TL431-1
Goford Semiconductor
Needs validationmedium risk
Strong parametric match in the same package, but with a narrower operating temperature range that requires review.
Best Alternatives to CJ431K
CJ431K is a common SOT-23 adjustable shunt regulator. Alternatives from various manufacturers exist, but require careful verification of operating temperature and reference voltage precision to ensure reliability.
AI replacement insight
Electrical riskmedium
Candidates have different temperature ranges and minor reference voltage variations.
Package risklow
SOT-23 is a standard package and pinout for TL431 is common, but should be verified.
Sourcing risklow
The TL431 family is widely multi-sourced, offering many potential candidates.
Can it be replaced directly?
Direct replacement for CJ431K should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Goford TL431-1 is the closest parametric match but requires validating the reduced temperature range for the application.
Main risk
Mismatched operating temperature range is the primary risk, potentially causing failure in harsh environments.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | CJ431K | TL431-1 | TL431 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 — Form factor matches.; TL431: Form factor matches. | |
| Pinout | 3 | 3 | - | 3 — Pin count matches; pinout assumed standard for TL431 but requires verification. | |
| Voltage | 2.52V | 2.47V-2.52V | 2.5V | 2.47V-2.52V / 2.5V — Reference voltage range is compatible with target's typical value.; TL431: Reference voltage is slightly different. | |
| Temperature | -25°C to +125°C | -40°C to +85°C | 0°C to +70°C | -40°C to +85°C / 0°C to +70°C — Reduced upper temperature limit.; TL431: Significantly narrower commercial temperature range. | |
| Current | 1-100mA | 1-100mA | 1-100mA | 1-100mA — Cathode current range matches.; TL431: Cathode current range matches. |
Application & sourcing insights
Questions & answers
Verified drop-in options for CJ431K 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.