Protective element
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United States of America Patent
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May 20, 2003
Grant Date -
Feb 7, 2002
app pub date -
May 1, 2001
filing date -
May 17, 2000
priority date (Note) -
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Abstract
A protective element contains a heat-generating member and a low melting metal member on a substrate, in which the low melting metal member is molten by the heat generated by the heat-generating member and flows onto electrodes, which causes the low melting metal member to blow out, Formula (1) below is satisfied: (cross-sectional area of the low melting metal member)/(surface area of the blowout-effective electrode).ltoreq.0.15 (1) Alternatively, Formula (2) below is satisfied: 2.5.ltoreq.(inter-electrode distance)/(cross-sectional area of the low melting metal member).ltoreq.30 (2) wheren the inter-electrode distance is defined as the distance between two electrodes, among the low melting metal member electrodes onto which the molten low melting metal member flows, which are adjacent to each other with the low melting metal member interposed therebetween.
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