TL431AQDBZR
Nexperia USA Inc.
Needs validationmedium risk
Same TL431 shunt role and package; looser tolerance needs design review.
Best Alternatives to TL431BQDBZR
TL431BQDBZR is a 0.5% adjustable shunt reference in SOT-23-3. The closest listed options need FAE review because pinout evidence is missing.
AI replacement insight
Electrical riskmedium
tolerance or temp may be weaker
Package riskmedium
SOT-23-3 shown, pinout missing
Firmware risklow
no firmware interface indicated
Sourcing risklow
kept candidates are active
Can it be replaced directly?
Direct replacement for TL431BQDBZR should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use TL431AQDBZR for full temperature range, or TL431BCDBZR for 0.5% accuracy at 0-70C.
Main risk
Pinout is not verified and several options relax accuracy or temperature.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | TL431BQDBZR | TL431AQDBZR | TL431BCDBZR | TL431AIDBZR | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23-3 | SOT-23-3 | SOT-23-3 | SOT-23-3 | SOT-23-3 — same package text; TL431BCDBZR: same package text; TL431AIDBZR: same package text |
| Pinout | 3 pins | 3 pins | 3 pins | 3 pins | 3 pins — pin functions absent; TL431BCDBZR: pin functions absent; TL431AIDBZR: pin functions absent |
| Voltage | 2.495-36V | 2.495-36V | 2.495-36V | 2.495-36V | 2.495-36V — range aligns; TL431BCDBZR: range aligns; TL431AIDBZR: range aligns |
| Current | 100mA | 100mA | 100mA | 100mA | 100mA — same output current; TL431BCDBZR: same output current; TL431AIDBZR: same output current |
| Tolerance | ±0.5% | ±1% | ±0.5% | ±1% | ±1% / ±0.5% — accuracy downgrade; TL431BCDBZR: same initial tol; TL431AIDBZR: accuracy downgrade |
| Temperature | -40 to 125C | -40 to 125C | 0 to 70C | -40 to 85C | -40 to 125C / 0 to 70C / -40 to 85C — range aligns; TL431BCDBZR: commercial only; TL431AIDBZR: upper temp lower |
Application & sourcing insights
Questions & answers
Verified drop-in options for TL431BQDBZR are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.