Alternatives to Littelfuse 1SMB24AT3G
Littelfuse 1SMB24AT3G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMB24AT3GLittelfuse | SZ1SMB24AT3GLittelfuse Inc. |  SMBJ24ALittelfuse Inc. | +6more | |
|---|---|---|---|---|
| FFF Compatibility | Identical DO-214AA (SMB) footprint and standard cathode/anode pin configuration.Same physical dimensions and SMD mounting style.Identical electrical specifications (600W peak power, 24V standoff, 38.9V clamp) with added AEC-Q101 automotive qualification. | Identical DO-214AA (SMBJ) footprint and standard polarity.Same physical dimensions and SMD mounting style.Exactly matches the original electrical parameters. | ||
 AI Summary | 1SMB24AT3G by Littelfuse: 38.9V Clamp 15.4A Ipp Tvs Diode Surface Mount SMB. | This is the direct AEC-Q101 qualified automotive-grade sibling from Littelfuse. It offers identical electrical parameters, peak power, and package dimensions, making it a perfect active replacement.
| The SMBJ24A is the standard commercial-grade direct replacement designated by the manufacturer. It offers identical electrical specifications and footprints.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 38.9V Clamp 15.4A Ipp Tvs Diode Surface Mount SMB | 38.9V Clamp 15.4A Ipp Tvs Diode Surface Mount SMB | 38.9V Clamp 15.5A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | |
| Manufacturer | Littelfuse | Littelfuse Inc. | Littelfuse Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 27 weeks | 17 weeks | 14 weeks | |
| Country of Origin | CN | - | - | |
| 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-214AA, SMB | - | - | |
| Power - Peak Pulse | 600W | - | - | |
| Operating Temperature | -65°C ~ 150°C (TJ) | - | - | |
| Power Line Protection | No | - | - | |
| Capacitance @ Frequency | 675pF @ 1MHz | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1SMB24AT3onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1SMB48AT3GLittelfuse | Discontinued | Obsolete | 9Alternatives availableSee Alternatives |
| 1SMB51AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
| 1SMB6.5AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMC48AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB5.0AT3Gonsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1SMB24AT3G 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 1SMB24AT3G are the SZ1SMB24AT3G (Littelfuse Inc.) and the SMBJ24A (Littelfuse Inc.), out of 8 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 1SMB24AT3G 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 1SMB24AT3G (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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