Over-current protection device and protective circuit module containing the same
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United States of America Patent
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Jun 13, 2017
Grant Date -
Jun 9, 2016
app pub date -
Nov 24, 2015
filing date -
Dec 5, 2014
priority date (Note) -
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Abstract
An over-current protection device comprises a PTC device and a first external lead. The PTC device comprises first and second conductive layers and a PTC material layer laminated therebetween. The first conductive layer forms an upper surface of the PTC device. The first external lead has a lower surface soldered to the first conductive layer. The lower surface is provided with a plurality of protrusions of which tops are in direct contact with the first conductive layer to form a gap between the first external lead and the first conductive layer. Solder paste fills the gap to form an electrically conductive connecting layer. The over-current protection device may further comprise a second external lead with protrusions soldered to the second conductive layer to form an axial-lead or a radial-lead type device.
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