The DDKA2R5ELL210MM26S from Nippon Chemi Con is a Supercapacitor with Capacitance 21 F, Voltage Rating 2.5 V, Equivalent Series Resistance 30 milli-ohm, Temperature Operating Range -40 to 70 Degree C. Tags: Through Hole. More details for DDKA2R5ELL210MM26S can be seen below.