This is a 5 mm green Light Emitting Diode, or LED, manufactured by Optosupply and identified with the part number OSG5DA5TC5A. The LED features a luminous intensity of 750 to 1120 mcd, with a half-intensity angle of 120 degrees, and a flat front side with a 2.54 mm pitch. It is ideal for lighting, backlighting, indication, point sources, and signage applications.