The BCAP0003 P300 X11/X12 from Maxwell Technologies is a Supercapacitor with Capacitance 3000 mF, Voltage Rating 3.0 V, Equivalent Series Resistance 62 mOhms, Temperature Operating Range -40 to 65 Degree C. Tags: Through Hole. More details for BCAP0003 P300 X11/X12 can be seen below.