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Optoisolators - Triac, SCR Output

The IL4218-X016 is a TRIAC and SCR output optoisolator from Vishay. It utilizes an industry-standard design, that automatically senses multiple switching cycles, making it ideal for applications such as temperature and timing control. This optoisolator also features a wide input voltage range, making it suitable for most general purpose switching requirements.

Application Field

The IL4218-X016 optoisolator is suitable for a wide variety of application solutions. It is often used in demanding applications where good electrical isolation exists between the input and output, thus providing an extra layer of protection for the system under control. It is suitable for use in switching applications such as process control, temperature control, time control, and frequency control. It can also be employed in any system requiring superior isolation and reliable operation.

Working Principle

The IL4218-X016 optoisolator operates in a unique way, by combining an infrared LED with an integrated transistor and TRIAC or SCR output. The infrared LED emits an invisible light beam that is picked up by the integrated transistor. When the LED is energized, the transistor reacts to the light beam and takes the necessary action, thus controlling the TRIAC or SCR output. The output from the optoisolator can switch up to 200 Volts at a current of 1 Amp.

Conclusion

The IL4218-X016 optoisolator delivers superior performance in demanding applications, and can provide reliable operation in harsh environments. Its wide input voltage range makes it suitable for most general purpose switching needs while its automatic voltage sensing capability makes it ideal for certain high-voltage applications. It is perfect for use in temperature control, timing control, and frequency control applications, and it offers an extra layer of isolation between the input and output for enhanced safety and reliability.

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