The RAHT1221M1JDC8002E from Taiyo Yuden is a Supercapacitor with Capacitance 220 µF, Voltage Rating 6.3 V, Equivalent Series Resistance 45 milli-ohm, Temperature Operating Range -55 to 105 Degree C. Tags: Surface Mount. More details for RAHT1221M1JDC8002E can be seen below.