EL817(S)(B)(TB)-V

Overview

The EL817(S)(B)(TB)-V is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an infrared emitting diode optically coupled to an NPN phototransistor detector. The device provides high isolation voltage of 5000 Vrms between input and output. It is designed for surface mount installation in a compact package. The component operates within a temperature range of -55°C to +110°C. It complies with RoHS standards and holds multiple international safety approvals including UL, VDE, SEMKO, NEMKO, DEMKO, FIMKO, CSA, and CQC.

Feature Summary

• High isolation voltage capability between input and output circuits
• Compact small outline surface mount package design
• Compliant with lead-free and RoHS environmental standards
• Recognized by major international safety certification bodies

Applications

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

Procurement Notes

Verify the specific suffix configuration against the manufacturer datasheet to ensure compatibility with required current transfer ratio grades and packaging formats. Confirm that the surface mount variant matches the intended PCB footprint and reflow soldering profile requirements. Check for any regional distribution restrictions or end-of-life notices associated with this specific part number before finalizing procurement plans.

Selection Notes

Select this component when a surface mount solution is required for signal isolation applications. Ensure the circuit design accommodates the specified collector-emitter breakdown voltage and forward current limits. Consider the operating temperature range to verify suitability for the intended environmental conditions. Verify that the single-channel configuration meets the system's isolation channel count requirements.

Part Context

This component belongs to the EL817 series of photocouplers from Everlight Electronics. The series includes various package options such as DIP and SMD types with different lead configurations. The EL817 family is widely used for general-purpose isolation tasks. This specific model represents the surface mount variant with tape and reel packaging options.

Replacement Considerations

Equivalent parts include other EL817 series variants from Everlight or compatible transistor output optocouplers from other manufacturers. Verify pinout compatibility and electrical parameter margins before substitution. Cross-reference specific suffix codes to ensure matching package type and certification status.