Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
1. LM431SCCM32X Substitution Conclusion
The LM431SCCM32X can directly replace the original LM431SBCM32X, as it is an upgraded version from the same manufacturer, onsemi. The improvement lies in its tighter tolerance, enhanced from ±1% to ±0.5%, which provides higher stability and lower error in voltage reference accuracy, thereby benefiting overall circuit performance. Other key parameters—including temperature coefficient (50 ppm/°C), output voltage range (2.495 V to 36 V), current capability (100 mA), and package (SOT-23-3)—remain identical. This ensures electrical compatibility and enables a plug-and-play substitution without circuit modifications.
2. AS431ANTR-E1 Substitution Conclusion
The AS431ANTR-E1 can technically substitute for the original LM431SBCM32X, but the application context should be carefully evaluated. Key differences include: tolerance improved from ±1% to ±0.5%, and temperature coefficient reduced from 50 ppm/°C to a typical 20 ppm/°C. This not only increases voltage accuracy but also significantly enhances temperature stability, making it suitable for environments with wide temperature variations. However, the minimum reference voltage shifts from 2.495 V to 2.5 V, which may introduce deviation in extremely high-precision applications; circuit calibration or verification is recommended to ensure compatibility. Additionally, although the package is the same (SOT-23-3), the different manufacturer may result in variations in secondary characteristics such as noise or long-term drift. Testing prior to actual replacement is advised to confirm full compatibility.
Analysis ID: 2371-627A000
Based on part parameters and for reference only. Not to be used for procurement or production.
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