FOD4218SV

Triac, SCR Output Optoisolators Overview

The FOD4218SV is a single-channel Triac output optocoupler from onsemi, featuring an infrared emitting diode coupled to a hybrid random phase triac. It operates without a zero-crossing circuit and supports surface mount installation in a 6-pin SMD-DIP package. Key electrical parameters include a maximum continuous output current of 300 mA, a blocking voltage (VDRM) of 800 V, and an isolation voltage of 5000 Vrms. The device has a forward current rating of 30 mA with a typical forward voltage of 1.28 V. Power dissipation is rated at 500 mW, and it functions within a temperature range of -55°C to +100°C.

Triac, SCR Output Optoisolators Feature Summary

• Integrates an infrared LED with a hybrid random phase triac for snubberless operation
• Provides high-voltage isolation via a 5000 Vrms insulation barrier
• Supports surface-mount technology in a compact 6-pin SMD-DIP configuration

Triac, SCR Output Optoisolators Applications

• Solid-state relay control circuits
• Motor control applications
• General purpose AC load switching

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix 'SV' corresponds to the required tape-and-reel or bulk packaging format as defined by onsemi standards. Confirm that the random phase triac characteristic aligns with the application's need for non-zero-crossing triggering. Ensure the 800 V blocking voltage meets the peak line voltage requirements of the target AC system.

Triac, SCR Output Optoisolators Selection Notes

Select this component when snubberless operation is required for random phase triac control. The 800 V blocking voltage suits standard AC mains applications. Verify that the 300 mA continuous current rating exceeds the load requirements. Consider the 6-pin SMD-DIP footprint for PCB layout compatibility and thermal management constraints.

Triac, SCR Output Optoisolators Part Context

The FOD4218SV belongs to the FOD4218 series of Triac and SCR output optocouplers. This series is designed for robust isolation in power control systems. The device utilizes a hybrid triac structure to ensure reliable switching performance. It is part of onsemi's portfolio of high-reliability optoisolators for industrial and consumer electronics.

Triac, SCR Output Optoisolators Replacement Considerations

The FOD4218 is a related variant within the same family. Verify pinout and electrical specifications before substitution. No other direct public substitutes are confirmed.