Alternatives to onsemi MBRS340
onsemi MBRS340 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
Equivalent and substitute parts for onsemi MBRS340
 MBRS340onsemi |  MBRS340T3Gonsemi | MBRS540T3Gonsemi | +5more | |
|---|---|---|---|---|
| FFF Compatibility | Matches the standard 2-pin SMC (DO-214AB) footprint and layout (Pin 1: Cathode, Pin 2: Anode).Standard SMC surface-mount package.While DigiKey sometimes lists it parametrically at 3A, the series maintains equivalent electrical performance and ratings up to 4A depending on thermal conditions. | Matches the standard 2-pin SMC (DO-214AB) footprint and layout (Pin 1: Cathode, Pin 2: Anode).Standard SMC surface-mount package.Meets or exceeds all safety ratings, providing a higher current margin of 5A. | ||
 AI Summary | MBRS340 by onsemi: Diode 40 V 4A Surface Mount DO-214AB (SMC). | The MBRS340T3G is the direct lead-free (Pb-free) equivalent of the obsolete MBRS340, continuing the same performance metrics under the active onsemi catalog. It offers exact physical and electrical alignment, making it the safest drop-in choice.
| The MBRS540T3G is an active upgrade within the same onsemi Schottky family, offering a higher continuous current rating of 5A. This provides a safety overhead margin for 4A designs while remaining completely drop-in compatible.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 MBR0540onsemi | Discontinued | Obsolete | 8Alternatives availableSee Alternatives |
 MBR0530onsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
 MMBT3640onsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
 BAS40Diodes Incorporated | In stock | Obsolete | 4Alternatives availableSee Alternatives |
 MURS320T3onsemi | Discontinued | Obsolete | 6Alternatives availableSee Alternatives |
 MBR0530T1onsemi | Discontinued | Obsolete | 5Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi MBRS340 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 MBRS340 are the MBRS340T3G (onsemi) and the MBRS540T3G (onsemi), out of 7 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 MBRS340 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 MBRS340 (onsemi) is a part in the Diodes category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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