The specified capacitor is a CAP ALUM POLY 390UF 20 2.5V SMD type, characterized by its high capacitance of 390 microfarads and a working voltage of 2.5 volts. It features an aluminum-polymer dielectric material, which provides superior performance in radial and surface-mount designs (SMD). This capacitor is suitable for applications requiring long lifetimes of up to 2000 hours at elevated temperatures of 105 degrees Celsius, with an ESR of 20 milliohms.