Alternative Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA TO-92-3
1. TL431IZ-AP Substitution Conclusion
From the perspective of core functionality and package, the TL431IZ-AP is pin-compatible and can perform the voltage reference function of the KA431LZTA. However, significant differences in key parameters make it a low-feasibility substitute. The discrepancies lie in initial accuracy (±2.21% vs. ±0.5%) and an unspecified temperature coefficient. The initial output voltage tolerance of the TL431IZ-AP is over four times wider than that of the original part, and its output voltage drift characteristics under temperature variation are uncertain. This device is only suitable for non-critical circuits where voltage accuracy and temperature stability are not stringent requirements. Direct substitution in precision reference or feedback loops may lead to degraded system performance.
2. TL431AILPRPG Substitution Conclusion
The TL431AILPRPG is a high-feasibility substitute for the original KA431LZTA. The two parts are highly consistent in manufacturer, core electrical parameters, and package. The only difference is initial accuracy (±1% vs. ±0.5%), giving the substitute twice the initial voltage error range. Nevertheless, its typical 50ppm/°C temperature coefficient ensures comparable temperature stability. For most applications not requiring the highest precision—such as general switching power supply feedback or voltage monitoring—this accuracy difference typically falls within the system's tolerance margin. Therefore, the TL431AILPRPG can be considered a reliable and cost-effective direct replacement for the KA431LZTA.
Analysis ID: FF0D-4B5F000
Based on part parameters and for reference only. Not to be used for procurement or production.
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