MOC3043FVM

Triac, SCR Output Optoisolators Overview

The MOC3043FVM is a single-channel Triac output optocoupler manufactured by onsemi, designed for zero-crossing switching applications. It features a PhotoTriac output capable of handling up to 100 mA peak current with a maximum off-state voltage of 400 V. The device provides high isolation capability of 7500 Vpk and operates within a temperature range of -40 °C to +85 °C. Packaged in a surface-mount 6-SMD configuration, it integrates an internal zero-crossing circuit that activates at approximately 20 V, ensuring low electromagnetic interference during AC load control.

Triac, SCR Output Optoisolators Feature Summary

• Integrates a zero-crossing detection circuit to minimize electrical noise and surge currents when switching AC loads
• Provides robust galvanic isolation between input and output circuits for safety in high-voltage environments
• Utilizes a surface-mount package design suitable for automated assembly processes

Triac, SCR Output Optoisolators Applications

• Solid state relays for AC power switching
• Motor speed control circuits
• Lighting dimmer modules

Triac, SCR Output Optoisolators Procurement Notes

Verify component status as the MOC3043FVM is listed as obsolete by the manufacturer. Confirm availability through authorized distributors or secondary markets. Ensure compatibility with existing PCB footprints if substituting. Check for lead time variations due to limited production runs. Validate datasheet revisions before finalizing design specifications.

Triac, SCR Output Optoisolators Selection Notes

Select this component for applications requiring zero-crossing triac drive with surface-mount constraints. Consider the 400 V off-state voltage rating for appropriate line voltage support. Evaluate thermal management requirements given the 250 mW power dissipation limit. Compare isolation voltage ratings against system safety standards. Assess input trigger current requirements for microcontroller interface compatibility.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC304x series of zero-crossing triac output optocouplers from onsemi. It shares functional similarities with through-hole variants like the MOC3043M but differs in packaging technology. The series is widely used in industrial control systems where reliable AC switching and electrical isolation are critical. It serves as a bridge between low-voltage digital logic and high-voltage AC power stages.

Triac, SCR Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include MOC3043M (through-hole equivalent) and MOC3041M. Verify pinout compatibility and package dimensions before substitution. Ensure replacement parts meet the same isolation voltage and current rating requirements.