Patent ID: 9184609
Filing Date: 2015-11-10
Classification: H01H,H01M,H02J,Y02E

Abstract:
1. A protection element connected onto an electric current path of an electric circuit comprising: an electrically insulating substrate; a heating resistor formed on one surface of the electrically insulating substrate with a first electrically insulating layer interposed therebetween; a low-melting-point body disposed above the heating resistor with a second electrically insulating layer interposed therebetween and that constitutes part of the electric current path; connection portions connected to both ends of the low-melting-point and that electrically connect the electric current path and the low-melting-point metal body; and a through hole that penetrates the inside of the electrically insulating substrate, wherein the connection portions are formed on both the one surface of the electrically insulating substrate with the third electrically insulating layer interposed therebetween and the other surface opposing the one surface of the electrically insulating substrate with a fourth electrically insulating layer interposed therebetween, and the through hole is formed in a position where the third electrically insulating layer is overlapped with the electrically insulating layer.