The BCAP0450 P270 S18 from Maxwell Technologies is a Supercapacitor with Capacitance 450000 mF, Voltage Rating 2.7 V, Equivalent Series Resistance 2.9 mOhms, Temperature Operating Range -40 to 65 Degree C. Tags: Through Hole. More details for BCAP0450 P270 S18 can be seen below.