The CAP ALUM POLY 390UF is a type of capacitor that features a radial design with an aluminum-polymer construction. It has a capacitance value of 390 microfarads and operates at a voltage rating of 6.3 volts. This component is suitable for surface-mount devices (SMD) and is characterized by low resistance, specifically 22 milliohms. Additionally, it boasts a high endurance life of 5000 hours at an operating temperature of 105 degrees Celsius.