The RCHVK221M1TEH0002E from Taiyo Yuden is a Supercapacitor with Capacitance 220 µF, Voltage Rating 25 V, Equivalent Series Resistance 27 milli-ohm, Temperature Operating Range -55 to 125 Degree C. Tags: Surface Mount. More details for RCHVK221M1TEH0002E can be seen below.