Original Part
Alternative Part
1. AZ431BZ-ATRE1 Substitution Conclusion
The AZ431BZ-ATRE1 can serve as a viable substitute for the TL431BCLPRMG, but key parameter differences must be noted: its output voltage tolerance is ±0.8% (compared to ±0.4% for the original), resulting in reduced initial accuracy that may affect high-precision reference applications. However, its typical temperature coefficient is improved to 20 ppm/°C (versus 50 ppm/°C for the original), offering better stability over a wide temperature range. Substitution is acceptable in applications where initial accuracy is not critical—such as general voltage regulation circuits—and where temperature stability is prioritized. For designs requiring strict ±0.4% tolerance, such as precision measurement systems, further evaluation or device screening is recommended.
2. AS431BZTR-E1 Substitution Conclusion
The AS431BZTR-E1 is functionally compatible with the TL431BCLPRMG, but its tolerance is further relaxed to ±1%, significantly lower than the original’s ±0.4%. This may increase output voltage deviation and is unsuitable for designs sensitive to reference voltage accuracy. Its temperature coefficient is also 20 ppm/°C, providing better low-to-mid temperature drift performance than the original. This substitute is only recommended for circuits with relaxed accuracy requirements, such as LED drivers or non-critical feedback loops, provided sufficient error margin is designed in. Avoid substitution if the system cannot accommodate the increased tolerance.
Analysis ID: EA94-3266000
Based on part parameters and for reference only. Not to be used for procurement or production.
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