The CAP ALUM POLY 390UF 20 2V SMD is a type of capacitor. It has a capacitance value of 390 microfarads and operates at a voltage of two volts. The component utilizes an aluminum-polymer material composition and comes in a surface-mount device (SMD) package with a metric size designation of 2917, equivalent to the 7343 in imperial measurements. This capacitor boasts a low internal resistance of ten milliohms and features a reliable lifespan of one thousand hours at an elevated temperature of 105 degrees Celsius.