Coated varistor
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United States of America Patent
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Sep 13, 2005
Grant Date -
Apr 28, 2005
app pub date -
Jun 24, 2003
filing date -
Aug 29, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A varistor includes a varistor element, a first layer which is porous on the varistor element, and a second layer on th first coating. The thickness t (mm) of the second layer is not smaller than 1.3/V. where V(ml/g) is the volume of pores of the first layer exposed to an outside of the first layer. This varistor includes the outer layers protected from being broken even when a non-ohmic interface in a voltage non-linear resistor is broken down with a voltage exceeding a rated level.
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