The DF2B20M4SL from Toshiba is a Power Diode with Dynamic Resistance 0.2 ohm, Reverse Current 0.1 uA, Reverse Voltage 19.5 to 26 V, Repetitive Peak Reverse Voltage 18.5 V, Non-Repetitive Peak Forward Current 0.5 A. Tags: Surface Mount. More details for DF2B20M4SL can be seen below.