EL817(S1)(TB)-G

Overview

The EL817(S1)(TB)-G is a single-channel transistor output optocoupler manufactured by Everlight Electronics Co Ltd. It features an NPN phototransistor output and provides an isolation voltage of 5000 Vrms. The component utilizes a compact 4-SMD surface-mount package configuration, designed for direct board mounting applications requiring galvanic isolation between input and output circuits.

Feature Summary

• Provides high-voltage electrical isolation via a 5000 Vrms dielectric barrier
• Integrates an NPN phototransistor for reliable DC signal transmission
• Utilizes a compact 4-SMD surface-mount form factor for space-constrained designs

Applications

• General-purpose signal isolation in industrial control systems
• Interface circuits for microcontroller-based digital logic levels
• Power supply feedback loop isolation mechanisms

Procurement Notes

Verify the specific suffix designation against the manufacturer's current product portfolio to confirm availability status. Soldering parameters must align with the official thermal profiling guidelines provided in the datasheet. Ensure compliance with RoHS directives if required by the target assembly specifications. Cross-reference the pinout diagram with the PCB footprint design prior to procurement finalization.

Selection Notes

Select this component when a surface-mount solution is preferred over through-hole variants within the EL817 family. The 5000 Vrms rating supports standard industrial isolation requirements. Confirm that the NPN output topology matches the downstream circuit sink capabilities. Evaluate the 4-SMD package dimensions against available board real estate constraints before integration into the schematic.

Part Context

This device belongs to the broader EL817 series of optocouplers produced by Everlight. While sharing core isolation characteristics with other family members, it specifically denotes a surface-mount variant. Differentiation from other models relies on the package type and specific suffix codes indicating tape-and-reel or cut-tape delivery formats.

Replacement Considerations

Direct substitutes include EL817(S1)(D)(TB)-G and EL817(S1)(C)(TB)-G, which share identical functional specifications and pinouts. Verify mechanical compatibility with existing footprints when swapping between these specific suffix variations.