The JJD-Series from Nichicon is a Supercapacitor with Capacitance 1000000 to 2500000 mF, Voltage Rating 2.5 V, Equivalent Series Resistance 3500 to 8000 mOhms, Temperature Operating Range -25 to 60 Degree C. Tags: Through Hole. More details for JJD-Series can be seen below.