The C503B-GAS/GAN from Cree LED is a LED with Forward Voltage 3 to 3.8 V, Forward Current 30 mA, Luminous Intensity cd 16800 to 50000 mcd, Luminous Intensity mcd 16800 to 50000 mcd, Reverse Current 100 µA. More details for C503B-GAS/GAN can be seen below.