EL817(C)-V

Overview

The EL817(C)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. 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. Key electrical parameters include a collector-emitter breakdown voltage of 35 V minimum, a maximum forward current of 60 mA, and a nominal forward voltage of 1.4 V. The current transfer ratio ranges from 200% to 400% at a forward current of 5 mA and collector-emitter voltage of 5 V.

Feature Summary

• High isolation voltage capability between input and output terminals
• Compact small outline package design for space-constrained applications
• Compliant with lead-free and RoHS environmental standards
• Recognized by UL, VDE, SEMKO, NEMKO, DEMKO, FIMKO, CSA, and CQC safety agencies

Applications

• Industrial control systems requiring signal isolation
• Communication equipment interface circuits
• Microprocessor input/output isolation
• Power supply feedback loops

Procurement Notes

Verify the specific suffix configuration against the manufacturer's datasheet to ensure compatibility with required packaging and certification standards. Confirm that the component meets all relevant regional safety approvals necessary for the target end-product. Cross-reference the ordering code with official distributor catalogs to validate availability and authenticity before finalizing procurement plans.

Selection Notes

Select this component when high isolation voltage and compact surface-mount or through-hole form factors are required. Ensure the application current requirements fall within the specified forward current limits. Verify that the operating temperature range aligns with the system's thermal environment. Consider the current transfer ratio variations when designing biasing networks for reliable switching performance.

Part Context

This part belongs to the EL817 series of optocouplers, which are widely used for general-purpose isolation tasks. The series offers various package options including DIP and SMD configurations. The EL817(C)-V specifically denotes a version compliant with RoHS directives and featuring specific safety certifications. It serves as a standard solution for galvanic isolation in electronic circuits where signal transmission across potential differences is necessary.

Replacement Considerations

Direct replacements may include other EL817 variants with compatible pinouts and electrical characteristics. Verify that substitute components meet the same isolation voltage and safety approval requirements. Check for equivalent current transfer ratios and package dimensions to ensure mechanical fit.