Alternatives to Diodes Incorporated SMBJ18A
Diodes Incorporated SMBJ18A and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
| SMBJ18ADiodes Incorporated |  SMBJ18ALittelfuse Inc. |  SMBJ18A-E3/52Vishay General Semiconductor | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts utilize the JEDEC DO-214AA (SMB) package with identical land pattern requirements and terminal polarities (indicated by a cathode band).Both use the standard DO-214AA (SMB) surface mount package dimensions.Matches all key electrical specifications including 18V reverse standoff voltage, 20.0V minimum breakdown voltage, and 600W peak pulse power. | Matches the standard DO-214AA (SMB) package and pinout footprint perfectly.Employs standard DO-214AA (SMB) package outlines.Identical electrical specifications across breakdown voltage, clamping voltage, standoff voltage, and power rating. | ||
 AI Summary | SMBJ18A by Diodes Incorporated: 29.2V Clamp 20.6A Ipp TVS Diode, DO-214AA (SMB). | This is a direct drop-in replacement from Littelfuse with identical physical dimensions and identical electrical parameters. It features an active product lifecycle, making it an excellent upgrade for the obsolete Diodes Incorporated part.
| The Vishay SMBJ18A-E3/52 is a highly reliable TransZorb TVS diode that serves as a direct, active replacement. It has identical physical, pinout, and electrical characteristics to the obsolete Diodes Incorporated part.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | Unknown | REACH | REACH | |
| RoHS | Unknown | RoHS | RoHS | |
| Description | 29.2V Clamp 20.6A Ipp Tvs Diode Surface Mount DO-214AA (SMB) | 29.2V Clamp 20.6A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | 29.2V Clamp 20.5A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | |
| Manufacturer | Diodes Incorporated | Littelfuse Inc. | Vishay General Semiconductor | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | Unknown | 12 weeks | 18 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | - | - | - | |
| Moisture Sensitivity Level | - | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
| SMBJ18CADiodes Incorporated | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
 SMBJ51Aonsemi | In stock | Active | 4Alternatives availableSee Alternatives |
 SMCJ12Aonsemi | In stock | Active | 5Alternatives availableSee Alternatives |
 SMCJ48ADiodes Incorporated | In stock | Obsolete | 5Alternatives availableSee Alternatives |
| SMBJ24ADiodes Incorporated | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
| SMAJ58ADiodes Incorporated | Discontinued | Obsolete | 10Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Diodes Incorporated SMBJ18A is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the Diodes Incorporated SMBJ18A are the SMBJ18A (Littelfuse Inc.) and the SMBJ18A-E3/52 (Vishay General Semiconductor), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the SMBJ18A are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The SMBJ18A (Diodes Incorporated) is a part in the Transient Voltage Suppressors (TVS) category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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