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PROTECTIVE DEVICE

  • US 20120001720A1
  • Filed: 01/14/2010
  • Published: 01/05/2012
  • Est. Priority Date: 01/21/2009
  • Status: Active Grant
First Claim
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1. A protective device for protecting equipment for protection in case an unusual power is applied to the equipment for protection, comprising:

  • a fusible conductor arranged on an insulation base substrate and connected to a power supply path for the equipment for protection so that the fusible conductor will be fused off by a preset unusual power;

    an insulation cover mounted on the base substrate to overlie the fusible conductor via a preset spacing; and

    a flux coated on the surface of the fusible conductor and disposed in the spacing;

    the fusible conductor being fused off to break a current path thereof in case the unusual power is applied to the equipment for protection;

    whereinthe fusible conductor is secured to a conductor layer and to pair electrodes provided on the base substrate via an electrically conductive paste containing a metal component exhibiting high wettability with respect to the fusible conductor in the fused state;

    the electrically conductive paste being spread more outwards on the conductor layer than the rim of the fusible conductor.

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