The B43726B9228M658 from TDK Corporation is a Supercapacitor with Capacitance 2200 µF, Voltage Rating 400 V, Equivalent Series Resistance 10 to 34 milli-ohm, Temperature Operating Range -40 to 85 Degree C. Tags: Screw Mount. More details for B43726B9228M658 can be seen below.