EL817(S)(D)(TU)-G

Overview

The EL817(S)(D)(TU)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with an NPN phototransistor detector, providing electrical isolation between input and output circuits. The device features a maximum insulation voltage of 5000 Vrms and operates within a temperature range of -55°C to +110°C. It is available in a surface-mount package configuration.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits
• Integrates an infrared LED with an NPN phototransistor for signal transmission
• Supports operation at elevated temperatures up to 110°C

Applications

• Industrial control systems requiring galvanic isolation
• Signal isolation in microprocessor-based circuits
• Power supply feedback loops

Procurement Notes

Verify the specific suffix (S)(D)(TU)-G against official Everlight documentation to confirm pinout, CTR binning, and packaging type. Ensure compatibility with surface-mount assembly processes. Confirm RoHS compliance status through the manufacturer's current environmental declarations before procurement.

Selection Notes

Select this component when surface-mount isolation is required for low-speed digital signals. Compare current transfer ratio specifications against circuit requirements. Verify that the 5000 Vrms isolation rating meets safety standards for the target application environment.

Part Context

This part belongs to the EL817 series of optocouplers from Everlight. The series typically includes DIP and SMD variants with varying isolation voltages and current transfer ratios. The EL817 family is widely used for general-purpose isolation tasks in consumer and industrial electronics.

Replacement Considerations

Check for direct substitutes such as EL817(S)(C)(TU)-G or EL817(S)(B)(TU)-G if different CTR bins are needed. Verify pinout compatibility with existing PCB layouts before substituting.