast majority of applications, it can repeatedly effect, but sometimes also to make it into the current fuse as a "one-off" protection device. For example, and then on some of the short-circuit current transformer load contacts TGE metal oxide varistor identification.
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