MOC3031SDM

Triac, SCR Output Optoisolators Overview

The onsemi MOC3031SDM is a surface-mount triac output optocoupler featuring an integrated zero-crossing detection circuit. It provides electrical isolation between control and load circuits, rated for a peak repetitive off-state voltage of 400V. The device utilizes a gallium arsenide infrared LED coupled to a silicon photo-triac detector. Key electrical specifications include a minimum input trigger current of 5mA and a maximum holding current of 20mA. The unit offers high isolation voltage capability and operates within a temperature range of -40°C to +85°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrated zero-crossing detection circuitry for reduced electromagnetic interference during switching events
• High isolation voltage rating suitable for demanding industrial applications
• Surface-mount package design optimized for automated assembly processes

Triac, SCR Output Optoisolators Applications

• Solid-state relay driver circuits
• Industrial process control systems requiring isolated switching
• Consumer appliance motor and heater control interfaces

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'SDM' confirms the surface-mount variant against the standard through-hole MOC3031M. Ensure the procurement order explicitly references the correct package type to avoid integration errors with PCB footprints designed for DIP configurations.

Triac, SCR Output Optoisolators Selection Notes

Select this component when surface-mount technology is required for zero-crossing triac triggering. Compare the holding current and isolation ratings against system requirements. Consider thermal management capabilities inherent to the small outline package compared to larger through-hole alternatives.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC303x series of triac output optocouplers from onsemi. It shares functional similarities with other members like the MOC3031M but differs in physical packaging. The series is widely used for isolating low-voltage logic signals from high-voltage AC mains loads.

Triac, SCR Output Optoisolators Replacement Considerations

The MOC3031M is a direct functional equivalent in a through-hole package. Verify pin compatibility if transitioning between surface-mount and through-hole designs. Other zero-crossing triac optocouplers may require circuit adjustment due to differing trigger current specifications.