The VS28VUA1LBTBR1 from ROHM Semiconductor is a Power Diode with Reverse Current 2.5 µA, Reverse Voltage 28 V, Temperature operating range -55 to 150 Degree C, Reverse Breakdown Voltage 31.1 to 34.4 V. Tags: Surface Mount. More details for VS28VUA1LBTBR1 can be seen below.