EL817S(D)(TA)(CIS)-G

Overview

The EL817S(D)(TA)(CIS)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics. It features an NPN phototransistor output and provides electrical isolation with a rated insulation voltage of 5000 Vrms. The device is housed in a compact 4-SMD surface-mount package, designed for efficient integration into space-constrained circuit boards. This component serves as a signal transfer interface between isolated circuits, ensuring reliable operation under high-voltage differential conditions while maintaining low power consumption characteristics typical of modern solid-state isolation devices.

Feature Summary

• Provides galvanic isolation between input and output circuits using infrared LED and phototransistor technology
• Features a compact 4-SMD surface-mount package for automated assembly and space efficiency
• Delivers high insulation voltage capability to protect sensitive control electronics from high-voltage transients

Applications

• Signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic gates
• Power supply feedback loops for voltage regulation

Procurement Notes

Verify the specific suffix (CIS) against the manufacturer's current datasheet to confirm pinout orientation and compliance markings. Ensure the ordering part number matches the required tape-and-reel or cut-tape packaging format. Cross-reference the RoHS status and lead time requirements with authorized distributors prior to finalizing procurement plans.

Selection Notes

Select this component when a small form factor is required alongside standard transistor output characteristics. Verify that the input forward current and output collector-emitter voltage ratings meet the specific circuit design constraints. Consider the thermal management capabilities of the SMD package relative to the expected duty cycle and ambient operating temperature range.

Part Context

This part belongs to the EL817 family of photocouplers, which are widely used for general-purpose isolation. The 'S' designation indicates a surface-mount variant, distinguishing it from through-hole DIP packages. The inclusion of specific suffixes typically denotes variations in lead finish, packaging type, or regional compliance certifications provided by Everlight.

Replacement Considerations

Direct replacements include other EL817 series variants such as EL817(S)(D)(TA)-G or EL817S(C)(TU)(CY)-F, provided the pinout and package dimensions are compatible. Verify that substitute components maintain equivalent isolation voltage and current transfer ratio specifications.