EL817(S)(C)(TD)-V

Overview

The EL817(S)(C)(TD)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with an NPN phototransistor detector in a compact surface-mount package. The device provides high isolation voltage of 5000 Vrms between input and output terminals, ensuring reliable signal transmission in electrically noisy environments. Key electrical parameters include a minimum current transfer ratio of 200% at IF=5mA and VCE=5V, a maximum collector-emitter breakdown voltage of 35V, and a maximum forward current of 60mA. It operates within a temperature range of -55°C to +110°C.

Feature Summary

• High isolation voltage capability of 5000 Vrms between input and output circuits
• Compact small outline surface-mount package design for space-constrained applications
• Wide operating temperature range extending up to +110°C for robust performance
• Compliant with lead-free and RoHS standards for environmental safety

Applications

• Signal isolation in industrial control systems
• Switching power supply feedback loops
• Microcontroller interface circuits requiring galvanic isolation

Procurement Notes

Verify the specific suffix (TD) corresponds to the required tape-and-reel packaging configuration. Confirm that the component status is active or obsolete depending on long-term availability requirements. Ensure the manufacturer is Everlight Electronics Co Ltd. Check for UL and VDE approval numbers if regulatory compliance is mandatory for the end application.

Selection Notes

Select this component when a surface-mount solution is required for general-purpose isolation. Compare the 200% minimum CTR against circuit drive requirements. Verify that the 4-SOP package dimensions fit the PCB layout constraints. Consider the 5000 Vrms isolation rating relative to the system's working voltage and transient overvoltage conditions.

Part Context

This part belongs to the EL817 series, a widely recognized family of transistor output optocouplers. The series typically includes through-hole DIP variants and various surface-mount configurations. The EL817(S)(C)(TD)-V specifically denotes the surface-mount version with defined reel packaging, maintaining the core electrical characteristics of the standard EL817 while adapting to automated assembly processes.

Replacement Considerations

Direct substitutes may include other EL817 surface-mount variants from Everlight, such as EL817(S)(C)(TU)-V, provided the package footprint and electrical ratings match. Cross-brand replacements require verification of pinout compatibility, CTR ranges, and isolation voltage specifications.