LM431SBCM3X Replacement: TL431FDT,215, LM431SCCM32X

Original Part

LM431SBCM3X

onsemi

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±1% 100 mA SOT-23-3

Alternative Part

TL431FDT,215

Nexperia USA Inc.

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±2% 100 mA TO-236AB

LM431SCCM32X

onsemi

Shunt Voltage Reference IC Adjustable 2.495V 36 VV ±0.5% 100 mA SOT-23-3

1. TL431FDT,215 Substitution Conclusion Conditional substitution is feasible, but key performance downgrades must be considered. The TL431FDT,215 is compatible with the original part in core architecture, voltage and current specifications (2.495V-36V, 100mA), and package. The primary differences are its initial accuracy of ±2%, which is inferior to the original's ±1%, and its unspecified temperature coefficient. This implies that across a wide temperature range or in applications demanding strict output voltage accuracy, its performance may not match that of the original part. However, it carries AEC-Q100 automotive qualification. For automotive electronics or industrial applications with relaxed accuracy requirements, this part can serve as a viable substitute due to its high reliability.

2. LM431SCCM32X Substitution Conclusion Direct substitution is recommended, and it represents a performance upgrade. The LM431SCCM32X is from the same manufacturer as the original part and shares identical electrical characteristics and package. The key improvement is its enhanced initial accuracy of ±0.5%, which is significantly better than the original's ±1%, while the temperature coefficient (50ppm/°C) remains unchanged. In all applications, this part will provide higher output voltage accuracy and stability compared to the original. It is a pin-compatible, drop-in replacement with superior performance, requiring no additional design modifications to improve system performance.

Analysis ID: 0EB9-8053000

Based on part parameters and for reference only. Not to be used for procurement or production.