MOC3081SR2M

Triac, SCR Output Optoisolators Overview

The MOC3081SR2M is a zero-crossing triac driver output optocoupler manufactured by Fairchild Semiconductor. It integrates an aluminum gallium arsenide infrared LED with a monolithic silicon detector to provide isolation between logic systems and AC power lines. The device features a peak off-state voltage of 800V and an isolation voltage of 4170Vrms. Key electrical parameters include a maximum forward current of 60mA, a typical forward voltage of 1.3V, and a maximum trigger current of 15mA. It operates within a temperature range of -40°C to +85°C and is housed in a surface-mount 6-SMD package.

Triac, SCR Output Optoisolators Feature Summary

• Integrates zero-crossing circuitry for precise timing control of triac firing
• Provides high-voltage isolation via monolithic silicon detector technology
• Designed for direct interface with logic systems and AC line-powered equipment

Triac, SCR Output Optoisolators Applications

• Solid state relays
• Industrial motor controls
• Solenoid drivers

Triac, SCR Output Optoisolators Procurement Notes

Verify the manufacturer designation on the component marking, as this part number is associated with Fairchild Semiconductor but may appear in catalogs listing Onsemi or other distributors due to corporate acquisitions. Confirm the specific suffix 'SR2M' corresponds to the surface-mount tape-and-reel packaging format rather than the through-hole DIP variant. Ensure compliance with RoHS standards if required for the assembly process.

Triac, SCR Output Optoisolators Selection Notes

Select this component when surface-mount assembly is required for zero-crossing triac applications. Compare the 800V blocking capability against the system's peak line voltage. Verify that the 15mA trigger current requirement aligns with the driving logic output capabilities. Consider the thermal dissipation limits of the SMD package relative to the ambient operating environment.

Triac, SCR Output Optoisolators Part Context

This device belongs to the MOC3081 series of zero-crossing optocouplers. It serves as a critical interface component for isolating low-voltage control circuits from high-voltage AC loads. The series is widely used in consumer appliances and industrial automation where reliable switching and noise immunity are essential for safe operation.

Triac, SCR Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include IL4108-X017.