The C503B-GCS/GCN from Cree LED is a LED with Forward Voltage 3.2 to 4 V, Forward Current 30 mA, Luminous Intensity cd 5860 to 20000 mcd, Luminous Intensity mcd 5860 to 20000 mcd, Reverse Current 100 µA. More details for C503B-GCS/GCN can be seen below.