Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±1% 100 mA SOT-23-3
1. AS431IANTR-G1 Substitution Conclusion
The AS431IANTR-G1 can be substituted, provided that core functionality and package compatibility are maintained, though the application circuit’s suitability must be verified. Its ±0.5% initial accuracy is a clear advantage over the original part’s ±1% tolerance. The key difference lies in the cathode operating current (Ikat), which is reduced from 1 mA to 50 µA. This results in lower circuit quiescent power dissipation, but it also requires the supply or bias circuit to reliably start up and operate the device at such low current levels. If the original circuit does not meet this minimum current requirement, reference voltage instability may occur. Additionally, the unspecified temperature coefficient (Temp Coef) represents a significant technical risk. In wide-temperature-range applications, system accuracy may degrade compared to the original part, which typically specifies 50 ppm/°C.
2. AS431IBNTR-G1 Substitution Conclusion
The AS431IBNTR-G1 is a direct functional and accuracy-grade replacement, but circuit compatibility must still be evaluated. It shares the same ±1% initial accuracy as the original part, with identical package and key voltage/current ratings. The main difference is again the reduced cathode operating current (Ikat) from 1 mA down to 50 µA. While this offers the benefit of lower power consumption, it necessitates a re-evaluation of the original design’s minimum bias current capability; otherwise, there is a risk of unreliable turn-on. As with the “AN” version, the absence of a specified temperature coefficient introduces uncertainty in long-term accuracy for applications requiring high temperature stability, potentially contributing to system error.
Analysis ID: EF18-E161000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com