The RSHT1391M1GFK5002X from Taiyo Yuden is a Supercapacitor with Capacitance 390 µF, Voltage Rating 35 V, Equivalent Series Resistance 18 milli-ohm, Temperature Operating Range -55 to 105 Degree C. Tags: Surface Mount. More details for RSHT1391M1GFK5002X can be seen below.