The 30HC129M6R3GK2A from Barker Microfarads is a Power Capacitor with Capacitance 12000 µF, Voltage Rating 6.3 V, Equivalent Series Resistance (ESR) 0.08 Ohm, Operating Temperature -40 to 105 Degree C. Tags: Through Hole, Polymer Capacitor. More details for 30HC129M6R3GK2A can be seen below.