MOC3051SM

Triac, SCR Output Optoisolators Overview

The MOC3051SM is a random-phase Triac driver optocoupler featuring a single channel with a PhotoTriac output. It provides an isolation voltage of 4170 Vrms and supports a peak off-state output voltage of 600 V. The device operates within a temperature range of -40°C to +85°C, with a maximum forward current of 60 mA and a power dissipation of 330 mW.

Triac, SCR Output Optoisolators Feature Summary

• Random-phase triggering capability for precise AC power control applications
• High insulation voltage ensuring robust electrical isolation between input and output circuits
• Integrated PhotoTriac output designed for direct driving of triacs and SCRs

Triac, SCR Output Optoisolators Applications

• Solid state relays
• Motor speed controls
• Lighting dimmers

Triac, SCR Output Optoisolators Procurement Notes

Verify the manufacturer designation on the component marking, as this part is produced by both Fairchild Semiconductor and onsemi. Confirm the package style matches the required SMD configuration. Ensure compliance with RoHS standards and check for specific regulatory approvals such as UL or VDE if required for the end application safety certification.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random-phase triggering is required rather than zero-crossing switching. Ensure the circuit design accommodates the 600 V peak blocking voltage of the output stage. Verify that the input forward current requirements align with the LED drive capabilities of the controlling microcontroller or logic circuit.

Triac, SCR Output Optoisolators Part Context

This device belongs to the MOC3051M series of Triac and SCR output optocouplers. It is functionally similar to other members of the family but distinguished by its surface-mount DIP-6 packaging. The series is widely used in industrial and consumer electronics for isolated AC power switching.

Triac, SCR Output Optoisolators Replacement Considerations

The MOC3052SM is a comparable alternative offering zero-crossing detection instead of random phase. For pin-compatible replacements, verify the specific trigger current and isolation voltage ratings of candidate parts against the original datasheet specifications.