The DF2S5M4SL from Toshiba is a Power Diode with Dynamic Resistance 0.3 ohm, Reverse Current 0.1 uA, Reverse Voltage 3.7 to 5.5 V, Repetitive Peak Reverse Voltage 3.6 V, Non-Repetitive Peak Forward Current 2 A. Tags: Surface Mount. More details for DF2S5M4SL can be seen below.