The B43733B5338M658 from TDK Corporation is a Supercapacitor with Capacitance 3300 µF, Voltage Rating 450 V, Equivalent Series Resistance 9 to 36 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43733B5338M658 can be seen below.