MOC3021SM

Triac, SCR Output Optoisolators Overview

The MOC3021SM is a six-pin surface-mount DIP random-phase triac driver optocoupler manufactured by onsemi. It features an infrared emitting diode coupled to a photo-triac output, providing electrical isolation without zero-crossing detection. Key specifications include a maximum repetitive peak off-state voltage of 400V and an isolation voltage of 5300 Vrms. The device supports a forward current of 60 mA with a power dissipation of 330 mW, operating within a temperature range of -40°C to +85°C.

Triac, SCR Output Optoisolators Feature Summary

• Random-phase triggering capability for precise AC power control
• High insulation voltage ensuring robust circuit isolation
• Surface mount packaging for automated assembly integration

Triac, SCR Output Optoisolators Applications

• Incandescent lamp dimmers
• Static AC power switches
• Solenoid and valve controls
• Solid state relays

Triac, SCR Output Optoisolators Procurement Notes

Verify the manufacturer designation carefully, as this component is currently produced by onsemi following industry consolidation. Confirm that the specific suffix corresponds to the required surface mount package variant. Ensure compliance with RoHS directives and check for any obsolete status indicators from previous Fairchild Semiconductor production runs before finalizing procurement orders.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random-phase triac firing is required rather than zero-crossing switching. The 400V rating suits lower voltage AC applications compared to higher voltage variants. Consider the surface mount form factor for PCB space constraints. Verify thermal management requirements given the 330 mW power dissipation limit in enclosed environments.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC3021M series of triac driver optocouplers. It serves as the surface mount equivalent to through-hole versions like the MOC3021SR2M. The device provides galvanic isolation between low-voltage control circuits and high-voltage AC loads, commonly used in consumer electronics and industrial automation systems requiring reliable solid-state switching.

Triac, SCR Output Optoisolators Replacement Considerations

The MOC3021SM is functionally compatible with other random-phase triac drivers in the same voltage class. Cross-reference datasheets for pinout compatibility and thermal characteristics when substituting. Note that some distributors may list older Fairchild branding for inventory purposes.