Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA TO-92-3
1. TL431AIZ-AP Substitution Conclusion
The TL431AIZ-AP can serve as a direct replacement for the TL431ACLPR, as both devices are fully compatible in key parameters such as accuracy (both ±1%), output voltage range (2.495V to 36V), and package (both TO-92-3, three-lead), ensuring electrical and mechanical interchangeability. The only notable difference lies in the cathode current: the TL431AIZ-AP requires 700 µA, whereas the original part is rated for 600 µA. After substitution, the circuit must supply a slightly higher minimum operating current. This may have a minor impact on ultra-low-power designs—such as increasing system standby power consumption or limiting stability under extremely low current conditions. For most conventional applications, however, this difference typically remains within acceptable limits and does not affect basic functionality.
2. TL431IZ-AP Substitution Conclusion
The feasibility of substituting the TL431IZ-AP for the TL431ACLPR is relatively low, primarily due to significant differences in accuracy, cathode current, and package. First, the accuracy of ±2.21% compared to the original ±1% results in a wider output tolerance for the reference voltage, which may degrade system accuracy. This makes it unsuitable for applications demanding high voltage stability, such as precision measurement or reference source circuits. Second, the cathode current of 1 mA versus 600 µA indicates the device requires a higher minimum operating current, increasing overall power consumption and potentially affecting efficiency in battery-powered or low-power designs. Finally, the package is TO-92-2 (two-lead) compared to the original TO-92-3 (three-lead). If the parameters are accurate, the pinout is incompatible, preventing direct physical installation and likely necessitating PCB layout redesign. Collectively, these differences limit its suitability as a direct substitute.
Analysis ID: 0CD3-B5A8000
Based on part parameters and for reference only. Not to be used for procurement or production.
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