The 817B Optocouplers DIP-4 RoHS manufactured by Youtai is an electronic component used to transfer isolated signals, often across long distances. It features a GaAs infrared LED light source, which is optically coupled with a phototransistor. It is constructed using optically isolated standard DIP-4 RoHS compliant packages and allows for bidirectional AC/DC transfer. This component has been designed with environmental protection in mind and has high isolation voltage and low propagation delay. It is highly reliable, and is suitable for automation, digital control, medical, and consumer products.