Aluminum - Polymer Capacitors Polymer Capacitors are available at Tenco Electronics. A polymer capacitor, or more accurately a polymer electrolytic capacitor, is an electrolytic capacitor (e-cap) with a solid electrolyte of a conductive polymer.Polymer electrolytic capacitors are characterized by particularly low internal equivalent series resistances (ESR) and high ripple current ratings. Their electrical parameters have similar temperature dependence, reliability and service life compared to solid tantalum capacitors, but have a much better temperature dependence and a considerably longer service life than aluminum electrolytic capacitors with non-solid electrolytes. Tenco offers inventory, pricing, & datasheets for Polymer Capacitors. To know more, please view our large section of Polymer Capacitorss below.