FODM3021R3

Triac, SCR Output Optoisolators Overview

The FODM3021R3 is a Triac output optocoupler manufactured by onsemi, designed for driving Triacs and SCRs in AC power control applications. It features a single channel with no zero-crossing circuit, providing flexible phase-angle control capabilities. The device utilizes a Miniflat surface-mount package (4-SMD, Gull Wing) to facilitate automated assembly. Key electrical specifications include a maximum continuous output current of 70 mA and a peak off-state voltage (VDRM) of 400 V. The input side supports a maximum forward current of 60 mA with a typical forward voltage of 1.2 V. High isolation performance is ensured by a 3750 Vrms insulation voltage rating.

Triac, SCR Output Optoisolators Feature Summary

• Provides high-voltage isolation between control circuits and AC power loads via an internal LED and phototriac structure.
• Enables precise phase-angle triggering for AC power regulation without integrated zero-crossing detection logic.
• Designed for surface-mount technology integration using a compact Miniflat package format.

Triac, SCR Output Optoisolators Applications

• AC motor speed control systems
• Solid-state relay driver circuits
• Lighting dimmer modules

Triac, SCR Output Optoisolators Procurement Notes

Verify component availability status carefully as the FODM3021R3 is listed as obsolete or end-of-life by the manufacturer. Sourcing may require checking distributor stock levels or secondary market channels rather than direct factory orders. Confirm RoHS compliance documentation and material composition declarations are available for regulatory adherence. Validate that the specific reel quantity matches production requirements before finalizing acquisition plans.

Triac, SCR Output Optoisolators Selection Notes

Select this component when phase-angle control is required rather than zero-crossing switching. Ensure the load voltage does not exceed the 400 V off-state rating. Verify that the PCB layout accommodates the Miniflat footprint and thermal dissipation needs. Consider the 60 mA input current limit when designing the drive circuitry. Evaluate alternative active models if long-term supply stability is critical for the product lifecycle.

Triac, SCR Output Optoisolators Part Context

This part belongs to the FODM30 series of Triac output optocouplers from onsemi. It shares architectural similarities with variants like the FODM3021R2 and FODM3022R3, differing primarily in packaging or tape/reel configuration. The series targets industrial and consumer AC power management applications requiring galvanic isolation. The FODM3021R3 specifically addresses the need for reliable SCR/Triac triggering in compact electronic assemblies.

Triac, SCR Output Optoisolators Replacement Considerations

Direct substitutes include the FODM3021R2, which offers identical electrical characteristics but may differ in packaging or reel specifications. Cross-reference pinouts and thermal parameters to ensure mechanical compatibility during board-level replacement.