The 304DCN2R7SCBB from Cornell Dubilier is a Supercapacitor with Capacitance 300 mF, Voltage Rating 2.7 V, Equivalent Series Resistance 1000 to 1500 mOhms, Temperature Operating Range -40 to 60 Degree C. Tags: Through Hole. More details for 304DCN2R7SCBB can be seen below.