EL817(S)(D)(TD)

Overview

The EL817(S)(D)(TD) is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with a phototransistor detector, providing electrical isolation between input and output circuits. The device features a surface-mount package configuration and supports a maximum collector-emitter voltage of 35 V. It operates within a temperature range of -55 °C to +110 °C and offers high isolation voltage capabilities.

Feature Summary

• Integrates an infrared LED optically coupled to a phototransistor for signal transmission
• Provides high electrical isolation between input and output channels
• Designed for compact surface-mount applications

Applications

• Signal isolation in digital communication interfaces
• Switching power supply feedback loops
• Microcontroller input/output isolation

Procurement Notes

Verify the specific suffix codes against the manufacturer's official datasheet to confirm pinout orientation and lead finish specifications. Ensure the selected variant matches the required isolation voltage ratings and compliance standards for the target application environment.

Selection Notes

Select this component when a low-profile surface-mount solution is required for basic optoisolation. Consider the current transfer ratio requirements and operating temperature range to ensure compatibility with the system's thermal management and signal integrity needs.

Part Context

This part belongs to the EL817 series, which includes various DIP and SMD configurations. The series is widely used for general-purpose isolation tasks. The specific model denotes a surface-mount variant with defined terminal arrangements suitable for automated assembly processes.

Replacement Considerations

Check for direct equivalents from other manufacturers offering identical pinouts and electrical characteristics. Verify that any substitute maintains the same isolation voltage rating and package dimensions to fit existing board layouts.