The CAP ALUM POLY 680UF 20 16V T/H is a type of capacitor that features an aluminum-polymer design. It has a capacitance rating of 680 microfarads at 16 volts and a radial, can-style construction with a resistance of 8 milliohms. Additionally, it boasts a long lifespan of up to 2000 hours when operating at temperatures as high as 105 degrees Celsius.