Alternatives to onsemi 1SMB24AT3
onsemi 1SMB24AT3 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMB24AT3onsemi |  SMBJ24Aonsemi | SMBJ24ALittelfuse Inc. | +3more | |
|---|---|---|---|---|
| FFF Compatibility | The part features the exact same 2-pin DO-214AA (SMB) package footprint and polarity configuration (unidirectional).The dimensions, height, and mounting style are completely identical.The peak pulse power (600W), standoff voltage (24V), minimum breakdown (26.7V), and clamping voltage (38.9V) are identical. | The device utilizes the industry-standard DO-214AA (SMB) 2-pin package with the exact same layout.The physical envelope, profile height, and termination styles match perfectly.All primary electrical specifications including standoff voltage, breakdown voltage, and clamping limits are identical. | ||
 AI Summary | 1SMB24AT3 by onsemi: 38.9V Clamp 15.4A Ipp Tvs Diode Surface Mount SMB. | This is the official active, modern equivalent from onsemi, offering fully identical physical footprint, electrical specifications, and polarity while resolving the obsolete status of the legacy part.
| Littelfuse is a premier manufacturer in circuit protection, making their SMBJ24A a top-tier industry-standard replacement with identical electrical and physical characteristics.
| |
| Lifecycle Status | Obsolete | NRND | 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 15.5A Ipp Tvs Diode Surface Mount DO-214AA (SMB) | 38.9V Clamp 15.5A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | |
| Manufacturer | onsemi | onsemi | Littelfuse Inc. | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | Unknown | 7 days | 14 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-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 |
|---|---|---|---|
 1SMB24AT3GLittelfuse | Discontinued | Obsolete | 8Alternatives 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 |
 1SMB18CAT3onsemi | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi 1SMB24AT3 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 onsemi 1SMB24AT3 are the SMBJ24A (onsemi) and the SMBJ24A (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 1SMB24AT3 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 1SMB24AT3 (onsemi) 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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