Alternatives to VIITOR SEMICONDUCTOR CO., LTD SMBJ18A
VIITOR SEMICONDUCTOR CO., LTD SMBJ18A and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 SMBJ18AVIITOR SEMICONDUCTOR CO., LTD |  SMBJ18ABourns Inc. | SMBJ18ALittelfuse Inc. | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Both are in the standard SMD 2-pin DO-214AA (SMB) package with identical pad footprint and anode/cathode polarity.Identical package dimensions and surface-mount package.Meets all critical TVS diode parameters including 600W peak pulse power, 18V reverse standoff voltage, and 29.2V maximum clamping voltage. | Standard DO-214AA (SMB) package with pin 1 designated as the cathode.Identical physical shape and SMD mounting style.Perfect match for all standard unidirectional TVS characteristics including peak pulse current (20.6A) and voltage breakdown (20V min). | ||
 AI Summary | SMBJ18A by VIITOR SEMICONDUCTOR CO., LTD: 29.2V Clamp 20.5A Ipp Tvs Diode Surface Mount DO-214AA (SMB). | This is a direct drop-in replacement from a top-tier manufacturer, utilizing the identical industry-standard part numbering scheme. It offers equivalent electrical, thermal, and mechanical characteristics to replace the obsolete Viitor Semiconductor device.
| An industry-standard direct equivalent from Littelfuse, this part shares the same MPN and offers excellent surge protection reliability. It is actively supported and widely stocked by distributors.
| |
| Lifecycle Status | NRND | Active | Active | |
| Market Availability | In stock | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 29.2V Clamp 20.5A Ipp Tvs Diode Surface Mount DO-214AA (SMB) | 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) | |
| Manufacturer | VIITOR SEMICONDUCTOR CO., LTD | Bourns Inc. | Littelfuse Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 19 weeks | 21 weeks | 12 weeks | |
| Country of Origin | IN, CN, TW | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | Zener | - | - | |
| Grade | Automotive | - | - | |
| Applications | General Purpose | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Qualification | AEC-Q101 | - | - | |
| Package / Case | DO-214AA, SMB | - | - | |
| Power - Peak Pulse | 600W | - | - | |
| Operating Temperature | -55°C ~ 150°C (TJ) | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
| SMBJ18ADiodes Incorporated | Discontinued | Obsolete | 3Alternatives availableSee Alternatives |
| SMBJ18CADiodes Incorporated | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
| SMBJ48ADiodes Incorporated | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| SMBJ13Aonsemi | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
 SMBJ51Aonsemi | In stock | Active | 4Alternatives availableSee Alternatives |
| SMBJ51CADiodes Incorporated | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
No. The VIITOR SEMICONDUCTOR CO., LTD SMBJ18A is marked not-recommended-for-new-designs (NRND): it is still supplied for existing production but the manufacturer discourages new sockets. The qualified alternatives here are better long-term choices for a new design.
The closest qualified second sources for the VIITOR SEMICONDUCTOR CO., LTD SMBJ18A are the SMBJ18A (Bourns Inc.) and the SMBJ18A (Littelfuse Inc.), out of 5 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 SMBJ18A 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 SMBJ18A (VIITOR SEMICONDUCTOR CO., LTD) 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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