IL4118-X017T

Overview

The IL4118-X017T is a zero-crossing triac output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates an AlGaAs infrared LED with a photosensitive TRIAC network in an 8-SMD package. Key electrical parameters include a 5300 Vrms isolation voltage, 10 mA maximum forward current, and 1.4 V typical forward voltage. The device supports a 50 mA output current and operates within a temperature range of -40°C to +100°C.

Feature Summary

• Integrates an AlGaAs infrared LED with a photosensitive zero-crossing TRIAC network for precise AC load control
• Provides high-voltage isolation capability rated at 5300 Vrms between input and output circuits
• Features built-in zero-crossing detection to minimize electromagnetic interference during switching

Applications

• Solid-state relay (SSR) designs requiring low noise operation
• Motor control circuits for AC loads
• Lighting control systems for incandescent or resistive loads

Procurement Notes

Verify the specific suffix X017T against the manufacturer's latest datasheet to confirm packaging and reel specifications. Confirm component availability status as distribution channels may list obsolete or end-of-life inventory. Ensure compliance with RoHS directives and relevant safety certifications such as VDE or UL before integration into certified equipment.

Selection Notes

Select this component when zero-crossing switching is required to reduce electrical noise in AC power applications. The 5300 Vrms isolation rating suits high-voltage industrial environments. Verify that the 50 mA output current capacity meets the gate drive requirements of the connected TRIAC or SCR. Ensure the operating temperature range aligns with the system's thermal constraints.

Part Context

This part belongs to the IL4116/IL4117/IL4118 family of Vishay optocouplers. These devices are designed for general-purpose AC switching applications where low EMI is critical. The family shares similar internal architectures but may vary in specific ratings or packaging options. The IL4118 specifically denotes the zero-crossing variant within this series.

Replacement Considerations

Direct substitutes include other Vishay zero-crossing triac optocouplers from the same family, such as the IL4116 or IL4117, provided pinout and electrical ratings match. Cross-brand replacements require verification of isolation voltage, CTR, and package dimensions.