The ECAS series utilizes a multilayer anodized aluminum foil and a solid conductive polymer for the negative cathode. In the case leakage current is concentrated on the weak point of dielectric body, joule heat can be produced. When joule heat occurs, the anodized film is repaired, then the resistance of polymer rapidly rises and is locally insulated. This local insulation can block the leakage current. That said, the ECAS series has a built in safety feature that aids in limiting the combustion of the capacitor in case of a short circuit failure. Similarly, the ECAS series will not burn because the polymer becomes insulated before the aluminum temperature rises to its ignition point (polymer becomes more resistive as temperature increases above approximately 280ºC). In this way, unlike other types of capacitors, the ECAS Series ensures good safety with an electrochemical self-repairing system on the anodized film and polymer layer, and no danger of burning.