FOD4218

Triac, SCR Output Optoisolators Overview

The FOD4218 is a single-channel triac output optocoupler featuring an infrared emitting diode coupled to a hybrid random phase triac. It provides 5000 Vrms isolation and supports a maximum continuous on-state current of 300 mA with an off-state voltage of 800 V. The device operates within a temperature range of -55°C to +100°C, utilizes a 6-pin DIP package, and requires a forward current of 30 mA with a typical trigger current of 1.3 mA.

Triac, SCR Output Optoisolators Feature Summary

• Random phase triac output for flexible AC load control
• High insulation voltage capability for safety isolation
• Snubberless operation design simplifies circuit requirements

Triac, SCR Output Optoisolators Applications

• Solid state relays
• Motor control circuits
• Industrial process control systems

Triac, SCR Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., SDV) against the required packaging format such as reel or cut tape. Confirm RoHS compliance status and UL recognition requirements for the target market. Ensure the selected variant matches the necessary thermal dissipation specifications for the intended operating environment.

Triac, SCR Output Optoisolators Selection Notes

Select this component when random phase triggering is acceptable for the AC load application. Consider the 300 mA current limit and 800 V blocking voltage for suitability. Evaluate the 6-pin DIP footprint constraints against available PCB space. Verify that the snubberless characteristic aligns with the system's noise immunity requirements.

Triac, SCR Output Optoisolators Part Context

Part of the FOD420 series including FOD420, FOD4208, and FOD4216. Shares common architectural features like the hybrid triac structure. Differentiates via specific trigger sensitivity and packaging options within the family.

Triac, SCR Output Optoisolators Replacement Considerations

FOD4216 is a documented substitute within the same series offering similar functionality.