The DF2S12FS from Toshiba is a Power Diode with Reverse Current 0.5 uA, Reverse Voltage 11.4 to 12.6 V, Repetitive Peak Reverse Voltage 9 V, Peak Reverse Voltage 9 V, Temperature operating range -55 to 150 Degree C. Tags: Surface Mount. More details for DF2S12FS can be seen below.