The Capacitors with the Highest Available Power Density in Medium Voltage Range

Tantalum Hybrid capacitors take advantage of the best features of electrolytic and electrochemical capacitors. They combine an anode from an electrolytic capacitor, a cathode from an electrochemical capacitor and compatible electrolyte. The tantalum Hybrid capacitor is a series combination of an anodic dielectric oxide film capacitance, Ta2O5, and a high electrochemical capacitance, a film of the conductive metal oxide, RuO2. The ruthenium oxide creates the electrochemical cathode. High operating voltage is achieved by using a dielectric oxide layer on the anode without exceeding the breakdown potential of the aqueous electrolyte. This allows capacitors with high cell voltage to be produced.