Alternatives to Littelfuse 1SMB6.5AT3G
Littelfuse 1SMB6.5AT3G and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 1SMB6.5AT3GLittelfuse | SMBJ6.5ALittelfuse Inc. |  SMBJ6.5A-TRSTMicroelectronics | +4more | |
|---|---|---|---|---|
| FFF Compatibility | Drop-in replacement with identical DO-214AA (SMB) footprint, pin layout, and cathode polarity band.Identical physical package dimensions and SMD mounting style.Identical electrical specifications across all critical parameters (V_RWM, V_BR, V_C, I_PP, P_PK). | Standard DO-214AA package with identical mounting footprint and polarity orientation.Identical package dimensions and SMD form factor.Meets or exceeds all electrical parameters, offering slightly higher peak surge current capacity. | ||
 AI Summary | 1SMB6.5AT3G by Littelfuse: 11.2V Clamp 53.6A Ipp Tvs Diode Surface Mount SMB. | This is the direct manufacturer-recommended substitute from Littelfuse, offering identical electrical and physical characteristics in an active lifecycle state.
| An excellent alternative from STMicroelectronics that is fully drop-in compatible and provides a slightly higher peak pulse current handling capability of 56A.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | 11.2V Clamp 53.6A Ipp Tvs Diode Surface Mount SMB | 11.2V Clamp 53.6A Ipp Tvs Diode Surface Mount DO-214AA (SMBJ) | 11.2V Clamp 56A Ipp Tvs Diode Surface Mount SMB | |
| Manufacturer | Littelfuse | Littelfuse Inc. | STMicroelectronics | |
| Type | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | Transient Voltage Suppressors (TVS) | |
| Datasheet | Open | Open | Open | |
| Lead Time | 27 weeks | 17 weeks | 13 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 | - | - |
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 SMBJ51Aonsemi | In stock | Active | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The Littelfuse 1SMB6.5AT3G 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 1SMB6.5AT3G are the SMBJ6.5A (Littelfuse Inc.) and the SMBJ6.5A-TR (STMicroelectronics), out of 6 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Yes. The leading alternatives to the 1SMB6.5AT3G are fit-, form- and function-compatible — the same package and pinout with matching key electrical specifications — so they drop in without PCB changes. Always confirm the parameters critical to your design against the alternative's datasheet before committing.
The 1SMB6.5AT3G (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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