Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2% 100 mA TO-236AB
Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA SOT-23-3
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA SOT-23-3
1. TL431CL3T Substitution Conclusion
The TL431CL3T can generally serve as a drop‑in replacement for the original part, though potential impacts due to accuracy differences should be considered. Both are adjustable shunt references with identical core parameters: output voltage range (2.495V–36V), output current (100mA), cathode current (1mA), and package (SOT‑23‑3). However, the initial accuracy of the TL431CL3T is ±2.21%, slightly wider than the original’s ±2%. In higher‑precision voltage‑reference applications, the TL431CL3T may introduce a somewhat larger output voltage deviation; the circuit’s error budget should be reviewed to determine whether this is acceptable. For general regulation or protection circuits, the difference is usually tolerable. It is recommended to verify voltage margins at critical nodes after substitution.
2. TL431IL3T Substitution Conclusion
The TL431IL3T shares nearly identical electrical and package characteristics with the TL431CL3T, leading to the same substitution conclusion: it is electrically and mechanically compatible, but its initial accuracy is ±2.21%, slightly wider than the original’s ±2%. This difference may cause a minor reduction in output voltage precision. For unspecified parameters such as temperature stability and noise, consult the ST datasheet to confirm whether they meet application requirements. In most general‑purpose scenarios, direct replacement is feasible; however, for precision reference or high‑stability designs, it is advisable to perform actual measurements to verify long‑term performance and temperature drift.
Analysis ID: B194-6229000
Based on part parameters and for reference only. Not to be used for procurement or production.
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