How to make a surge protector
The heart of many surge protectors available today is a small electronic component called a metal oxide varistor (MOV). It is also called TVS ( Transient voltage suppressor ) or surge arrester
An MOV ( Metal oxide varistor )is a cost effective technique to protect your electrical components or home appliances from potentially dangerous & damaging transient voltages. It arreste high voltage spikes.
Being a voltage dependent resistor, an varistor does not conduct when the voltage across it is less that what is called the threshold voltage. It essentially has infinite resistance.
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