MOC3051SR2M

Triac, SCR Output Optoisolators Overview

The MOC3051SR2M is a random-phase triac driver optocoupler manufactured by onsemi. It features a single channel with a photo-triac output, designed for surface-mount installation in a 6-pin SMD-DIP package. The device provides an isolation voltage of 4170 Vrms and supports a peak off-state voltage (VDRM) of 600 V. Key electrical parameters include a maximum forward current of 60 mA, a forward voltage of 1.18 V, and a power dissipation of 330 mW. It operates within a temperature range of -40°C to +85°C and has a maximum trigger current of 15 mA.

Triac, SCR Output Optoisolators Feature Summary

• Random-phase triggering capability for precise AC load control without zero-crossing synchronization
• High insulation voltage of 4170 Vrms ensuring robust safety isolation between input and output circuits
• Integrated photo-triac output stage capable of driving triacs or SCRs directly
• Surface-mount packaging optimized for automated assembly and compact PCB layouts

Triac, SCR Output Optoisolators Applications

• Solid-state relay (SSR) designs requiring random-phase switching
• AC motor speed control systems
• Lighting dimmer applications for incandescent or resistive loads
• Industrial process control interfaces for AC power regulation

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'SR2M' to confirm the surface-mount tape-and-reel packaging variant. Ensure compatibility with the target PCB footprint for the 6-SMD package. Confirm that the 600 V peak off-state voltage rating meets the circuit requirements. Check RoHS compliance status if environmental regulations apply to the final product assembly.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random-phase firing is required rather than zero-crossing switching. The 600 V rating suits standard AC line voltages up to 240 V RMS. Consider the 15 mA maximum trigger current for LED drive circuit design. The SMD form factor is suitable for high-density manufacturing processes compared to through-hole alternatives.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC305x series of triac driver optocouplers from onsemi. It is functionally similar to the MOC3051 but distinguished by its specific surface-mount packaging and reel configuration. The series is widely used in AC power control applications where galvanic isolation is necessary between low-voltage logic and high-voltage AC lines.

Triac, SCR Output Optoisolators Replacement Considerations

The MOC3052SR2M is a related variant within the same family, differing primarily in its zero-crossing detection feature. Verify if random-phase operation is strictly required before substituting with zero-crossing models. Other pin-compatible options may exist but require verification of electrical ratings and trigger characteristics.