The ECAS series utilizes multilayer anodized aluminum foil and solid conductive polymer for negative cathode. In the case leak current is concentrated on the weak point of dielectric body, joule heat can be produced. When joule heat occurs, anodized film is repaired, then the resistance of polymer rapidly rises and is locally insulated. This local insulation can block the leak 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 never burn because polymer becomes insulated before the aluminum temperature rises to its ignition point - polymer becomes more resistive as temperature increases above 280°C. In this way, the ECAS series ensures good safety compared to other electrolytic types of capacitors, with electrochemical self-repairing system on anodized film and polymer layer, and no danger of burning.