The B43726B9129M600 from TDK Corporation is a Supercapacitor with Capacitance 12000 µF, Voltage Rating 400 V, Equivalent Series Resistance 2.2 to 6.3 milli-ohm, Temperature Operating Range -40 to 85 Degree C. Tags: Screw Mount. More details for B43726B9129M600 can be seen below.