The CAP ALUM POLY 560UF 20 4V SMD is a type of capacitor that features a radial design with an aluminum-polymer construction. It has a capacitance value of 560 microfarads and operates at a voltage of 4 volts. This component is suitable for Surface Mount Device (SMD) applications and has a resistance rating of 9 milliohms. The capacitor is designed to maintain its performance for up to 2000 hours at an operating temperature of 105 degrees Celsius.