Alternative Part
1. TL431CLPRAG Substitution Conclusion
The TL431CLPRAG can generally serve as a replacement for the original KA431AZTA, but a key difference must be noted: its initial accuracy is ±2.2%, which is lower than the ±1% of the original part. In circuits demanding high‑precision reference voltages—such as precision power supplies or measurement equipment—direct substitution may increase output voltage error and degrade overall system accuracy. For applications with relaxed reference voltage tolerance, such as general voltage regulation or protection functions, it can be used directly without modification. Both devices share the same TO‑92‑3 package and pin‑out, as well as identical temperature coefficient (50 ppm/°C) and output voltage range (2.495 V–36 V). Therefore, in non‑precision‑sensitive applications, they can be considered equivalent substitutes.
2. TL431ILPRPG Substitution Conclusion
The TL431ILPRPG has identical specifications to the TL431CLPRAG, including the same initial accuracy of ±2.2%, which is also lower than the original part’s ±1%. The feasibility of substitution follows the same conclusion as above: it can directly replace the original in circuits where accuracy is not critical. However, if the original design relies on the 1% accuracy to ensure performance—for example, in feedback‑loop references—system output should be verified after replacement to confirm it still meets requirements. Both devices match the original in package, temperature coefficient, and electrical parameters; the only notable difference is the reference accuracy. Thus, when considering substitution, the circuit’s dependence on reference voltage precision should be evaluated first.
Analysis ID: C7EB-8D38000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com