Original Part
Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2.21% 100 mA SOT-23-3
Alternative Part
1. TL431QDBZR Substitution Conclusion
The TL431QDBZR is a fully compatible substitute for the original TL431CL3T. All key electrical parameters are identical: both are adjustable shunt references with the same output voltage range (2.495V–36V), maximum cathode current (100mA), minimum operating cathode current (1mA), and package (SOT-23-3). The sole nominal difference is the initial reference voltage accuracy, specified as ±2.2% for the TL431QDBZR versus ±2.21% for the TL431CL3T. This 0.01% deviation is negligible for the vast majority of applications, and TI's actual accuracy may even be superior. The devices are directly interchangeable in terms of circuit functionality, performance, and PCB footprint. However, it is important to note that the change in manufacturer may introduce differences in supply chain, pricing, and quality control processes. It is recommended to verify reference voltage stability and temperature performance in the target application after substitution.
2. TL431QDBZT Substitution Conclusion
The TL431QDBZT is also a fully compatible substitute for the original TL431CL3T. All core parameters—including adjustable output range, current capability, package type, and operating conditions—are identical to those of the original part. Its initial accuracy of ±2.2% differs only nominally from the TL431CL3T's ±2.21%, with no practical impact on circuit performance. This device is typically from the same die lot as the TL431QDBZR mentioned above, with potential differences only in reel packaging specifications (e.g., reel size or orientation). Electrical substitution is highly feasible, and the part can be used directly in the original design. Prior to large-scale replacement, however, it is advisable to confirm that the manufacturer change does not affect long-term system reliability and to be aware of potential minor variances in unspecified parameters such as dynamic impedance and noise between TI and ST.
Analysis ID: 2AE8-B040000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com