Aluminum Capacitors Aluminum Capacitors are available at Kynix Electronics. Aluminum capacitors are polarized electrolytic capacitors whose anode electrode (+) is made of a pure aluminum foil with an etched surface. The aluminum forms a very thin insulating layer of aluminium oxide by anodization that acts as the dielectric of the capacitor. Kynix is an authorized distributor for many aluminum electrolytic capacitor manufacturers including Cornell Dubilier, EPCOS, Kemet, Lelon, Nichicon, Panasonic, United Chemi-Con, Vishay & more. To know more, please view our large selection of aluminum capacitors below.