Original Part
Alternative Part
1. 140817142000 Substitution Conclusion
The 140817142000 can serve as a full and direct replacement for the original part EL817(S1)(TB)-V. Both devices share identical core performance parameters, including isolation voltage (5000Vrms), CTR range (50%-600% @5mA), output current/voltage capability (50mA, 35V), and saturation voltage (200mV). The only minor discrepancies lie in the typical forward voltage (Vf), which is 1.24V versus 1.2V, and the order in which the typical rise/fall times are listed (3µs/4µs vs. 4µs/3µs). These variations are negligible and well within the typical value tolerances specified in the datasheets, posing no practical impact on driver circuit design, switching speed, or overall system performance. This part is a functionally equivalent, industry-standard-compliant drop-in replacement.
2. 140817143000 Substitution Conclusion
The 140817143000 is also a fully qualified direct replacement for the original EL817(S1)(TB)-V. Its key electrical specifications—isolation voltage, CTR, current/voltage ratings, and Vce(sat)—are identical to both the original part and the aforementioned 140817142000. Differences are similarly confined to the typical forward voltage (1.24V vs. 1.2V) and the notation order for rise/fall times. These distinctions reflect minor measurement or documentation variations between manufacturers and do not constitute a performance deviation. No adjustments are required in practical application circuits (e.g., driving conditions, signal delay) to achieve equivalent functionality. This model is a compatible substitute with matching package and electrical performance.
Analysis ID: ABB4-4690000
Based on part parameters and for reference only. Not to be used for procurement or production.
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