The HBM-2R3-J257FRYJ1860 from Jinzhou Kaimei Power is a Supercapacitor with Capacitance 250000 mF, Voltage Rating 2.3 V, Equivalent Series Resistance 40 mOhms, Temperature Operating Range -25 to 60 Degree C. Tags: Surface Mount. More details for HBM-2R3-J257FRYJ1860 can be seen below.