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Zinc oxide varistor
 
1.Uses
Zinc oxide varistor is a sort of sensitive component which resistance value can vary with the applied voltage , it is widely used in electrical and electronic equipments to protect them from damage of transient overvoltage and for surge absorption .
 
 
2.Features
Broad varistor voltage range :*8V to 1.8KV
Fast response to transient voltage (ns)
High great withstanding surge current
Excellent non-linearity voltage
Symmetric V-I characteristic
No following-on current
Long life
 
 
3.Range of application
Used in surge protection for IC , transistor , diode semiconductor switch circuits .
Used in communication ,telemetering,electrical control and various electronic equioments.
Suppress the instantaneous overvoltage caused by electromagnetic valve and relay .
Suppress the instantaneous overvoltage caused by power supply.
Suppress the instantaneous overvoltage caused by electronic circuits.
Lighting protection for various kingd of electronic appliances .
 
 
4.Technical conditions
The zinc oxide varistor carry out standards of GB/T****3 , GB/T****4, GB/T*********7 and SJ/T**********9 .
Measurement conditions : for varistor of *5D,*7D,*0D,*4D,*0D series , voltage across the varistor measured under 1mADC .
Varisor voltage : the voltage between two terminals with the specified measureing current applied is expressed by letter V .
Maximum continuous operating voltage :the maximum sinusoidal RMS voltage or maximum DC voltage that can be applied continuously in the specified environmental temperature range .
Working ambient temperature : **0℃ ~ **5℃
Storage temperature range : **0℃ ~ ***5℃
 
5.Recognized standards and certificates