The RCHV1221M1JDC8002 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 RCHV1221M1JDC8002 can be seen below.