The B43707B9398M607 from TDK Corporation is a Supercapacitor with Capacitance 3900 µF, Voltage Rating 400 V, Equivalent Series Resistance 10 to 30 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43707B9398M607 can be seen below.