The B43726B6338M658 from TDK Corporation is a Supercapacitor with Capacitance 3300 µF, Voltage Rating 500 V, Equivalent Series Resistance 6.1 to 20 milli-ohm, Temperature Operating Range -40 to 85 Degree C. Tags: Screw Mount. More details for B43726B6338M658 can be seen below.