Alternatives to Littelfuse 1SMC18AT3G
Littelfuse 1SMC18AT3G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMC18AT3GLittelfuse |  SMCJ18ALittelfuse Inc. | SMCJ18ABourns Inc. | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Both parts are housed in the industry-standard DO-214AB (SMC) surface-mount package with identical land patterns and physical footprint dimensions.The package shape, mounting style, and dimensions match the original part exactly.Features the exact same 18V reverse standoff voltage, 20V minimum breakdown voltage, 29.2V clamping voltage, and 1500W peak pulse power rating. | Uses the same DO-214AB (SMC) physical package and pin configuration.Identical outer package dimensions and mounting outline.Matches the electrical specifications of the original part with no compromises. | ||
 AI Summary | 1SMC18AT3G by Littelfuse: 29.2V Clamp 51.4A Ipp Tvs Diode Surface Mount SMC. | The SMCJ18A is the direct manufacturer-recommended, active replacement for the obsolete 1SMC18AT3G, featuring identical electrical ratings and package dimensions.
| The Bourns SMCJ18A offers a high-reliability second-source drop-in replacement with identical electrical and mechanical parameters.
| |
| Lifecycle Status | Obsolete | Unknown | Active | |
| Market Availability | Discontinued | Unknown | In stock | |
| REACH | REACH | Unknown | REACH | |
| RoHS | RoHS | Unknown | RoHS | |
| Description | 29.2V Clamp 51.4A Ipp Tvs Diode Surface Mount SMC | The SMCJ18A is the direct manufacturer-recommended, active replacement for the obsolete 1SMC18AT3G, featuring identical electrical ratings a | 29.2V Clamp 51.4A Ipp Tvs Diode Surface Mount DO-214AB (SMC) | |
| Manufacturer | Littelfuse | Littelfuse Inc. | Bourns Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Component | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | N/A | Open | |
| Lead Time | 34 weeks | Unknown | 20 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | TVS | - | - | |
| Applications | Communication systems, automotive, numerical controls, process controls, medical equipment, business machines, power supplies | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | DO-214AB | - | - | |
| Power - Peak Pulse | 1500.0W | - | - | |
| Power Line Protection | False | - | - | |
| Supplier Device Package | SMC | - | - | |
| Unidirectional Channels | 1.0 | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1SMC48AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB18CAT3GLittelfuse | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
 1SMB48AT3GLittelfuse | Discontinued | Obsolete | 9Alternatives availableSee Alternatives |
| 1SMB51AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMC30AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
| 1SMC5.0AT3GLittelfuse | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1SMC18AT3G 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 Littelfuse 1SMC18AT3G are the SMCJ18A (Littelfuse Inc.) and the SMCJ18A (Bourns 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 1SMC18AT3G 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 1SMC18AT3G (Littelfuse) 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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