FOD4108

Triac, SCR Output Optoisolators Overview

The FOD4108 is a six-pin DIP high dv/dt zero-cross triac driver optocoupler from onsemi. It integrates an infrared emitting diode with a hybrid triac output, providing electrical isolation for AC power control applications. Key specifications include a 5000Vrms isolation voltage and an 800V blocking capability. The device features built-in zero-cross detection to minimize electromagnetic interference during switching. It supports a maximum forward current of 30 mA and operates within a temperature range of -55°C to 100°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrated zero-cross detection circuitry for low-noise AC switching
• High dv/dt noise immunity for reliable operation in harsh environments
• Hybrid triac output structure combining speed and robustness
• Single-channel design with standard 6-DIP through-hole packaging

Triac, SCR Output Optoisolators Applications

• Solid-state relay (SSR) modules
• AC motor speed control systems
• Industrial process control interfaces
• General-purpose AC power switching circuits

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix against official documentation to confirm package type and tape/reel configuration. Ensure the selected variant matches the required isolation voltage and thermal characteristics for the target application environment. Cross-reference the manufacturer's latest datasheet to confirm compliance with current environmental directives and marking requirements before finalizing procurement orders.

Triac, SCR Output Optoisolators Selection Notes

Select this component when high dv/dt immunity and precise zero-crossing timing are critical for reducing electromagnetic interference in AC loads. The integrated hybrid triac offers superior performance compared to discrete solutions. Consider the 6-DIP package for ease of prototyping and manual assembly. Evaluate thermal dissipation requirements based on the expected load current and ambient operating conditions.

Triac, SCR Output Optoisolators Part Context

The FOD4108 belongs to onsemi's family of high-performance triac drivers designed for industrial and consumer AC control. It complements similar models like the FOD4108SD by offering a through-hole option. This series addresses the need for reliable isolation in power electronics where noise immunity and switching precision are paramount for system stability and safety compliance.

Triac, SCR Output Optoisolators Replacement Considerations

The FOD4108SD is a surface-mount equivalent within the same functional family. Verify pin compatibility and thermal management differences when transitioning between DIP and SMD packages. Consult official substitution lists for any updated variants that may offer improved availability or enhanced specifications while maintaining electrical equivalence.