FOD4208S

Triac, SCR Output Optoisolators Overview

The FOD4208S is a six-pin snubberless random phase triac driver optocoupler manufactured by onsemi. It integrates an infrared emitting diode with a hybrid random phase triac output, designed for direct control of triacs and SCRs without external snubber circuits. The device provides high isolation voltage of 5000 Vrms and supports a maximum continuous output current of 300 mA. Key electrical parameters include a forward current of 30 mA, forward voltage of 1.28 V, power dissipation of 500 mW, and off-state voltage of 800 V. It operates within a temperature range of -55°C to +100°C.

Triac, SCR Output Optoisolators Feature Summary

• Snubberless design eliminates the need for external RC snubber networks in random phase applications
• High dv/dt noise immunity prevents false triggering during rapid voltage transients
• Integrated hybrid random phase triac output enables direct AC load switching

Triac, SCR Output Optoisolators Applications

• Solid state relays (SSR)
• Motor controls
• Lighting dimmers

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'S' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure the selected variant matches the required insulation voltage and thermal characteristics for the target application environment.

Triac, SCR Output Optoisolators Selection Notes

Select this component for applications requiring robust random phase triac driving without complex external protection circuitry. Consider the 6-pin DIP or SMD package availability based on PCB layout constraints and ensure the operating temperature range aligns with system requirements.

Triac, SCR Output Optoisolators Part Context

The FOD4208S belongs to the FOD420 series of high dv/dt random phase triac drivers from onsemi. This family includes variants like FOD420, FOD4216, and FOD4218, offering different current ratings and packaging options while maintaining similar core functionality for AC power control systems.

Triac, SCR Output Optoisolators Replacement Considerations

Compatible substitutes within the same family include FOD420, FOD4216, and FOD4218. Verify pinout compatibility and electrical parameter equivalence before substitution.