The B43727A9189M608 from TDK Corporation is a Supercapacitor with Capacitance 18000 µF, Voltage Rating 400 V, Equivalent Series Resistance 2.6 to 6.7 milli-ohm, Temperature Operating Range -25 to 85 Degree C. Tags: Screw Mount. More details for B43727A9189M608 can be seen below.