MOC3051TM

Triac, SCR Output Optoisolators Overview

The MOC3051TM is a random-phase TRIAC driver optocoupler manufactured by onsemi. It integrates an AlGaAs infrared emitting diode with a non-zero-crossing silicon TRIAC switch. The device provides electrical isolation between low-voltage logic circuits and high-voltage AC loads. Key specifications include a peak off-state voltage of 600 V, an isolation voltage of 4170 Vrms, and a maximum forward current of 60 mA. It operates within a temperature range of -40°C to +85°C and is housed in a 6-DIP package.

Triac, SCR Output Optoisolators Feature Summary

• Integrates an AlGaAs infrared LED optically coupled to a non-zero-crossing silicon TRIAC for random-phase triggering.
• Provides high-voltage isolation capability suitable for interfacing low-voltage logic with AC mains.
• Designed for direct driving of TRIACs in AC power control applications without requiring external zero-crossing detection.

Triac, SCR Output Optoisolators Applications

• Solid-state relays
• AC motor speed controls
• Lighting dimmers

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'TM' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Check the product lifecycle status as some sources indicate this part may be not recommended for new designs or discontinued. Ensure compliance with RoHS directives and verify insulation ratings required for the target application safety standards.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random-phase triggering is acceptable or required for the load. Compare the 600 V peak off-state voltage against the line voltage requirements. Consider the 4170 Vrms isolation rating for safety compliance. Evaluate thermal dissipation needs given the 330 mW power dissipation limit and operating temperature range up to 85°C.

Triac, SCR Output Optoisolators Part Context

The MOC3051TM belongs to the MOC305x series of TRIAC driver optocouplers from onsemi. This family typically includes variants like MOC3051M and MOC3052M, differing primarily in trigger sensitivity and package options. These devices are standard solutions for isolating control signals from triac gates in AC switching applications.

Triac, SCR Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers: MOC3051VM, MOC3051M.