IL4108-X007T

Overview

The IL4108-X007T is a single-channel phototriac optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a Gallium Arsenide infrared LED with a photosensitive zero-crossing TRIAC network, providing electrical isolation rated at 5300Vrms. The device features an SMD-6 surface-mount package and operates within a temperature range of -55°C to 100°C. Key electrical specifications include a maximum forward current of 60mA and a typical forward voltage of 1.16V. This component is designed for applications requiring high dv/dt immunity and precise zero-crossing switching capabilities.

Feature Summary

• Integrates a GaAs IR LED with a photosensitive zero-crossing TRIAC network for synchronized switching
• Provides high-voltage electrical isolation rated at 5300Vrms between input and output circuits
• Features high dv/dt immunity to prevent false triggering in noisy environments
• Utilizes a compact SMD-6 surface-mount package for automated assembly

Applications

• Solid-state relay (SSR) driver circuits
• Mains-powered appliance control systems
• Industrial motor control interfaces
• High-voltage switching protection circuits

Procurement Notes

Verify the specific suffix X007T corresponds to the required tape-and-reel packaging configuration. Confirm that the 5300Vrms isolation rating meets the safety agency requirements for your target market. Ensure the operating temperature range of -55°C to 100°C aligns with the environmental conditions of the final application. Cross-reference the datasheet for specific derating curves regarding forward current and power dissipation.

Selection Notes

Select this component when zero-crossing detection is critical to minimize electromagnetic interference during AC load switching. The integrated photosensitive TRIAC simplifies circuit design by eliminating external snubber networks in many applications. Consider the SMD-6 footprint constraints and thermal management requirements for high-density PCB layouts. Verify compatibility with the driving LED current limits specified in the official documentation.

Part Context

This part belongs to the IL410/IL4108 family of Vishay phototriac optocouplers. These devices are engineered for robust performance in AC power control applications. The family shares common architectural features including the GaAs LED source and photosensitive TRIAC output stage. The X007T designation specifically identifies the packaging and reel configuration for this particular variant.

Replacement Considerations

Direct pin-to-pin replacements should be verified against the official Vishay substitution guide. Alternative components must match the 5300Vrms isolation rating and zero-crossing functionality. Ensure any substitute maintains the same SMD-6 package dimensions and thermal characteristics.

FAQ

What is the primary function of the internal TRIAC network?

The internal photosensitive TRIAC network provides electrical isolation and switches AC loads only when the mains voltage crosses zero, reducing electrical noise and stress on the load.

How does the device achieve high dv/dt immunity?

The integrated design of the GaAs IR LED and the photosensitive TRIAC network minimizes parasitic capacitance and ensures stable operation even under rapid voltage changes across the output terminals.