The 6N138S-TA1-L Optocoupler with 1 Channel, featuring a Darlington output, is manufactured by Lite-On. It is an SMD (surface-mount device) with a high-voltage rating of 2.5kV, and has gull-wing 8-pin legs. It offers safety and efficient electrical isolation between two circuits, and can be used to interface low power electronics with high power circuits in a variety of control systems.