FOD4218T

Triac, SCR Output Optoisolators Overview

The FOD4218T is a single-channel Triac output optocoupler manufactured by onsemi. It features a high-efficiency infrared emitting diode paired with a Triac photodetector, housed in a standard 6-pin DIP package. The device provides an isolation voltage of 5000 Vrms and supports a maximum continuous on-state current of 300 mA. Key electrical parameters include a peak repetitive off-state voltage (VDRM) of 800 V, a forward current (IF) of 30 mA, and a forward voltage (Vf) of 1.28 V. It operates within a temperature range of -55°C to +100°C.

Triac, SCR Output Optoisolators Feature Summary

• High blocking voltage capability for robust circuit protection
• Snubberless operation suitable for random phase applications
• Enhanced trigger sensitivity via high-efficiency infrared LED

Triac, SCR Output Optoisolators Applications

• Solid-state relay control circuits
• Motor speed control systems
• Lighting dimmer applications

Triac, SCR Output Optoisolators Procurement Notes

Verify component status as the FOD4218T may be listed as obsolete or discontinued in certain distributor catalogs. Confirm availability through official onsemi channels or authorized partners. Ensure compliance with RoHS standards and check material composition declarations if required for specific manufacturing processes.

Triac, SCR Output Optoisolators Selection Notes

Select this component for applications requiring random phase triac triggering without zero-crossing detection. Consider the 800 V blocking voltage and 300 mA current rating for load compatibility. Verify that the 6-DIP package fits the PCB layout constraints and thermal requirements of the target design.

Triac, SCR Output Optoisolators Part Context

The FOD4218T belongs to the FOD420 series of 6-pin DIP Triac drivers from onsemi. This family includes variants like the FOD420, FOD4208, and FOD4216, which share similar packaging and basic functionality but may differ in specific electrical characteristics such as blocking voltage or trigger sensitivity.

Triac, SCR Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult onsemi's official replacement guides or contact technical support for valid cross-reference options.