The RAHV1221M1LDE7002 from Taiyo Yuden is a Supercapacitor with Capacitance 220 µF, Voltage Rating 10 V, Equivalent Series Resistance 24 milli-ohm, Temperature Operating Range -55 to 105 Degree C. Tags: Surface Mount. More details for RAHV1221M1LDE7002 can be seen below.