Protection Element

摘要

The present invention provides a protection device which comprises: a laminar element 16 which is formed of an insulation resin and has at least one throughhole; electrically conductive metal thin layers 22 and 28 which are positioned on each of main surfaces of the laminar element, and a fuse layer 40 which is positioned on a side surface defining said at least one throughhole and electrically connects the electrically conductive metal thin layers wherein the fuse layer comprises a first metal layer 41 consisting of a metal having a higher melting point and a second metal layer 42 consisting of a metal having a lower melting point. The protection device of the present invention allows a larger amount of a current to flow therethrough and can provide a protection from an excessive current.

主权项

1. A protection device which comprises
a laminar element which is formed of an insulation resin and has at least one throughhole, an electrically conductive metal thin layer which is positioned on each of main surfaces of the laminar element, and a fuse layer which is positioned on a side surface defining at least one of said at least one throughhole and electrically connects the electrically conductive metal thin layers wherein the fuse layer at least comprises a first metal layer consisting of a metal having a higher melting point and a second metal layer consisting of a metal having a lower melting point.