The CAP ALUM POLY 820UF 20 2.5V T/H capacitor is a type of aluminum-polymer capacitor with the following specifications: it has an 820 microfarad capacitance, a 2.5-volt voltage rating, and is radial in design with a can structure. It features low resistance at 5 milliohms and can withstand temperatures up to 105°C for 2000 hours.