The B43733E2129M658 from TDK Corporation is a Supercapacitor with Capacitance 12000 µF, Voltage Rating 250 V, Equivalent Series Resistance 3.5 to 11 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43733E2129M658 can be seen below.