The DGH306Q2R7 from Cornell Dubilier is a Supercapacitor with Capacitance 30000 mF, Voltage Rating 2.7 V, Equivalent Series Resistance 22 to 30 mOhms, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for DGH306Q2R7 can be seen below.