SS56B
Yangzhou Yangjie Electronic Technology Co.,Ltd
Needs validationlow risk
A pin-compatible upgrade with higher voltage and current ratings in the same SMB package.
Best Alternatives to SS34B
The SS34B is a standard 40V, 3A Schottky diode in a DO-214AA (SMB) package. Excellent pin-compatible replacements are available, including the directly equivalent Vishay SS34 and the higher-rated SS56B upgrade.
AI replacement insight
Package riskhigh
Sourcing the wrong manufacturer for a part like SS34 will result in a non-fitting package.
Electrical risklow
Pin-compatible options have matching or superior voltage/current ratings. Vf differences are minor.
Can it be replaced directly?
Direct replacement for SS34B should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
For a direct match, use Vishay's SS34. For a robust upgrade, use Yangjie's SS56B. Both are in the same SMB package.
Main risk
The main risk is package incompatibility. Part numbers like 'SS34' are used by multiple brands for different packages (SMB, SMA, SMC). Always verify the manufacturer and datasheet.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | SS34B | SS56B | SS34 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AA (SMB) | DO-214AA (SMB) — Package matches, enabling drop-in replacement.; SS34: Only Vishay version is SMB. Other Mfrs use SMA/SMC. | |
| Voltage | 40V | 60V | 40V | 60V / 40V — Higher voltage rating provides more design margin.; SS34: Voltage rating matches target. | |
| Current | 3A | 5A | 3A | 5A / 3A — Higher current rating provides more design margin.; SS34: Current rating matches target. | |
| Vf | 550 mV @ 3 A | 700 mV @ 5 A | 500 mV @ 3 A | 700 mV @ 5 A / 500 mV @ 3 A — Forward voltage may differ. Review datasheet for performance at operating current.; SS34: Lower forward voltage improves efficiency. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SS34B 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.