Optocouplers / Photocouplers

Optocouplers are in stock with same-day shipping at Mouser from industry leading manufacturers. Mouser is an authorized distributor for many optocoupler manufacturers including Broadcom, LITEON, onsemi, Renesas, Toshiba, Vishay & more.

Optocouplers are semiconductor devices that transfer electrical signals between isolated circuits using light as the transmission medium. They typically contain an internal light emitter and a photodetector, allowing signal transmission while maintaining electrical isolation to protect sensitive components. This isolation helps prevent noise, voltage spikes, and ground loops from impacting system performance and reliability. They are also known as Photocouplers, Optoisolators, and Optical Isolators.

Types: Common optocoupler types include phototransistor, photodiode, phototriac, and logic gate optocouplers, as well as high-speed and high-voltage variants tailored for specific isolation and switching needs.

Applications: Optocouplers are widely used in power supplies, industrial control systems, motor drives, communication interfaces, and safety isolation circuits to protect and isolate low-voltage control electronics from high-voltage environments.

Selection requirements: To choose optocouplers, evaluate isolation voltage, current transfer ratio (CTR), switching speed, input/output characteristics, package type, and reliability within the intended electrical and environmental conditions.

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Please view our large selection of optocouplers below.