Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
Alternative Part
1. AS431BZTR-G1 Substitution Conclusion
Conditionally feasible as a drop-in replacement, suitable for general-purpose applications where initial accuracy is not critical. Compared to the original TL431BQLPME3, the AS431BZTR-G1 primarily differs in: lower initial accuracy (±1% vs. ±0.5%), a slightly different nominal reference voltage (2.5V vs. 2.495V), and a higher typical cathode operating current (1mA vs. 700µA). Direct substitution will result in a reduction in the absolute value and accuracy tolerance of the system's reference voltage, potentially affecting the performance of voltage-sensitive circuits. Additionally, the higher cathode current requirement may slightly increase overall circuit power dissipation. However, it provides a specified temperature coefficient (20ppm/°C), offering greater transparency regarding temperature stability. Substitution is viable if the actual circuit has relaxed initial accuracy requirements and can tolerate slightly higher power consumption.
2. AZ431AZ-ATRG1 Substitution Conclusion
A high-precision direct replacement with superior overall performance; this is the recommended substitution choice. Compared to the original TL431BQLPME3, the AZ431AZ-ATRG1 is highly compatible in core electrical parameters and offers improved key performance: it has higher initial accuracy (±0.4% vs. ±0.5%) and provides a specified typical temperature coefficient (20ppm/°C). Although there is a minor theoretical difference in its nominal reference voltage (2.5V vs. 2.495V) and its typical cathode operating current is also 1mA, these differences fall within acceptable limits for the vast majority of applications. The higher accuracy and defined temperature drift parameters enable this part to provide a more stable and precise voltage reference for the system. Direct substitution typically maintains or even enhances the original circuit's performance, making it an ideal upgrade replacement.
Analysis ID: FBF6-DB15000
Based on part parameters and for reference only. Not to be used for procurement or production.
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