{HEAD ~ The breakdown voltage} of a varistor or rectifier is lowered by decreasing the number of interfaces presenting conduction barriers between the two terminals, while the power capability of {TAIL ~ the device} is improved by increasing the net interfacial area 
{ HEAD ~ The breakdown voltage } of a varistor or rectifier is lowered by decreasing the number of interfaces presenting conduction barriers between the two terminals , while the power capability of { TAIL ~ the device } is improved by increasing the net interfacial area
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