Alternatives to Littelfuse 1SMC30AT3G
Littelfuse 1SMC30AT3G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMC30AT3GLittelfuse |  SMCJ30ALittelfuse Inc. | SMCJ30ABourns Inc. | +4more | |
|---|---|---|---|---|
| FFF Compatibility | Uses the identical DO-214AB (SMC) package with identical footprint, terminal dimensions, and anode/cathode polarity markings.Standard DO-214AB / SMC package shape, height, and mounting style.The minimum operating temperature of -55°C is slightly narrower than the original's -65°C rating, though the upper limit matches at 150°C and all electrical parameters are identical. | Uses the identical DO-214AB (SMC) package with identical footprint and anode/cathode polarity markings.Standard DO-214AB / SMC package shape, height, and mounting style.The minimum operating temperature is -55°C compared to the original's -65°C limit. All other electrical ratings are identical. | ||
 AI Summary | 1SMC30AT3G by Littelfuse: 48.4V Clamp 31A Ipp Tvs Diode Surface Mount SMC. | This is the direct industry-standard and manufacturer-recommended replacement for the obsolete 1SMC30AT3G. It matches all critical electrical specs, including a 30V reverse standoff voltage, 33.3V breakdown voltage, and 48.4V clamping voltage, making it a reliable active-status alternative.
| Bourns offers a direct second-source equivalent in the same DO-214AB package. It offers identical transient protection performance with a 1500W peak power rating, 48.4V clamping voltage, and 31A peak pulse current.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 48.4V Clamp 31A Ipp Tvs Diode Surface Mount SMC | 48.4V Clamp 31A Ipp Tvs Diode Surface Mount DO-214AB (SMCJ) | 48.4V Clamp 31A Ipp Tvs Diode Surface Mount DO-214AB (SMC) | |
| Manufacturer | Littelfuse | Littelfuse Inc. | Bourns Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 34 weeks | 19 weeks | 16 weeks | |
| Country of Origin | - | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0080 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Type | Zener | - | - | |
| Applications | General Purpose | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | DO-214AB, SMC | - | - | |
| Power - Peak Pulse | 1500W (1.5kW) | - | - | |
| Operating Temperature | -65°C ~ 150°C (TJ) | - | - | |
| Power Line Protection | No | - | - | |
| Supplier Device Package | SMC | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1SMC5.0AT3GLittelfuse | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
 1SMC18AT3GLittelfuse | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
| 1SMC48AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB5.0AT3Gonsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB18CAT3GLittelfuse | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
| 1SMB58CAT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1SMC30AT3G 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 1SMC30AT3G are the SMCJ30A (Littelfuse Inc.) and the SMCJ30A (Bourns Inc.), out of 6 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 1SMC30AT3G 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 1SMC30AT3G (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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