Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.8% 100 mA SOT-23-3
1. AZ431BN-ATRE1 Substitution Conclusion
Functionally compatible as a substitute, but key parameter degradation must be noted. It is not recommended for applications with stringent requirements for initial accuracy and power consumption. Compared to the original part (NCP431BCSNT1G), the AZ431BN differs primarily in initial accuracy (±0.8% vs. ±0.5%) and minimum cathode operating current (1mA vs. 40µA). Firstly, its wider initial output voltage tolerance may degrade overall system accuracy. Secondly, its significantly higher minimum required operating current not only increases system quiescent power dissipation but may also prevent the reference from starting up or operating stably in applications requiring extremely low standby current or those powered through high-value bias resistors.
2. ATL432BIDBZR Substitution Conclusion
Core parameters are highly aligned, making this the preferred choice for a direct replacement. The ATL432BIDBZR's key electrical parameters are nearly identical to those of the original part (NCP431BCSNT1G): initial accuracy is ±0.5% for both, temperature coefficients are similar (48ppm/°C vs. 50ppm/°C), and both support cathode currents up to 100mA. The most critical parameter for compatibility—the minimum cathode operating current—is 80µA. This is on the same order of magnitude and only marginally higher than the original's 40µA. In the vast majority of application circuits, stable operation can be ensured without modifying the bias resistor design, enabling a true "drop-in" replacement.
Analysis ID: A54F-5A50000
Based on part parameters and for reference only. Not to be used for procurement or production.
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