The SLA3R8L3071340 from Shanghai Yongming Electronic is a Supercapacitor with Capacitance 300000 mF, Voltage Rating 3.8 V, Equivalent Series Resistance 50 mOhms, Temperature Operating Range -40 to 85 Degree C. Tags: Through Hole. More details for SLA3R8L3071340 can be seen below.