The STN254050UL50AH from Eaton is a Power Diode with Reverse Current 0.1 to 1.0 µA, Reverse Voltage 5 V, Temperature operating range -55 to 150 Degree C, Reverse Breakdown Voltage 6.0 to 9.0 V, Total Capacitance 0.65 to 0.25 pF. Tags: Surface Mount. More details for STN254050UL50AH can be seen below.