The CAP ALUM POLY 1200UF 20 4V SMD capacitor features a high capacitance value of 1200 microfarads and operates at a voltage rating of 4 volts. It is designed with an aluminum-polymer construction, offering a radial, can-shaped design suitable for surface-mount device (SMD) applications. This component boasts a low ESR (electrical resistance) of approximately 9 milliohms and has been tested to withstand temperatures up to 105°C for a duration of 2000 hours.