The 6N138 Optocoupler is a high-speed logic-output darlington opto-isolator designed to provide reliable electrical isolation between low-voltage control circuits and higher-voltage or noisy environments. Supplied in a standard 8-pin DIP through-hole package, it is ideal for breadboarding, prototyping, repairs, and production designs.

Featuring a high-gain photodetector and TTL-compatible output, the 6N138 is widely used in MIDI interfaces, microcontroller inputs, industrial control systems, and data communication circuits. It provides excellent noise immunity and protects sensitive electronics from voltage spikes and ground loops. Fully stocked in the UK for fast and dependable dispatch.