The CAP ALUM POLY 47UF 20 6.3V SMD capacitor is a type of aluminum-polymer radial capacitor with a high capacitance value of 47 microfarads (µF) and a voltage rating of 6.3 volts. It has a small footprint, making it suitable for surface mount design (SMD), and features a low resistance of 35 milliohms. This capacitor is designed to withstand high temperatures up to 105 degrees Celsius for an extended period of 5000 hours.