Alternative Part
1. TL431BCLPRMG Substitution Conclusion
The TL431BCLPRMG can serve as a direct replacement for the original LM431ACZX, as both share the same TO-92-3 package and are pin‑compatible. Key parameters such as maximum output voltage (36 V), output current (100 mA), temperature coefficient (typically 50 ppm/°C), and cathode current (1 mA) are essentially identical. The differences lie in the nominal output voltage (2.495 V for TL431BCLPRMG vs. 2.5 V for LM431ACZX) and output tolerance (±0.4 % vs. ±2 %). The substitute offers higher precision and stability, with a tighter output voltage deviation (approx. ±0.01 V). The slight nominal voltage offset (0.005 V) is negligible in most adjustable reference applications, and the tighter tolerance can contribute to improved system performance without causing functional failure. Therefore, the substitution is viable.
2. TL431BILPRAG Substitution Conclusion
The TL431BILPRAG is a suitable replacement for the original LM431ACZX, as both devices match in package, pinout, and core parameters including output voltage range, output current, temperature coefficient, and cathode current. Differences are similar to those noted for the TL431BCLPRMG: nominal output voltage (2.495 V for TL431BILPRAG vs. 2.5 V for LM431ACZX) and output tolerance (±0.4 % vs. ±2 %). The substitute provides superior voltage accuracy, with a narrower output voltage window (approximately 2.485 V to 2.505 V). The minor reduction in nominal voltage (0.005 V) can typically be compensated via external resistor trimming in practical circuits. Moreover, the higher‑precision reference can enhance system reliability. Hence, the substitution is not only feasible but may also deliver performance benefits.
Analysis ID: B422-C321000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com