RCLAMP0524PATCT
FUXINSEMI
Needs validationhigh risk
Shares package and polarity, but its 5V rating is a critical difference from the target's 3.3V and requires review.
Best Alternatives to AZ1143-04F
AZ1143-04F is a 4-line, 3.3V uni-directional TVS diode in a DFN2510-10 package, designed for protecting high-speed interfaces. Finding a substitute requires matching the critical 3.3V operating voltage, low capacitance, and package footprint.
AI replacement insight
Electrical riskhigh
A 5V TVS diode's clamping voltage is too high to protect a 3.3V circuit, potentially leading to component damage during an ESD event.
Package riskmedium
While the package name matches, pinout compatibility has not been verified and requires datasheet comparison.
Can it be replaced directly?
Direct replacement for AZ1143-04F should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Search for a TVS diode with a 3.3V rating, DFN2510-10 package, and capacitance of 0.3pF or less. The candidates listed are not recommended without significant design review.
Main risk
The primary risk is inadequate circuit protection due to the voltage mismatch between the 3.3V target and the 5V candidates.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | AZ1143-04F | RCLAMP0524PATCT | TPD4EUSB30DQAR-TP | RCLAMP0524P | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DFN2510-10 | DFN2510-10 | DFN2510-10 | DFN2510-10 | DFN2510-10 — Package dimensions and land pattern must be verified.; TPD4EUSB30DQAR-TP: Package dimensions and land pattern must be verified.; RCLAMP0524P: Package dimensions and land pattern must be verified.; RClamp0524P.TCT-MS: Package dimensions and land pattern must be verified. |
| Voltage | 3.3V | 5.0V | 5.0V | 5.0V | 5.0V — Higher operating voltage offers less protection for 3.3V circuits.; TPD4EUSB30DQAR-TP: Higher operating voltage offers less protection for 3.3V circuits.; RCLAMP0524P: Higher operating voltage offers less protection for 3.3V circuits.; RClamp0524P.TCT-MS: Higher operating voltage offers less protection for 3.3V circuits. |
| Capacitance | 0.3pF | 0.3pF | 0.3pF | 0.35pF | 0.3pF / 0.35pF / 0.6pF — Low capacitance is suitable for high-speed lines.; TPD4EUSB30DQAR-TP: Low capacitance is suitable for high-speed lines.; RCLAMP0524P: Slightly higher capacitance may be acceptable for some applications.; RClamp0524P.TCT-MS: Higher capacitance may impact signal integrity on high-speed lines. |
| Polarity | Uni-directional | - | Uni-directional | - | Uni-directional — Polarity matches target. |
Application & sourcing insights
Questions & answers
Verified drop-in options for AZ1143-04F 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.