Alternative Part
1. TL431AILPG Substitution Conclusion
Full substitution is acceptable. The TL431AILPG is identical to the LM431ACZX in core functionality, package type (TO-92-3), and key parameters such as output voltage range, cathode current, and temperature coefficient. The differences lie in its improved output voltage accuracy of ±1% (compared to ±2% for the original part) and a nominal reference voltage of 2.495V (versus 2.5V for the original). Substituting with this part will directly enhance the reference voltage accuracy and stability of the circuit. The minor 5mV difference in nominal voltage is negligible in the vast majority of applications and will not affect system functionality. The package description "Long Body" and the original part's "Formed Leads" are generally compatible both electrically and mechanically, posing no issue for the substitution.
2. TL431AILPRAG Substitution Conclusion
Full substitution is acceptable, and this part represents a closer alternative. The TL431AILPRAG shares identical key electrical parameters with the TL431AILPG (±1% accuracy, 2.495V), thus offering the same performance improvement advantages. Its differences from the original LM431ACZX are likewise the higher output voltage accuracy (±1%) and the slight nominal voltage difference (2.495V vs. 2.5V). Most importantly, its package description (TO-226-3, TO-92-3 (TO-226AA) Formed Leads) matches the original part exactly. This enables a seamless replacement in terms of PCB layout, lead forming, and mechanical installation, eliminating any uncertainty regarding physical fit.
Analysis ID: 2AEE-FF20000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com