The 566-3507F is a bi-color red/green 2mm x 5mm rectangular LED circuit board indicator (CBI) featuring a common cathode configuration with three leads. It delivers a peak wavelength of 635 nm for red and 565 nm for green, with typical luminous intensity of 3.5 mcd and 4 mcd respectively at 10 mA test current. The indicator features a 100° viewing angle, forward voltages of 1.9 V (red) and 2.1 V (green), and operates over a temperature range of -20°C to +85°C. The housing is constructed from UL 94 V-0 rated black PBT polymer with an oxygen index of 32%, and the device is safe for direct viewing per IEC 825-1 and EN-60825-1 standards. Multiple units can be arranged on 10.16 mm center-lines to form horizontal LED arrays, making it ideal for status indication, alarm displays, and circuit board monitoring applications.