This is a capacitor with the following specifications: CAP ALUM POLY 100UF 20 35V SMD, which has a capacitance of 100 microfarads at a voltage rating of 35 volts. It is an aluminum-polymer type, packaged in a radial can design for surface-mount device (SMD) applications with a resistance of 35 milliohms and a lifespan of up to 4000 hours at a temperature of 125 degrees Celsius.