Alternatives to onsemi BSS138_NL
onsemi BSS138_NL 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 BSS138_NL
 BSS138_NLonsemi |  BSS138onsemi |  BSS138-7-FDiodes Incorporated | +3more | |
|---|---|---|---|---|
| FFF Compatibility | Standard SOT-23 package with identical Pin 1 (Gate), Pin 2 (Source), and Pin 3 (Drain) pinout configuration.Industry standard SOT-23-3 surface mount footprint matching the legacy Fairchild/onsemi physical dimensions.Fully matches all primary electrical parameters: 50V Vds, 220mA continuous drain current, and 3.5 Ohm RDS(ON) at Vgs = 10V. | Standard SOT-23 pin assignment (Gate on Pin 1, Source on Pin 2, Drain on Pin 3) matches the target.Standard SOT-23 package body size matches the original layout perfectly.Meets all functional specs with 50V Vds, 200mA continuous drain current, and ±20V Vgs limit. | ||
 AI Summary | BSS138_NL by onsemi: N-Channel Logic Level Enhancement Mode MOSFET, SOT-23. | This is the active, standard version of the BSS138 series directly from onsemi (which acquired Fairchild), serving as the most direct non-lead-free-restricted replacement.
| A standard, widely available second-source alternative that provides highly stable electrical characteristics matching the legacy Fairchild BSS138 specifications.
| |
| Lifecycle Status | Obsolete | Active | Active | |
| Market Availability | Discontinued | In stock | In stock | |
| REACH | Unknown | REACH | REACH | |
| RoHS | RoHS | RoHS | RoHS | |
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| —— ————— | ———— —————— | —— ————— ——— | ——————— ———— |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 BSS138onsemi | In stock | Active | 5Alternatives availableSee Alternatives |
 BSS138LT1onsemi | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
| BSS84_NLonsemi | Discontinued | Obsolete | 8Alternatives availableSee Alternatives |
 BSS138TADiodes Incorporated | In stock | NRND | 5Alternatives availableSee Alternatives |
 SN74LS138NTexas Instruments | In stock | Active | 5Alternatives availableSee Alternatives |
| BSS84Diodes Incorporated | Non-stock | Active | 6Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The onsemi BSS138_NL 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 BSS138_NL are the BSS138 (onsemi) and the BSS138-7-F (Diodes Incorporated), out of 5 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 BSS138_NL 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 BSS138_NL (onsemi) is a part in the MOSFETs category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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