SM6T30A
VISHAY
Needs validationlow risk
A strong functional alternative in the same package with a higher current rating and very similar standoff voltage.
Best Alternatives to SM6T36A
SM6T36A is a 600W unidirectional TVS diode in an SMB package for surge protection. Finding a substitute involves matching the 30.8V standoff voltage, 12A peak current, and unidirectional polarity.
AI replacement insight
Electrical riskmedium
Substitutes have different standoff voltages or current ratings.
Package risklow
All viable candidates share the same SMB package.
Firmware risklow
Not applicable for this passive component.
Can it be replaced directly?
No direct drop-in replacement has been identified. SM6T30A is the closest functional alternative but requires engineering review due to a slightly lower standoff voltage.
Best replacement path
SM6T30A offers the closest parametric match with an improved current rating, but its slightly lower standoff voltage must be validated against the application's maximum operating voltage.
Main risk
The primary risk is using a substitute with a lower standoff voltage (Vrwm), which could interfere with normal circuit operation.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | SM6T36A | SM6T30A | SM6T33A | SM6T39A | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SMB (DO-214AA) | SMB (DO-214AA) | SMB (DO-214AA) | SMB (DO-214AA) | SMB (DO-214AA) / DO-214AA (SMB) — Package matches, ensuring form and fit.; SM6T33A: Package matches.; SM6T39A: Package matches, ensuring form and fit.; SMBJ28A: Package matches, ensuring form and fit. |
| Polarity Or Type | Unidirectional | Unidirectional | Unidirectional | Unidirectional | Unidirectional — Polarity matches.; SM6T33A: Polarity matches.; SM6T39A: Polarity matches.; SMBJ28A: Polarity matches. |
| Voltage V | 30.8V | 30.0V | 28.2V | 33.3V | 30.0V / 28.2V / 33.3V / 28.0V — Slightly lower standoff voltage is a very close match but requires review.; SM6T33A: Lower standoff voltage may cause false clamping.; SM6T39A: Higher standoff voltage offers less protection but avoids false clamping.; SMBJ28A: Lower standoff voltage may cause clamping in normal operation. |
| Current A | 12.0A | 14.5A | 13.1A | 11.1A | 14.5A / 13.1A / 11.1A / 13.3A — Higher peak current rating provides more robust protection.; SM6T33A: Higher peak current rating.; SM6T39A: Lower peak current rating offers less surge protection.; SMBJ28A: Higher peak current rating provides more robust protection. |
| Power W | 600W | - | - | - | 600W — Peak power rating matches. |
Application & sourcing insights
Questions & answers
SM6T30A is a strong functional alternative with a higher current rating (14.5A) and a very similar standoff voltage (30.0V). However, the slightly lower voltage requires verification before use.