The part number CAP ALUM POLY 220UF 20 refers to a type of capacitor. This specific component is a radial, surface mount (SMD) aluminum-polymer capacitor with a capacitance value of 220 microfarads and a working voltage rating of 6.3 volts. Its body style is can-based and it has a resistance of 15 milliohms. The product's lifespan is guaranteed for up to 5000 hours when operated at an ambient temperature of 105 degrees Celsius.