The B43733B9398M608 from TDK Corporation is a Supercapacitor with Capacitance 3900 µF, Voltage Rating 400 V, Equivalent Series Resistance 8.3 to 32 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43733B9398M608 can be seen below.