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MOC3021 Non-Zero Crossing Triac Driver Optocoupler

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The MOC3021Series consists of gallium arsenide infrared emitting diodes, optically coupled to a silicon bilateral switch. To order devices that are tested and marked per VDE 0884 requirements, the suffix ”V” must be included at end of part number. VDE 0884 is a test option. They are designed for applications requiring isolated triac triggering.


  • 400 V Phototriac Driver Output
  • Gallium-Arsenide-Diode Infrared Source and Optically-Coupled Silicon Traic Driver (Bilateral Switch)
  • UL Recognized . . . File Number E65085
  • High Isolation . . . 7500 V Peak
  • Output Driver Designed for 220 Vac
  • Standard 6-Terminal Plastic DIP
  • Directly Interchangeable with Motorola MOC3020, MOC3021, MOC3022, and MOC3023


  • Solenoid/Valve Controls
  • Static AC Power Switch
  • Lamp Ballasts
  • Solid State Relays
  • Interfacing Microprocessors to 115 Vac Peripherals
  • Incandescent Lamp Dimmers
  • Motor Controls

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