Alternatives to onsemi BAT54S
onsemi BAT54S and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 BAT54Sonsemi |  BAT54SLT1Gonsemi |  BAT54S,215Nexperia USA Inc. | +4more | |
|---|---|---|---|---|
| FFF Compatibility | Housed in an identical SOT-23 (TO-236AB) package with the same series configuration pinout: Pin 1 (Anode 1), Pin 2 (Cathode 2), and Pin 3 (Cathode 1/Anode 2).Identical package, footprint, and mounting height specifications as the original SOT-23 part.Matches the electrical envelope of the original with a maximum reverse voltage of 30V and forward current of 200mA. | Housed in an identical SOT-23 package with the exact same series-configured pinout matching Pin 1 (A1), Pin 2 (K2), and Pin 3 (K1/A2).Matches SOT-23 mechanical dimensions, lead spacing, and surface-mount footprint.Fully equivalent electrical specifications including 30V reverse voltage, 200mA rectified current, and 5ns reverse recovery time. | ||
 AI Summary | BAT54S by onsemi: Diode Array 1 Pair Series Connection 30 V 200mA Surface Mount TO-236-3, SC-59, SOT-23-3. | The onsemi BAT54SLT1G is an industry-standard, active drop-in replacement that matches all physical, dimensional, and electrical parameters of the obsolete original. It is widely stocked and provides a high-reliability second source.
| Nexperia's BAT54S,215 is an active, top-tier industry-standard replacement that delivers full physical and functional equivalence to the obsolete original, ensuring zero design modifications.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | In stock | In stock | Non-stock | |
| REACH | REACH | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
| Description | Diode Array 1 Pair Series Connection 30 V 200mA Surface Mount TO-236-3, SC-59, SOT-23-3 | Diode Array 1 Pair Series Connection 30 V 200mA (DC) Surface Mount TO-236-3, SC-59, SOT-23-3 | Schottky Diode Array 1 Pair Series Connection 30 V 200mA Surface Mount SOT-23 | |
| Manufacturer | onsemi | onsemi | Nexperia USA Inc. | |
| Type | Diodes | Diodes | Diodes | |
| Datasheet | Open | Open | Open | |
| Lead Time | 8 weeks | 52 weeks | 52 weeks | |
| Country of Origin | CN | - | - | |
| Export Control Class Number | EAR99 | EAR99 | EAR99 | |
| HTSUS Code | 8541.10.0070 | - | - | |
| Moisture Sensitivity Level | 1 (Unlimited) | - | - | |
| Speed | Very high switching speed | - | - | |
| Technology | SMD Small Signal Schottky Diodes | - | - | |
| Mounting Type | Surface Mount | - | - | |
| Package / Case | SOT-23 | - | - | |
| Diode Configuration | Series Connection | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 BAT54onsemi | In stock | Active | 7Alternatives availableSee Alternatives |
 BAT54Consemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 BAT54Aonsemi | In stock | Obsolete | 6Alternatives availableSee Alternatives |
 BAT42WTaiwan Semiconductor | Non-stock | NRND | 5Alternatives availableSee Alternatives |
 BAS16onsemi | In stock | Obsolete | 5Alternatives availableSee Alternatives |
| BAS28Nexperia | Non-stock | Active | 2Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi BAT54S 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 BAT54S are the BAT54SLT1G (onsemi) and the BAT54S,215 (Nexperia USA Inc.), 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 BAT54S 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 BAT54S (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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