Original Part
Alternative Part
1. TL431BILPRAG Substitution Conclusion
The TL431BILPRAG can directly replace the original part TL431BVLPG, as both are from the same series manufactured by ON Semiconductor and share identical key electrical parameters: reference voltage of 2.495V, tolerance of ±0.4%, temperature coefficient of 50 ppm/°C, and output current capability of 100 mA. The only notable difference lies in the package details: the original device uses a TO-92-3 long-body (TO-226) package, whereas the TL431BILPRAG is supplied in a TO-226AA package with formed leads. This may introduce slight variations in physical outline and pin spacing during installation, requiring verification of mechanical compatibility with the PCB layout. However, there is no impact on electrical performance or functionality, making it a drop-in replacement.
2. TL1431CLPE3 Substitution Conclusion
The TL1431CLPE3 can serve as a functional substitute, but attention must be paid to key parameter differences. Its nominal reference voltage is specified as 2.5V (compared to 2.495V for the original part). Although actual values may overlap within the ±0.4% tolerance, the different nominal value could introduce minor deviations in precision threshold calculations during system design. Additionally, Texas Instruments does not explicitly specify the temperature coefficient for this device, whereas the original part provides a typical value of 50 ppm/°C. In applications with significant ambient temperature variation, this may introduce additional accuracy risks. The package is similar to the TL431BILPRAG (TO-226AA), but electrical parameters should be revalidated in high-precision or temperature-sensitive applications. For general use, it remains a viable substitute.
Analysis ID: 5282-6CD2000
Based on part parameters and for reference only. Not to be used for procurement or production.
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