Current fuse and method of making the current fuse

Abstract

In order to provide a current fuse with high solderability without containing harmful materials, solder chips containing 30 to 60 percent by weight of zinc, 0.1 to 2 percent by weight of copper, 0.1 to 1 percent by weight of nickel, and the remainder percent by weight being tin, or further containing 0.01 to 0.5 percent by weight of aluminum are inserted into the interior of the electrodes before pressing the electrodes into the ends of the substrate of the fuse, the exterior of the electrodes is heated to melt the solder chips, thereby connecting between the electrodes and the fuse wire.

1 . A method of making a current fuse by soldering a fuse wire and electrodes using lead-free solder at a temperature between a solid phase temperature and a liquid phase temperature of said lead-free solder.  
   
   
       2 . The method of making a current fuse according to  claim 1 , wherein said lead-free solder contains at least 30 to 60 percent by weight of zinc, 0.1 to 2 percent by weight of copper, 0.1 to 1 percent by weight of nickel, with the remainder percent by weight being tin.  
   
   
       3 . The method of making a current fuse according to  claim 2 , wherein said lead-free solder further contains 0.01 to 0.5 percent by weight of aluminum.