EL354(TB)

Overview

The EL354(TB) is a single-channel optocoupler manufactured by Everlight Electronics Co Ltd. It integrates an infrared LED input with a phototransistor output in a 4-pin SOP package. The device supports both AC and DC input signals and provides 3750Vrms isolation voltage. Key electrical parameters include a maximum collector-emitter voltage of 80V, a typical forward voltage of 1.2V, and a maximum DC forward current of 50mA. The Current Transfer Ratio ranges from 50% to 150% at 1mA input.

Feature Summary

• Provides electrical isolation between input and output circuits using infrared light transmission.
• Supports both alternating current (AC) and direct current (DC) input signal types for versatile interface applications.
• Features a compact four-pin surface-mount package design suitable for automated assembly processes.

Applications

• Digital logic signal transmission and level shifting
• Power supply control and switching circuits
• Electrical insulation isolation between different circuit systems

Procurement Notes

Verify the specific suffix designation against official manufacturer documentation to confirm exact specifications and compliance status. Ensure that the procurement source provides valid traceability data for the component batch. Cross-reference the part number with the latest datasheet to confirm availability and any potential lifecycle changes before finalizing orders.

Selection Notes

Select this component when high isolation voltage requirements are necessary for safety-critical applications. Consider the AC/DC input capability if interfacing with varying signal sources. Evaluate the package size constraints against available board space. Verify that the output transistor voltage rating meets the load requirements of the destination circuit.

Part Context

This component belongs to the family of transistor output optocouplers designed for general-purpose isolation tasks. It utilizes standard semiconductor fabrication techniques to combine optoelectronic components within a single encapsulated unit. The product line focuses on providing reliable signal transfer while maintaining galvanic separation between distinct electrical domains.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference material. Consult official manufacturer cross-reference guides or authorized distributor databases for verified equivalent components that match the required electrical and mechanical specifications.