Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
Alternative Part
1. LM431BCZXA Substitution Conclusion
This device can serve as a functional replacement, but it should be considered a performance‑downgraded substitute, suitable for applications where precision and power consumption are not critical. The key differences are as follows: First, its initial accuracy (±1%) is inferior to that of the original part (±0.5%), which will degrade overall system accuracy in precision reference or feedback applications. Second, its minimum cathode operating current (1 mA) is significantly higher than the original’s 700 µA, increasing the device’s own minimum operating power dissipation; this may cause startup or operational issues in low‑power designs or high‑impedance divider networks. Finally, the substitute specifies a typical temperature coefficient (50 ppm/°C), whereas the original part did not provide this parameter, indicating potential uncertainty in stability over the full temperature range.
2. AS431IAZTR‑G1 Substitution Conclusion
This device can be regarded as an electrically compatible replacement, though attention should be paid to a slight deviation in the reference voltage. The differences are: Its nominal reference voltage is 2.5 V, compared with 2.495 V for the original part, resulting in an inherent offset of approximately 0.2%. After direct substitution, all thresholds, output voltages, or feedback points set based on this voltage will shift proportionally; it is necessary to evaluate whether this deviation falls within the tolerance of the target circuit. On the other hand, its cathode operating current (50 µA) is much lower than the original’s 700 µA, which is a distinct advantage. It can operate stably at extremely low currents, making it particularly beneficial for battery‑powered and other low‑power applications. However, its dynamic response characteristics may differ from those of the original part.
Analysis ID: 3703-3CFE000
Based on part parameters and for reference only. Not to be used for procurement or production.
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