Alternatives to Diodes Incorporated SMBJ51CA
Diodes Incorporated SMBJ51CA and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
| SMBJ51CADiodes Incorporated |  SMBJ51CALittelfuse Inc. | SMBJ51CABourns Inc. | +2more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts utilize the standard 2-pin SMD DO-214AA (SMB) footprint with identical pad layouts.Both parts are housed in the industry-standard DO-214AA (SMB) package with matching dimensions and height profiles.Matches all electrical characteristics including 600W peak pulse power, 51V standoff voltage, 56.7V minimum breakdown voltage, and 82.4V maximum clamping voltage. | Both parts utilize the standard 2-pin SMD DO-214AA (SMB) footprint with identical pad layouts.Both parts are housed in the industry-standard DO-214AA (SMB) package with matching dimensions and height profiles.Fully matches the 600W peak power rating, 51V standoff voltage, 56.7V breakdown voltage, and 82.4V clamping voltage. | ||
 AI Summary | SMBJ51CA by Diodes Incorporated: ESD Protection Diodes / TVS Diodes. | The Littelfuse SMBJ51CA is a direct, active drop-in replacement that matches all physical dimensions and electrical specifications of the obsolete Diodes Inc. part, with a slightly wider low-end operating temperature.
| The Bourns SMBJ51CA is an active, industry-standard drop-in equivalent that offers identical electrical ratings and package dimensions, providing a highly reliable second-source replacement.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | Unknown | REACH | REACH | |
| RoHS | Unknown | RoHS | RoHS | |
| Description | ESD Protection Diodes / TVS Diodes | 82.4V Clamp 7.3A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | 82.4V Clamp 7.3A Ipp Tvs Diode Surface Mount DO-214AA (SMB) | |
| Manufacturer | Diodes Incorporated | Littelfuse Inc. | Bourns Inc. | |
| Type | ESD Protection Diodes / TVS Diodes | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | Unknown | 12 weeks | 33 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | - | - | - | |
| Moisture Sensitivity Level | - | - | - |
Unlock all 4 alternatives
- Find & compare verified second sources
- Spot risk early with real-time part monitoring
- Stay compliant and production-ready
Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 SMBJ51Aonsemi | In stock | Active | 4Alternatives availableSee Alternatives |
| SMBJ18CADiodes Incorporated | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
| SMBJ58CADiodes Incorporated | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
| SMBJ100CAonsemi | In stock | Active | 8Alternatives availableSee Alternatives |
| SMBJ18ADiodes Incorporated | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
| SMBJ13Aonsemi | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
You searched one part. Parter watches your whole BOM.
All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.
Frequently asked questions
Yes. The Diodes Incorporated SMBJ51CA 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 SMBJ51CA are the SMBJ51CA (Littelfuse Inc.) and the SMBJ51CA (Bourns Inc.), out of 4 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the SMBJ51CA are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The SMBJ51CA (Diodes Incorporated) is a part in the ESD Protection Diodes / TVS Diodes category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
Schedule a demo
See Parter in action
Discover how Parter can help your hardware team:
- Streamline your hardware operations with AI
- Detect and prevent lifecycle disruptions
- Accelerate product development
- Stay compliant and production-ready