Original Part
Alternative Part
1. KA431AZBU Substitution Conclusion
The KA431AZBU can directly replace the TL431ACLPG. Both are from ON Semiconductor and share identical key electrical parameters: a 2.495V reference voltage, ±1% initial accuracy, a typical temperature coefficient of 50ppm/°C, a 100mA output current, and a 1mA cathode operating current. They also share the same TO-92-3 package. The only technical distinction lies in the part numbering scheme. The KA431AZBU is not a compatible part but is most likely a direct equivalent or regional variant of the original part within the product line. It is a seamless drop-in replacement in terms of electrical performance, thermal characteristics, and physical dimensions.
2. TL1431CLPE3 Substitution Conclusion
The TL1431CLPE3 is a functional substitute for the TL431ACLPG, but key parameter differences require attention. Its primary advantage is higher initial accuracy (±0.4% vs. ±1%), with the reference voltage nominally adjusted to 2.5V. A critical drawback is its unspecified temperature coefficient. The stability of its output voltage over temperature is not quantifiably guaranteed and may be better, equal to, or worse than the Original Part's typical 50ppm/°C. This discrepancy introduces performance risk in applications with stringent temperature stability requirements (e.g., wide-temperature-range instrumentation), necessitating circuit validation before direct substitution. However, in applications where initial accuracy is prioritized over temperature stability, it can be considered an upgraded alternative. The package and pinout are compatible.
Analysis ID: D159-0FDA000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com