Thermally protected metal oxide varistor
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United States of America Patent
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-
Oct 21, 2003
Grant Date -
Dec 27, 2001
app pub date -
Apr 26, 2001
filing date -
Apr 26, 2000
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A varistor has a thermal fuse between a lead and an electrode. The fuse includes a link extending between the surface of an insulator and the fused electrode. The electrical connection of the link and the electrode is maintained by a low temperature solder fillet. That part of the link between the electrode and the insulator is surrounded by hot melt electrically insulating material. Upon sustained over-voltage conditions, the link and the solder fillet melt, and an insulating gap is rapidly created by molten hot melt material.
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