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Question

Solid state power supplies are protected from medium surge voltage using : 

A.

Zinc-oxide-based varistors 

B.

Cermet resistors 

C.

Metal glaze resistors 

D.

Silicon-carbide varistors

Answer ( Option A)

Zinc-oxide-based varistors 

Solution

Zinc- Oxide based varistors (ZnO)- The surge arrestor which uses Zinc-oxides semiconductor as a resistor material known as a metal oxide surge arrestor or ZnO varistor. The diverter provides protection against all type of AC and DC fault.

Solid state power supplies are protected from medium surge voltage using Zinc oxide based varistor.

Hence, the correct option is (A).

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