The CAP ALUM POLY 330UF 20 4V SMD is a type of capacitor with the following specifications: 330 microfarads (µF) capacitance, 4 volts voltage rating, and an aluminum-polymer dielectric. It has a radial, can-style package and is designed for Surface Mount Device (SMD) applications. The device features a resistance of 30 milliohms (mOhm) and is tested to last 2000 hours at an operating temperature of 105 degrees Celsius (°C).