FOD4208SDV

Triac, SCR Output Optoisolators Overview

The FOD4208SDV is a single-channel, random-phase Triac output optocoupler manufactured by onsemi. It integrates an infrared emitting diode with a hybrid triac in a surface-mount SMD-DIP-6 package. Key electrical parameters include a maximum continuous output current of 300 mA and an off-state voltage (VDRM) of 800 V. The device provides 5000 Vrms isolation voltage between input and output. It operates without a zero-crossing circuit, featuring a typical turn-on time of 60 µs. The forward current is rated at 30 mA with a forward voltage of 1.28 V. Power dissipation is 500 mW, and the operating temperature range spans from -55°C to +100°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrates an infrared LED coupled to a hybrid random phase Triac for snubberless operation
• Provides high isolation capability with 5000 Vrms insulation voltage rating
• Designed for direct AC load control without requiring external zero-crossing detection circuits

Triac, SCR Output Optoisolators Applications

• Solid state relay driver circuits
• AC motor speed control systems
• Industrial process control interfaces

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'SDV' against the official onsemi datasheet to confirm the exact tape-and-reel packaging configuration and pinout orientation. Ensure that the 800 V off-state voltage rating aligns with the peak line voltage requirements of the target application. Cross-reference the SMD-DIP-6 package dimensions with the PCB footprint library to guarantee mechanical compatibility during assembly.

Triac, SCR Output Optoisolators Selection Notes

Select this component when snubberless operation is required for random-phase Triac triggering. The 800 V blocking voltage suits standard industrial AC lines. Verify that the 300 mA continuous current rating exceeds the load requirements. Consider the 5000 Vrms isolation if galvanic separation is critical. Confirm that the absence of zero-crossing functionality matches the dimming or switching strategy of the design.

Triac, SCR Output Optoisolators Part Context

This part belongs to the FOD420 series, which includes variants like FOD420, FOD4216, and FOD4218. These devices share the same core architecture of an IR LED coupled to a hybrid Triac. The FOD4208SDV specifically denotes the random-phase variant in the SMD-DIP-6 package. This family is designed for general-purpose AC power switching applications requiring reliable isolation and compact form factors.

Triac, SCR Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.