Alternatives to Littelfuse 1SMB48AT3G
Littelfuse 1SMB48AT3G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMB48AT3GLittelfuse | SZ1SMB48AT3GLittelfuse Inc. |  SMBJ48ALittelfuse Inc. | +7more | |
|---|---|---|---|---|
| FFF Compatibility | Exact 2-pin SMB package footprint with Pin 1 as Cathode (polarity band) and Pin 2 as Anode.Same DO-214AA / SMB surface-mount package dimensions.Matches or exceeds all safety and electrical performance specs including 600W peak pulse power rating. | Exact 2-pin SMB package footprint with Pin 1 as Cathode (polarity band) and Pin 2 as Anode.Same DO-214AA / SMB surface-mount package dimensions.Matches or exceeds all safety and electrical performance specs including 600W peak power. | ||
 AI Summary | 1SMB48AT3G by Littelfuse: 77.4V Clamp 7.7A Ipp Tvs Diode Surface Mount SMB. | This is the active, AEC-Q101 automotive-qualified sibling of the obsolete 1SMB48AT3G, built on the same silicon lineage and providing a perfect drop-in replacement with identical electrical and thermal performance.
| This is the official active replacement recommended by Littelfuse, belonging to the highly standard and widely available SMBJ series.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 77.4V Clamp 7.7A Ipp Tvs Diode Surface Mount SMB | 77.4V Clamp 7.7A Ipp Tvs Diode Surface Mount SMB | 77.4V Clamp 7.8A 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 | 11 weeks | |
| Country of Origin | VN | - | - | |
| 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 | 365pF @ 1MHz | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 1SMB24AT3GLittelfuse | Discontinued | Obsolete | 8Alternatives availableSee Alternatives |
 1SMC48AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB18CAT3GLittelfuse | Discontinued | Obsolete | 7Alternatives availableSee Alternatives |
| 1SMB58CAT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 1SMB24AT3onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
 1SMB51AT3GLittelfuse | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1SMB48AT3G 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 1SMB48AT3G are the SZ1SMB48AT3G (Littelfuse Inc.) and the SMBJ48A (Littelfuse Inc.), out of 9 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 1SMB48AT3G 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 1SMB48AT3G (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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