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Zero-cross optotriac driver

MOC3063 Internal Circuitry

Explore the internal circuitry and functional stages of MOC3063.

Package view

Inside MOC3063

Infrared emitter, zero-cross detector and bilateral switch.

MOC3063 compact cutaway inputLED1and2,output4and6,pins3and5leftopen.
Functional organization, not a die photograph. Input and output have no conductive signal link.

Explore the circuit

Select a stage to see its role and connections

Optical input

The LED converts current into infrared light.

Insulating barrier

Only the optical signal crosses the package barrier.

Bilateral output

Zero-cross inhibition qualifies turn-on; output current controls turn-off.

Component view