MOC3051SR2VM

Triac, SCR Output Optoisolators Overview

The MOC3051SR2VM is a random-phase triac driver optocoupler manufactured by onsemi. It integrates a gallium arsenide infrared emitting diode optically coupled to a non-zero-crossing silicon bidirectional AC switch. The device features a surface-mount SMD-6 package and provides an isolation voltage of 4170 Vrms. Key electrical parameters include a maximum forward current of 60 mA, a peak off-state voltage of 600 V, and a minimum static dV/dt of 1 kV/µs. It operates within a temperature range of -40°C to +85°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrates a GaAs infrared LED with a non-zero-crossing silicon bidirectional AC switch for random-phase triggering.
• Provides high isolation capability with a rated isolation voltage of 4170 Vrms.
• Designed for surface-mount assembly in a compact 6-pin SMD package.

Triac, SCR Output Optoisolators Applications

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

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix SR2VM to confirm the surface-mount packaging and tape-and-reel delivery format. Ensure compatibility with RoHS standards and relevant safety certifications such as UL 1577 or DIN EN/IEC 60747-5-5. Confirm that the random-phase output characteristic aligns with the noise immunity requirements of the target application compared to zero-crossing variants.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random-phase triggering is required rather than zero-crossing switching. The SMD-6 package is suitable for automated surface-mount assembly processes. Consider the 600 V peak off-state voltage rating to ensure it exceeds the maximum line voltage in the AC circuit. Verify that the 60 mA forward current limit is sufficient for the driving logic interface.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC305x series of triac driver optocouplers from onsemi. It serves as a surface-mount alternative to through-hole DIP versions like the MOC3051M. The series is designed for general-purpose AC power control applications requiring galvanic isolation between low-voltage control circuits and high-voltage AC loads.

Triac, SCR Output Optoisolators Replacement Considerations

Direct pin-compatible replacements include other MOC3051 variants with different packaging, such as MOC3051M (DIP) or MOC3051S (SOIC). Cross-reference with MOC3052 series devices if zero-crossing functionality is acceptable, though electrical characteristics differ significantly.