Original Part
Alternative Part
1. 140817142000 Substitution Conclusion
Full substitution is acceptable. The key technical parameters of the two part numbers are completely identical, including isolation voltage (5000Vrms), current transfer ratio range (50%-600% @5mA), maximum output voltage (35V), maximum output current (50mA), and saturation voltage drop (200mV). The only minor difference lies in the typical forward voltage (Vf): the Würth part is rated at 1.24V, slightly higher than the original part's 1.2V. However, this 0.04V deviation falls within the normal tolerance range for the vast majority of application circuits and will not affect the drive design or functionality on the LED side. Additionally, both parts are supplied in a 4-SMD package, allowing for direct pin-to-pin replacement.
2. 140817143000 Substitution Conclusion
Electrically substitutable, but package compatibility must be verified. This part number shares identical electrical parameters with 140817142000; therefore, its electrical performance comparison and substitution feasibility relative to the original part are the same. Its package is described as "4-DIP-SL," which differs from the "4-SMD" description of the original part and 140817142000. "DIP-SL" typically refers to a slim dual in-line package, while "SMD" denotes a surface-mount package. This indicates potential differences in physical package characteristics (pin form factor, mounting height). Adjustments to PCB layout (particularly pad design) and assembly process (reflow soldering vs. wave or hand soldering) may be required. Prior to substitution, the detailed mechanical drawings of both parts must be reviewed to ensure physical mounting compatibility.
Analysis ID: 08B2-BDD1000
Based on part parameters and for reference only. Not to be used for procurement or production.
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