I believe the point that jpanhalt is trying to make is that a variator is chosen for a given application based on the manufacturer's voltage rating rather than its diameter. While the diameter of a varistor is directly related to the voltage rating of the particular device, diameter is not the parameter used in selecting a particular varistor for a specific application.my intention is not to know about the part number of varistor. i need to know how to choose varistor diameter for particular power supply. for example for 320V varistor 10mm, 15mm are available. i need to know exactly what diameter varistor is to be used?
by Jake Hertz
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