The B43726C5398M650 from TDK Corporation is a Supercapacitor with Capacitance 3900 µF, Voltage Rating 450 V, Equivalent Series Resistance 6.6 to 24 milli-ohm, Temperature Operating Range -40 to 85 Degree C. Tags: Screw Mount. More details for B43726C5398M650 can be seen below.