MOC3031FM

Triac, SCR Output Optoisolators Overview

The MOC3031FM is a Triac and SCR output optocoupler manufactured by onsemi, designed for zero-crossing triac driver applications. It features a PhotoTriac output with an insulation voltage of 5250 Vrms and a peak off-state voltage (VDRM) of 250 V. The device operates within a temperature range of -40°C to +85°C and utilizes a PDIP-6 through-hole package. Key electrical parameters include a maximum forward current of 60 mA, a forward voltage of 1.25 V, and a power dissipation of 250 mW. The unit incorporates a built-in zero-crossing circuit that activates at 20 V, ensuring low electromagnetic interference during switching.

Triac, SCR Output Optoisolators Feature Summary

• Integrated zero-crossing detection circuitry for reduced electromagnetic interference
• High isolation capability with 5250 Vrms insulation voltage rating
• PhotoTriac output structure compatible with AC load control

Triac, SCR Output Optoisolators Applications

• Solid-state relay (SSR) designs
• AC motor speed control circuits
• Lighting dimmer applications

Triac, SCR Output Optoisolators Procurement Notes

The MOC3031FM is listed as obsolete and no longer manufactured by onsemi. Distributors may offer limited remaining stock or indicate unavailability in specific regions. Verification of component authenticity and datasheet revisions is critical when sourcing from secondary markets. Ensure the selected substitute matches the original pinout and electrical specifications to maintain system integrity.

Triac, SCR Output Optoisolators Selection Notes

Select this component for AC switching applications requiring zero-crossing functionality to minimize noise. Verify that the 250 V peak off-state voltage meets the load requirements. Consider the PDIP-6 package constraints for PCB layout. Due to its obsolete status, evaluate alternative components with similar isolation ratings and output types before finalizing the design.

Triac, SCR Output Optoisolators Part Context

This part belongs to the Triac and SCR Output Optocouplers category from onsemi. It is specifically engineered for driving triacs in AC power control systems. The inclusion of a zero-crossing circuit distinguishes it from standard optotriacs, making it suitable for sensitive electronic loads where switching transients must be minimized.

Triac, SCR Output Optoisolators Replacement Considerations

DigiKey lists the MOC3031FM as obsolete with available substitutes. Cross-reference pinouts and electrical characteristics such as VDRM and isolation voltage when selecting alternatives.