MOC3021TM

Triac, SCR Output Optoisolators Overview

The MOC3021TM is a Triac and SCR output optocoupler from onsemi, housed in a 6-pin PDIP package. It features a non-zero-crossing PhotoTriac output for phase control applications. Key electrical parameters include an isolation voltage of 5300 Vrms (per RS data) or 4170 Vrms (per DigiKey), a maximum forward current of 60 mA, and a peak forward voltage of 1.15 V to 1.5 V. The device operates within a temperature range of -40°C to +85°C and provides one channel of isolation.

Triac, SCR Output Optoisolators Feature Summary

• Non-zero-crossing triac output design suitable for phase-angle firing
• High isolation voltage capability for safety-critical circuits
• Through-hole mounting in a standard DIP-6 package

Triac, SCR Output Optoisolators Applications

• Solid-state relay driver circuits
• AC motor speed control systems
• Lighting dimmer applications

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'M' against the required datasheet revision, as it may denote specific packaging or testing variations. Confirm that the obsolete status does not impact long-term supply chain requirements. Ensure the selected substitute maintains identical pinout and electrical characteristics to avoid redesign efforts.

Triac, SCR Output Optoisolators Selection Notes

Select this component when non-zero-crossing switching is required for AC loads. Compare the isolation voltage rating (4170Vrms vs 5300Vrms) across different sources to ensure compliance with safety standards. Verify the peak forward voltage drop matches the driving circuit's power budget constraints.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC3021 series of triac output optocouplers. It is functionally similar to the MOC3021M but carries the 'T' suffix, which typically indicates tube packaging. The series is designed for general-purpose AC power control where precise zero-crossing timing is not necessary.

Triac, SCR Output Optoisolators Replacement Considerations

The MOC3021TVM is listed as a direct substitute by distributors. Verify if the 'V' suffix implies tape-and-reel packaging instead of tubes. Ensure the substitute meets the same isolation voltage and thermal specifications.