250°C operating temperature dielectric film capacitors

Abstract

High operating temperature electronic components are needed for a variety of military, aerospace, downhole, and electric vehicle applications. One of the limiting technologies is the availability of highly reliable capacitors that operate at temperatures greater than 150°C and up through 250°C. This paper introduces a high breakdown strength dielectric film Gore has developed for metallized film capacitors. In addition to exceptionally high breakdown voltages, the 6 μm PTFE film exhibits low dissipation factor and stable capacitance over a wide temperature range. Film properties were tested from -50°C to 250°C and both wound film/foil and metallized film capacitors were fabricated and tested from RT to 300°C.