Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
Alternative Part
1. AZ431BZ-ATRE1 Substitution Conclusion
The AZ431BZ-ATRE1 requires careful evaluation as a direct replacement and carries certain risks. While it is compatible with the original part in terms of core functionality (adjustable shunt voltage reference) and package, its most critical deviations are a lower initial accuracy (±0.8% vs. ±0.5%) and a higher cathode operating current (1 mA vs. 700 µA). If the application circuit has stringent requirements for the absolute accuracy of the reference voltage—such as in a high-precision ADC reference—it may fail to meet the original design specifications. More critically, the higher cathode current requirement could lead to insufficient bias current in the original design, potentially preventing the AZ431BZ from properly turning on or operating stably within the circuit, resulting in system failure. It may be considered as an alternative only in circuits where accuracy is not critical and sufficient bias current is available.
2. AS431BZTR-E1 Substitution Conclusion
The AS431BZTR-E1 is not suitable as a direct replacement for demanding applications and should only be considered for use in relaxed scenarios. Its differences from the original part include a lower initial accuracy (±1% vs. ±0.5%) and a higher cathode operating current (1 mA vs. 700 µA). The larger initial error range of its output voltage makes it unsuitable for designs sensitive to voltage accuracy. Similar to the AZ431BZ, the higher cathode current requirement is a potential "killer" discrepancy that may directly prevent the device from starting up in the original circuit. It can only be considered for applications with very relaxed requirements for both reference voltage accuracy and power consumption, and the bias circuitry must be revalidated.
Analysis ID: 04CB-4BED000
Based on part parameters and for reference only. Not to be used for procurement or production.
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