Optoisolators Provides galvanic isolation between input and output to protect low voltage circuits from voltage transients, ground loops, and EMI. Transfers signals optically by linking an LED input to a photosensitive output device, enabling data transfer without a direct electrical connection. Benefits include improved safety, reduced noise coupling, and the ability to interface circuits that operate at different supply voltages. Key attributes to consider Function: isolation performance and reliable signal transfer Compatibility: supports common digital logic levels and microcontroller interfaces Size: compact packages suitable for through hole and surface mount designs Material: encapsulated plastic packages with a defined isolation barrier Performance: isolation voltage ratings, switching speed, and operating temperature range Use scenarios Isolating a microcontroller input from a voltage motor drive or power supply to protect the controller Interfacing PLC inputs/outputs with field sensors in industrial automation to prevent ground loops and noise transfer Isolating data or control lines in data acquisition or control systems subjected to electrical noise or voltage spikes Notes Availability of different output types and ratings varies by model; refer to the specific product datasheet for exact specifications and footprint information.