ITW Paktron has been manufacturing film capacitors since the late 1950s. A design innovator, Paktron and its parent, Illinois Tool Works Inc., hold in excess of seventy-five patents for film capacitor and machine design. Paktron makes Ultra-Low ESR capacitors.

Paktron specializes in multilayer, polymer film electronic capacitors. Products featured are the Surfilm® Surface Mount Chip Capacitor, Angstor® Miniature Radial Capacitor, Capstick® Lead-Framed MLP Capacitor, and the famous Quencharc® R-C Network and Snubber Capacitor.