The CAP ALUM POLY 18UF 20 50V SMD capacitor is a type of radial, can-style component featuring an aluminum-polymer design. Its specifications include an 18 microfarad capacitance and a maximum operating voltage of 50 volts. This surface-mount device (SMD) is designed for high reliability, with a specified lifetime of 5000 hours at an elevated temperature of 105 degrees Celsius, along with a relatively low resistance value of 35 milliohms.