This is a 20 volt, 4700 uF Supercapacitor manufactured by the Samxon Corporation. It has a maximum operating temperature of 85°C and features a radial lead mounting. The supercapacitor is designed for use in high frequency switching DC/DC converters, such as power supplies, in automotive, communications and industrial control applications. The EGT477M1JI20RRSHP is RoHS compliant and has an ESR (Equivalent Series Resistance) of 2 mO.