MOC3022 pinout & application note onsemi

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MOC3022 Pinout

The MOC3022 is a 6-pin optoisolator designed for triggering triacs without zero-crossing detection. It provides electrical isolation between a low-voltage control signal and a high-voltage AC load, making it ideal for interfacing microcontrollers with AC power devices. The following table outlines the detailed pin configuration and functional description for proper circuit integration.

Understanding the MOC3022 pinout is essential for safe and effective design in AC switching applications. Ensure the correct connection of the LED input (pins 1 and 2) and the main triac terminals (pins 4 and 6), and always leave the substrate pin (pin 5) unconnected to maintain device isolation and performance.

FAQ

1. What voltage and current ratings should be considered for the input side?

The input LED typically operates at 1.15V forward voltage and requires about 10–20mA forward current for reliable triggering.

2. What are the output load limitations of the MOC3022?

The MOC3022’s output can drive standard triacs and AC loads indirectly, but the exact load capacity depends on the external triac it controls, not the MOC3022 itself.

3. What precautions should be taken when designing with MOC3022?

Always observe proper LED current limiting on the input side, ensure pin 5 is left floating, and include appropriate external triac and snubber components on the output side for safe operation.