Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA TO-92-3
1. TL431AILPME3 Substitution Conclusion
The TL431AILPME3 can serve as a direct, drop-in replacement for the original part (Onsemi's TL431AILPRAG). Both devices are "A" grade TL431s with ±1% reference voltage tolerance. Their core electrical parameters—output voltage range, output current capability, and reference voltage—are identical, as is their TO-92-3 package. The primary differences lie in the manufacturer (TI vs. Onsemi) and the nominal cathode current specification (TI specifies 700µA, while Onsemi specifies 1mA). This parameter defines the minimum current required for the device to begin regulating properly. TI's lower value may offer a marginally wider dynamic operating range or a slight advantage in extremely low-power designs. However, 1mA is the typical design target, and this discrepancy is generally not a limiting factor in practical circuits. Therefore, these parts are considered fully interchangeable.
2. TL431BILPRE3 Substitution Conclusion
The TL431BILPRE3 represents a performance upgrade alternative to the original part. The key distinction is its tighter voltage tolerance of ±0.5%, compared to the ±1% of the original device. The "B" grade component provides a more precise and stable voltage reference, which can enhance overall system accuracy and consistency. All other critical parameters, such as output voltage range and package, remain compatible. The cathode current difference (700µA vs. 1mA) is consistent with the note above. The TL431BILPRE3 is not only a physically and functionally compatible substitute but also offers superior precision, making it a high-quality replacement option.
Analysis ID: 7D7A-D29C000
Based on part parameters and for reference only. Not to be used for procurement or production.
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