The RCHT1221M1TEH0002 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 105 Degree C. Tags: Surface Mount. More details for RCHT1221M1TEH0002 can be seen below.