The 251M6301227MR12A from Matsuo Electric is a Power Capacitor with Capacitance 220 µF, Voltage Rating 6.3 V, Equivalent Series Resistance (ESR) 1000 mOhm, Operating Temperature -55 to 125 Degree C. Tags: Surface Mount, Film Capacitor. More details for 251M6301227MR12A can be seen below.