The DF3A5.6F from Toshiba is a Power Diode with Dynamic Resistance 40 ohm, Reverse Current 1.0 uA, Reverse Voltage 5.3 to 6.0 V, Peak Reverse Voltage 6.5 V, Temperature operating range -55 to 150 Degree C. Tags: Surface Mount. More details for DF3A5.6F can be seen below.