Original Part
Alternative Part
1. TL431BCLPRAG Substitution Conclusion
The TL431BCLPRAG can directly replace the original part FAN431AZXA, though potential impacts due to improved accuracy should be considered. Both are adjustable shunt voltage references from the same ON Semiconductor series, with fully compatible key parameters: output voltage range (2.495V–36V), output current (100mA), temperature coefficient (50ppm/°C), and TO-92-3 package. The main difference lies in the initial accuracy: the TL431BCLPRAG offers ±0.4%, compared to ±1% for the original part. Substitution results in smaller absolute reference voltage error, which can improve overall system precision. However, in circuits without strict reference voltage tolerance requirements—such as power supplies with wide feedback margin—this difference typically does not affect functionality. If the original circuit relies on the ±1% error for specific compensation design, system stability should be re-evaluated.
2. TL431BCLPRMG Substitution Conclusion
The TL431BCLPRMG shares identical electrical parameters and package with the TL431BCLPRAG, differing only in the suffix code (likely indicating production lot or packaging variation). Therefore, its substitution conclusion is the same as for the TL431BCLPRAG: it can directly replace the original FAN431AZXA. Both substitutes provide ±0.4% accuracy, an improvement over the original part, while other core characteristics—operating voltage, current capability, temperature coefficient, and pinout—remain unchanged. In practice, both replacement options can be considered higher-accuracy drop-in substitutes. However, engineers should verify the circuit’s sensitivity to reference voltage accuracy, as the reduced error may uncover existing matching issues in the original design, such as resistor divider ratio tolerance.
Analysis ID: BFA7-57EC000
Based on part parameters and for reference only. Not to be used for procurement or production.
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