Emi feedthrough filter terminal assembly having surface mounted, internally grounded hybrid capacitor

Abstract

An EMI feedthrough filter terminal assembly includes a capacitor having first and second sets of electrode plates, a first passageway having a first termination surface coupling the first set of electrode plates, a second passageway having a second termination surface coupling the second set of electrode plates, and a third termination surface exteriorly coupling the second set of electrode plates. A ferrule is adjacent to the capacitor and includes an oxide resistant biostable conductive pad, i.e., a noble metal pad, on a surface thereof coupled to the third termination surface. A conductive terminal pin extends through the first passageway in conductive relation with the first set of electrode plates. A conductive ground lead extends through the second passageway in conductive relation with the second set of electrode plates. An insulator is fixed to the ferrule for supporting the terminal pin in conductive isolation from the ferrule.