Original Part
Alternative Part
1. AZ431AZ-ATRG1 Substitution Conclusion
The AZ431AZ-ATRG1 matches the original TL1431CZ-AP in all key parameters, including output voltage range (2.5V to 36V), tolerance (±0.4%), output current (100mA), and cathode current (1mA). It shares the same TO-92-3 package and is pin‑compatible, enabling a direct drop‑in replacement. The primary distinction is its significantly lower temperature coefficient (20ppm/°C typical vs. 90ppm/°C for the original). This provides a more stable reference voltage under varying temperature conditions, making the AZ431AZ-ATRG1 performance‑superior overall. It is particularly suitable for precision circuits where temperature stability is critical. The substitution is highly feasible and requires no additional design modifications.
2. TL431CLPRPG Substitution Conclusion
The TL431CLPRPG is broadly compatible with the original TL1431CZ-AP in terms of maximum output voltage (36V) and output current (100mA). However, there are notable differences: its tolerance is wider (±2.2% vs. ±0.4%), reducing output voltage accuracy and making it unsuitable for precision reference applications. The minimum output voltage is 2.495V (vs. 2.5V), a slight deviation generally acceptable in most circuits. Its temperature coefficient is 50ppm/°C typical, offering better temperature stability than the original’s 90ppm/°C. The device uses an extended TO-92-3 package; while pin‑compatible, the physical dimensions differ slightly. Substitution is viable in applications where high voltage accuracy is not critical—such as general‑purpose regulation or non‑critical reference circuits—and where improved temperature performance is desired. It is not recommended for applications requiring the original’s ±0.4% high precision.
Analysis ID: 1D8E-D9F8000
Based on part parameters and for reference only. Not to be used for procurement or production.
SkyChip © 2026, Email: sales@skychip.com