Original Part
Alternative Part
Shunt Voltage Reference IC Adjustable 2.5V 36 VV ±0.5% 100 mA SOT-23-3
1. AN431AN-ATRE1 Substitution Conclusion
The AN431AN-ATRE1 can serve as a viable substitute for the KA431SLMFTF, though minor differences should be considered. Both are adjustable shunt references with identical output voltage ranges (up to 36V), tolerance (±0.5%), and pin-compatible SOT-23-3 packages. Key distinctions include: the AN431AN has a nominal output voltage of 2.5V compared to 2.495V for the KA431. While these values overlap within the specified tolerance, the slight offset in the center value could affect applications with stringent absolute voltage accuracy requirements. Additionally, the AN431AN offers a superior temperature coefficient (20ppm/°C vs. 50ppm/°C), providing better stability over temperature variations. Overall, if the circuit is not sensitive to the exact 2.495V reference, this part offers a drop-in replacement with enhanced temperature performance.
2. NCP432BVSNT1G Substitution Conclusion
The NCP432BVSNT1G is not suitable for direct substitution of the KA431SLMFTF due to fundamental differences in key parameters. Although both share similar output voltage ranges, tolerances, and package outlines, the NCP432 is limited to an output current of 40µA (vs. 100mA for the KA431) and a cathode current of 100mA (vs. 1mA for the KA431). The NCP432 cannot supply sufficient load current and is intended only for micropower applications. The difference in cathode current will also alter the external bias resistor design, potentially shifting the original circuit’s operating point outside its intended range. Unless the application operates at extremely low power and the surrounding circuitry is recalculated accordingly, a compatible replacement is not feasible.
Analysis ID: 6586-B884000
Based on part parameters and for reference only. Not to be used for procurement or production.
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