MOC3043SM

Triac, SCR Output Optoisolators Overview

The MOC3043SM is a single-channel optocoupler from the MOC304 series, featuring a Gallium Arsenide infrared LED coupled to a monolithic silicon photo-triac detector. It includes an integrated zero-crossing detection circuit for low electromagnetic interference switching. The device supports surface-mount installation in a 6-pin SMD-DIP package. Key electrical parameters include a maximum isolation voltage of 5250 Vrms and a peak off-state voltage (VDRM) of 400 V. It operates within a temperature range of -40°C to +85°C with a maximum forward current of 60 mA.

Triac, SCR Output Optoisolators Feature Summary

• Integrated zero-crossing detection circuitry minimizes electrical noise during AC load switching
• Monolithic silicon photo-triac output provides robust isolation between input and control circuits
• Surface-mount packaging facilitates automated assembly and compact board design

Triac, SCR Output Optoisolators Applications

• Solid-state relay driver circuits
• AC power switching applications
• Industrial motor control systems
• Lighting dimmer controls

Triac, SCR Output Optoisolators Procurement Notes

Verify that the specific suffix 'SM' corresponds to the required surface-mount package variant rather than through-hole alternatives. Confirm that the manufacturer designation aligns with Isocom Components specifications, as some distributors may list onsemi equivalents. Ensure the zero-crossing functionality meets the specific timing requirements of the target AC application before finalizing procurement orders.

Triac, SCR Output Optoisolators Selection Notes

Select this component when low-noise AC switching is critical due to its built-in zero-crossing feature. The 400 V rating suits standard low-voltage AC loads but requires verification for higher voltage industrial applications. Consider the thermal dissipation limits of the SMD package if operating near the maximum junction temperature. Compare trigger current requirements against the driving logic level to ensure reliable activation without excessive input current draw.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC304 series of triac output optocouplers designed for general-purpose AC switching. It serves as an alternative to legacy DIP versions by offering a surface-mount footprint while maintaining similar electrical characteristics. The series is widely used in consumer electronics and industrial equipment requiring galvanic isolation for AC control signals.

Triac, SCR Output Optoisolators Replacement Considerations

Direct substitutes include the MOC3041SM and MOC3042SM from compatible manufacturers, provided they share identical pinouts and zero-crossing specifications. Verify that any replacement maintains the same 5250 Vrms isolation rating and 400 V blocking voltage to ensure circuit safety compliance.