The DMT3N4R2U224M3DTA0 from CAP-XX is a Supercapacitor with Capacitance 176 to 264 mF, Voltage Rating 4.2 V, Equivalent Series Resistance 300 to 360 mOhm, Temperature Operating Range -40 to 85 Degree C. Tags: Surface Mount. More details for DMT3N4R2U224M3DTA0 can be seen below.