BETAMOC3063Zero-cross optotriac driver
Light transfers the command. Zero-cross logic chooses the turn-on window.
MOC3063 is an optically isolated triac-driver family. An infrared LED transfers a command to a bilateral output switch without a conductive signal connection between the two sides. The selected onsemi MOC3063M has a 600 V peak off-state output rating. Its zero-cross circuit inhibits triggering while the output voltage is too large. This suits whole-cycle AC switching, but it is not a random-phase dimmer driver. The 5 mA maximum trigger-current test is specified at 3 V across the main terminals and 25°C. Both DIP MOC3063M and gullwing MOC3063SR2M SMD versions retain all six physical pins. Pin 3 is unused and pin 5 is a substrate connection that must remain open. The example uses a small isolated AC source and resistor load to explain optical switching without a mains connection.
