Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA TO-92-3
1. TL431IZ-AP Substitution Conclusion
The TL431IZ-AP can functionally replace the original TL431BVLPRAG, but with notable technical differences. Primarily, its tolerance degrades from ±0.4% to ±2.21%, and its temperature coefficient is unspecified, whereas the original specifies a typical 50 ppm/°C. The TL431IZ-AP exhibits lower output voltage accuracy and poorer temperature stability. In applications requiring a high‑precision voltage reference or stable operation over a wide temperature range—such as precision power supplies or measurement circuits—this substitute may introduce significant error or performance drift. However, if the application has relaxed accuracy requirements (e.g., general voltage regulation or protection circuits) and the package is compatible (both are TO‑92 three‑pin, though pin‑out alignment must be verified), substitution is possible provided the overall circuit performance is re‑evaluated against system requirements.
2. TL431BILPRAG Substitution Conclusion
The TL431BILPRAG is a highly viable substitute for the original TL431BVLPRAG, as their key parameters are identical: both have ±0.4% tolerance, a typical temperature coefficient of 50 ppm/°C, and the same output voltage range and current capability. The main difference lies in package details: the original uses a TO‑92‑3 Long Body, while the TL431BILPRAG comes in a TO‑92‑3 Formed Leads version. This may require minor attention to lead length or PCB layout during physical installation. However, since the package type and pin‑out are the same and the electrical characteristics match fully, the TL431BILPRAG can be used as a direct drop‑in replacement without circuit modifications, making it suitable for high‑precision voltage‑reference applications.
Analysis ID: 4ECE-662F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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