This　article　presents　a　thermal　modeling　and　simulation　of　fast　electric　fuses　used　for　power　electronic　protection　equipment.　These　devices　still　have　low　overload　abilities　and　need　fast　protection,　justifying　the　researches　in　this　domain　area.　For　a　fast　fuse　it　was　realized　a　3D　model　with　the　Pro-Engineer　software.　Temperature　distribution　through　the　fuse　and　through　all　fuselink　elements　simulated　and　analyzed.　Thus,　with　the　3D　simulation,　the　design　of　the　fuse　can　be　improved　and　can　be　estimated　better　solutions　to　protect　the　power　semiconductor　equipment.　©　2018　IEEE.