The HR1N5811US from Micross is a Space Qualified Diode with Dynamic Resistance 6.5 Degree C/W (Thermal), Forward Current 1.7 to 6 A, Forward Voltage 0.875 V, Reverse Current 5 to 150 uA, Reverse Voltage 150 V. Tags: Surface Mount. More details for HR1N5811US can be seen below.