Electric double-layer capacitor (EDLC) is an electrochemical capacitor that has an unusually high energy density when compared to common capacitors, typically on the order of thousands of times greater than a high capacity electrolytic capacitor. It is also known as ultracapacitor, supercapacitor, supercondenser, pseudocapacitor.

Here is the list of manufacturers of EDLC ultracapacitors. This list is based on linecards of electronics component manufacturers, and distributors, as of 2010.

  • AVX Corp. (http://www.avxcorp.com/)
  • Cooper Bussmann (http://www.cooperbussmann.com/)
  • Cornell Dubilier (http://www.cde.com/)
  • Elna America Inc. (http://www.elna-america.com/)
  • EPCOS (http://www.epcos.com/)
  • Maxwell Technologies, Inc. (http://www.maxwell.com/)
  • NEC (http://www.nec.com/)
  • NessCap Co Ltd. (http://www.nesscap.com/)
  • Nichicon (http://www.nichicon-us.com/)
  • Panasonic Industrial Components (http://www.industrial.panasonic.com/)
  • Seiko Instruments USA Inc. (http://www.seikoinstruments.com/)
  • Taiyo Yuden (http://www.t-yuden.com/)
  • Vishay (http://www.vishay.com/)
  • United Chemi-Con (http://www.chemi-con.com/)
  • Wima (http://www.wima.com/)