SM6T30A
VISHAY
Needs validationlow risk
A strong alternative in the same package with higher voltage and current ratings, offering increased design margin.
Best Alternatives to SM6T33A
Finding a replacement for the SM6T33A TVS diode involves matching its 600W power rating, 28.2V standoff voltage, and SMB package. Several alternatives exist with similar or improved electrical characteristics.
AI replacement insight
Electrical riskmedium
Substitutes must match or exceed standoff voltage and peak current ratings.
Package risklow
Many alternatives exist in the same SMB (DO-214AA) package.
Firmware risklow
Not applicable for this type of passive component.
Can it be replaced directly?
Direct replacement for SM6T33A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The SM6T30A from Vishay is a strong candidate, offering a similar form factor with slightly higher voltage and current ratings for increased design margin.
Main risk
The primary risk is selecting a part with a lower standoff voltage (Vrwm) or peak current (Ipp) rating, which could compromise circuit protection.
Recommended alternatives
2Alternative comparison matrix
| Feature / factor | SM6T33A | SM6T30A | SMBJ28A | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMB (DO-214AA) | SMB (DO-214AA) | DO-214AA (SMB) | SMB (DO-214AA) / DO-214AA (SMB) — Same package family ensures physical compatibility.; SMBJ28A: Same package family. | |
| Polarity Or Type | Unidirectional | Unidirectional | Unidirectional | Unidirectional — Polarity matches the target's requirement.; SMBJ28A: Polarity matches. | |
| Voltage V | 28.2V | 30.0V | 28.0V | 30.0V / 28.0V — Higher standoff voltage provides more operating margin.; SMBJ28A: Slightly lower standoff voltage is a downgrade risk. | |
| Current A | 13.1A | 14.5A | 13.3A | 14.5A / 13.3A — Higher peak pulse current rating improves robustness.; SMBJ28A: Slightly higher peak current rating. | |
| Power W | 600W | 600W | - | 600W — Power rating is identical. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SM6T33A 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.