4N35 Optocoupler Phototransistor IC (DIP-6)

The PC817-based optocoupler modules already in the catalog cover breakout-board isolation jobs well, but a bare chip like the 4N35 is the better fit when a design needs that same light-based isolation soldered directly into a compact custom circuit. Its DIP-6 package carries an LED and phototransistor pair sealed together, passing a signal across an isolation barrier without ever connecting the two sides electrically, protecting sensitive logic from noise, ground loops, or voltage differences on the other side.