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MOC3021SR2M from FSC,Fairchild Semiconductor

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MOC3021SR2M

Manufacturer: FSC, FAIRCHILD

6-Pin DIP 400V Random Phase Triac Driver Output Optocoupler

Partnumber Manufacturer Quantity Availability
MOC3021SR2M FSC, FAIRCHILD 2145 In Stock

Description and Introduction

6-Pin DIP 400V Random Phase Triac Driver Output Optocoupler # Introduction to the MOC3021SR2M Optocoupler  

The **MOC3021SR2M** is a high-performance optocoupler designed to provide reliable electrical isolation between low-voltage control circuits and high-voltage AC loads. This component integrates a gallium arsenide infrared LED and a light-activated silicon bilateral switch (TRIAC driver), making it an ideal solution for applications requiring safe and efficient AC power control.  

Key features of the MOC3021SR2M include:  
- **600V peak blocking voltage**, ensuring robust performance in AC switching applications.  
- **Isolation voltage of 5,000V RMS**, enhancing safety by preventing high-voltage transients from affecting control circuits.  
- **Zero-crossing detection**, which minimizes switching noise and reduces electromagnetic interference (EMI) by triggering the TRIAC at the optimal point in the AC waveform.  

Common applications include solid-state relays, motor controls, lighting systems, and industrial automation where precise AC load switching is required. The optocoupler’s compact DIP-6 package allows for easy integration into various circuit designs while maintaining high reliability.  

Engineers favor the MOC3021SR2M for its ability to simplify circuit isolation, improve system safety, and enhance noise immunity. Its zero-crossing capability ensures smoother operation of inductive and resistive loads, making it a versatile choice for both consumer and industrial electronics.  

By combining electrical isolation with efficient AC switching, the MOC3021SR2M remains a widely trusted component in power control applications.

Application Scenarios & Design Considerations

6-Pin DIP 400V Random Phase Triac Driver Output Optocoupler

Alternative Part Number

  • TLP3052 --: Optoisolated triac driver with similar 400V blocking voltage and zero-crossing-free operation, widely used as a direct functional replacement for MOC3021.
  • PC814 --: Phototriac coupler offering comparable isolation and trigger characteristics, suitable for driving external triacs in AC switching applications.
  • EL3021 --: Pin-compatible phototriac driver with equivalent 400V rating and low trigger current, commonly cross-referenced to the MOC3021 series.
  • TLP3021 --: Pin-compatible optocoupler triac driver with similar 400V blocking voltage and 7.5mA trigger current, widely used as a direct substitute for MOC3021.

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