Varistor is a sort of sensitive component which resistance value can vary with the applied voltage, it is widely used in the instantaneous overvoltage protection and surge absorption of Electronic-electrical equipment.
Features:
Great range of varistor voltage: 18V to 1.8KV
Fast response to transient voltage (ns)
High great withstanding surge current
Excellent non-linearity voltage
Symmetric V-I characteristics
No following-on current
Long life
Range of application:
Used in surge protection for IC, transistor, diode semiconductor switch circuit.
Used in communication, telemetering, electrical control and various electronic equipment.
Suppress the instantaneous overvoltage caused by electromagnetic valve and relay.
Supprss the instantaneous overvoltage caused by power supply.
Suppress the instantaneous overvoltage caused by electronic circuits
Lightning protection for various kind of electronic appliances.
Technical conditions:
Carry our standard of GB/T10193, GB/T10194, GB/T10195-1997 and SJ/T10348-10349.
Measurement conditions For varistors of 05D, 07D, 10D, 14D, 20D Series, voltage across the varistor measured under 1mA DC.
Varistor voltage: The voltage between two terminals with the specified measuring 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.