FOD4118T

Triac, SCR Output Optoisolators Overview

The FOD4118T is a high dv/dt zero-cross triac driver optoisolator manufactured by onsemi. It integrates an infrared emitting diode with a hybrid triac output, providing 5000Vrms isolation in a 6-DIP package. Key electrical parameters include a holding current of 500µA, turn-on time of 60µs, and forward voltage of 1.25V typical. The device supports a maximum DC forward current of 30mA, offers a static dV/dt of 10kV/µs minimum, and operates within a temperature range of -55°C to 100°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrated zero-cross detection circuitry for precise switching control
• High noise immunity with minimum static dV/dt rating of 10kV/µs
• Hybrid triac output structure combining LED and triac components

Triac, SCR Output Optoisolators Applications

• Solid-state relay drivers
• Motor control systems
• Industrial power switching applications

Triac, SCR Output Optoisolators Procurement Notes

Verify component status as the FOD4118T is listed as obsolete and no longer manufactured. Confirm availability through authorized distributors or check for valid substitute part numbers such as the FOD4118TV. Ensure that any sourced units meet original specification requirements for isolation voltage and thermal performance before integration into designs.

Triac, SCR Output Optoisolators Selection Notes

Select this component when high dv/dt immunity and zero-crossing functionality are required for triac triggering. Consider the 6-DIP package constraints and operating temperature range of -55°C to 100°C. Evaluate the 5000Vrms isolation capability against system safety standards. Note that due to obsolescence, alternative sourcing strategies or pin-compatible replacements must be evaluated for long-term production viability.

Triac, SCR Output Optoisolators Part Context

The FOD4118T belongs to the FOD410/FOD4108/FOD4116/FOD4118 family of high dv/dt zero-cross triac drivers from onsemi. These devices are designed to provide reliable isolation between control circuits and high-power triac loads. The family shares similar architectural principles, utilizing an infrared LED coupled to a hybrid triac output for robust signal transmission across isolation barriers.

Triac, SCR Output Optoisolators Replacement Considerations

The FOD4118TV is identified as a similar substitute part number available from onsemi. Verify functional equivalence regarding isolation voltage, package dimensions, and electrical characteristics before substitution.