Original Part
Alternative Part
1. 140817142000 Substitution Conclusion
From a core electrical parameter perspective, the 140817142000 is a fully viable substitute for the EL817(S)(TA)-V. All key specifications, including isolation voltage, CTR range, output current and voltage, and saturation voltage drop, are identical, ensuring functional and performance equivalence in the circuit. The only discrepancy lies in a slightly different forward voltage (Vf) (Würth: 1.24V Typ vs. Everlight: 1.2V Typ). This minor variance typically falls within design margins. Under identical input current conditions, the Würth component may exhibit marginally higher power dissipation on the input side, but this has negligible impact on its logic switching functionality. The package is also identical (4-SMD Gull Wing), allowing for a direct physical replacement.
2. 140817143000 Substitution Conclusion
The 140817143000 also presents direct electrical feasibility for substituting the EL817(S)(TA)-V. All its key electrical parameters align with both the original part and the 140817142000. Similar to the 140817142000, its distinction from the original part is the same subtle Vf difference (1.24V Typ vs. 1.2V Typ), which has a negligible effect on circuit performance. A critical potential difference requiring attention is its package designation "4-DIP-SL." This may indicate mechanical differences in package outline, height, or pin pitch compared to the original "4-SMD" package. Prior to substitution, it is imperative to rigorously cross-check the PCB footprint drawings of both components to ensure complete physical dimensional and pad layout compatibility; failure to do so could result in installation issues.
Analysis ID: 3494-F1F0000
Based on part parameters and for reference only. Not to be used for procurement or production.
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