MOC3031M

Triac, SCR Output Optoisolators Overview

The MOC3031M is a zero-crossing triac driver output optocoupler manufactured by onsemi. It features a single channel with a photo-triac output and is housed in a 6-pin DIP package designed for through-hole mounting. The device provides an isolation voltage of 5250 Vrms and operates within a temperature range of -40°C to +85°C. Key electrical parameters include a maximum forward current of 60 mA, a peak off-state voltage of 250 V, and a maximum trigger current of 15 mA. It complies with UL 1577 and DIN EN/IEC 60747-5-5 standards.

Triac, SCR Output Optoisolators Feature Summary

• Integrates a zero-crossing detection circuit to minimize electromagnetic interference during switching operations.
• Provides high-voltage isolation between input and output circuits via a photo-triac architecture.
• Designed for robust performance across extended industrial temperature ranges.

Triac, SCR Output Optoisolators Applications

• Solid-state relay control circuits
• AC power switching applications
• Industrial motor control systems

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific ordering suffix against official documentation to ensure correct packaging and compliance status. Confirm that the selected variant matches the required insulation class and regulatory certifications for your target market. Cross-reference the manufacturer's latest datasheet to validate pinout configurations and thermal characteristics before finalizing procurement specifications.

Triac, SCR Output Optoisolators Selection Notes

Select this component when zero-crossing functionality is required to reduce electrical noise in AC load control. Ensure the application voltage does not exceed the 250 V peak rating of the internal triac. Verify that the PCB layout supports the 6-pin DIP footprint and that the operating environment remains within the specified -40°C to +85°C range for reliable long-term operation.

Triac, SCR Output Optoisolators Part Context

This part belongs to the MOC series of optocouplers from onsemi, which are widely used for isolating low-voltage control signals from high-voltage AC loads. The MOC3031M specifically targets applications requiring precise timing synchronization with AC line cycles to prevent inrush currents and radio frequency interference common in non-zero-crossing designs.

Triac, SCR Output Optoisolators Replacement Considerations

Direct substitutes may include other zero-crossing triac driver optocouplers from the same family or competitors offering identical pinouts and electrical ratings. Verify compatibility regarding isolation voltage, trigger current thresholds, and package dimensions before substitution.

Triac, SCR Output Optoisolators FAQ

What is the purpose of the zero-crossing feature in the MOC3031M?

The zero-crossing circuit ensures that the internal triac turns on only when the AC voltage crosses zero, minimizing inrush current and reducing electromagnetic interference (EMI) generated during switching.

What is the maximum peak off-state voltage for this device?

The MOC3031M has a maximum peak off-state voltage (VDRM) of 250 V, making it suitable for lower voltage AC applications.