Alternative Part
1. TL431ACLPRAG Substitution Conclusion
The TL431ACLPRAG can directly replace the original KA431LZTA, though careful evaluation is advised for applications with stringent accuracy requirements. The key difference lies in the reference voltage tolerance, which has been widened from ±0.5% on the original to ±1%. Under extreme conditions, this may double the initial output voltage error, potentially affecting performance in voltage‑sensitive systems such as high‑precision regulation or sensing circuits. All other critical parameters—including output voltage range (2.495V–36V), output current (100mA), temperature coefficient (50ppm/°C), and package (TO‑92‑3)—remain identical. Therefore, the TL431ACLPRAG can serve as a drop‑in replacement in general‑purpose regulation, isolated feedback, or error‑amplifier applications where tight tolerance is not critical.
2. TL431BVLPRAG Substitution Conclusion
The TL431BVLPRAG is a higher‑precision alternative to the original KA431LZTA with full hardware compatibility. Its primary advantage is the tighter reference voltage tolerance of ±0.4%, compared to ±0.5% of the original, providing better initial voltage accuracy under the same conditions and contributing to improved system stability. All other parameters—output voltage range, current capability, and temperature coefficient—are identical. A minor notation difference exists in the package description (the TL431BVLPRAG is marked “Long Body”), but the mechanical dimensions remain compatible with the standard TO‑92‑3 footprint, posing no issue for mounting or soldering. This device can directly replace the original in all applications and is particularly suitable for circuit designs demanding higher precision.
Analysis ID: B846-BA9B000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com