What are the key applications for the IL4108?

It is ideal for solid-state relays, lighting controls, temperature controls, solenoid/valve controls, and AC motor drives.

What is the significance of the zero-crossing feature?

The zero-crossing circuit ensures the triac turns on only when the AC voltage is near zero, which minimizes electromagnetic interference (EMI) and reduces inrush current.

What should be considered when using the IL4108 with inductive loads?

For inductive loads with a power factor below 0.8, a snubber circuit (RC network) is recommended to limit the commutating dV/dt and prevent the triac from failing to turn off.

What is the pinout of IL4108?

Use the IL4108 datasheet for the official pinout diagram and pin names. In PartGenie, ask Datasheet AI about IL4108 pinout to locate pins, power rails, and interface signals before layout.

IL4108 Datasheet, Specs, Alternatives & ECAD | Vishay Semiconductor Opto Division

AI summary

The IL4108 is a high-performance, zero-crossing optocoupler designed for robust AC load control in industrial and consumer applications.

Best for

AC load switching
Microcontroller-to-AC isolation
EMI-sensitive environments

Avoid if

High-speed DC switching
Applications requiring non-zero-crossing control

Check before use

Load power factor
Commutating dV/dt requirements

Key specifications

Off-State Voltage: 800 V
RMS On-State Current: 300 mA
Trigger Current: 2 mA
Isolation Voltage: 5300 Vrms

Compliance & Environment

RoHS: ROHS3 Compliant
REACH: -
MSL: 1 (Unlimited)
ECCN: EAR99
HTSUS: 8541.49.8000

Application

Industrial ControlAC Motor DrivesPower Switching

Datasheet

96b2c0d397a7c73b353067ea81ca11f1_il410-241296.pdf

800 KB

Datasheet AI

CAD Models

Download ECAD models for IL4108: KiCad symbol & footprint, Altium footprint, PCB footprint, and 3D model.

EDA Symbol

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PCB Footprint

Land pattern for PCB layout

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3D Model

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KiCad Library

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Alternative components

Alternatives are being enriched. Analyze this part in PartGenie for the latest matches.

Design and risk insights

Questions & answers

The IL4108 is an optically coupled GaAs IRLED and photosensitive thyristor system with integrated zero-crossing detection, designed to isolate low-voltage logic from high-voltage AC lines.

AI summary

Best for

Avoid if

Check before use

Key specifications

Compliance & Environment

Application

Datasheet

CAD Models

Alternative components

Design and risk insights

Questions & answers

What is the IL4108?+×

What are the key applications for the IL4108?+×

What is the significance of the zero-crossing feature?+×

What should be considered when using the IL4108 with inductive loads?+×

What is the pinout of IL4108?+×