The B43707A9478M657 from TDK Corporation is a Supercapacitor with Capacitance 4700 µF, Voltage Rating 400 V, Equivalent Series Resistance 10 to 26 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43707A9478M657 can be seen below.