The T520X687M004ATE015 from KEMET Corporation is a Power Capacitor with Capacitance 680 uF, Voltage Rating 4 V, Equivalent Series Resistance (ESR) 15 mOhm, Mass 553.96 milligram, Operating Temperature -55 to 105 Degree C. Tags: Surface Mount, Polymer Capacitor. More details for T520X687M004ATE015 can be seen below.