The PHV-5R4V305-R from Eaton is a Supercapacitor with Capacitance 3000 mF, Voltage Rating 5.4 V, Equivalent Series Resistance 75 to 80 mOhms, Temperature Operating Range -40 to 65 Degree C. Tags: Through Hole. More details for PHV-5R4V305-R can be seen below.