MOC3021S-TA1

Triac, SCR Output Optoisolators Overview

The MOC3021S-TA1 is a single-channel triac output optocoupler manufactured by Lite-On Inc. It features an SMD-6 gull wing package and lacks zero-crossing circuitry. Key electrical parameters include a maximum isolation voltage of 5000 Vrms, a peak off-state output voltage (Vdrm) of 400 V, and a forward current (If) rating of 50 mA. The device operates within a temperature range of -40°C to +100°C, with a power dissipation capacity of 330 mW and a typical forward voltage of 1.15 V.

Triac, SCR Output Optoisolators Feature Summary

• Provides high-voltage electrical isolation between input control circuits and output triac loads
• Designed for direct driving of AC-powered devices without zero-crossing detection
• Utilizes surface-mount technology for automated assembly integration

Triac, SCR Output Optoisolators Applications

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

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix TA1 against official Lite-On documentation to confirm tape and reel packaging specifications. Ensure that the absence of zero-crossing functionality aligns with the target application requirements, as this variant differs from ZC versions in the MOC302x series. Cross-reference the 6-SMD gull wing footprint with PCB design files prior to procurement.

Triac, SCR Output Optoisolators Selection Notes

Select this component when surface-mount assembly is required for non-zero-crossing triac triggering. Compare the 400 V Vdrm rating against the peak line voltage of the load. Consider thermal management due to the 330 mW power dissipation limit. Verify compatibility with the driving logic levels relative to the 1.15 V forward voltage drop.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC302x series of triac driver optocouplers. Unlike the through-hole MOC3021, the MOC3021S-TA1 utilizes a surface-mount package. It shares functional similarities with other non-ZC variants but is distinct in its physical form factor and packaging method, catering to modern PCB manufacturing processes.

Triac, SCR Output Optoisolators Replacement Considerations

MOC3021S is a compatible pin-for-pin alternative offering identical electrical characteristics in a standard SMD configuration. MOC3020 serves as a through-hole equivalent within the same family.