The PC817 is an optocoupler designed to provide electrical isolation between input and output circuits using an infrared LED and phototransistor.
It enables safe signal transfer while preventing high-voltage transients from affecting low-voltage control circuits.
The device supports DC and low-frequency signal isolation in digital and analog systems.
Its DIP-4 package allows easy through-hole mounting and compact PCB layout.
This set includes two identical optocouplers suitable for prototyping and isolation applications.