Package and footprint review
Clarify package fit, mechanical references, and footprint-related questions before design or sourcing moves forward.
BSS138L ON Semiconductor Datasheet PDF
Read the manufacturer datasheet for BSS138L by ON Semiconductor. Search the PDF, review the main part details, and request pricing for this Transistors - FETs, MOSFETs - Single component without leaving the page.
Manufacturer datasheetON Semiconductor
Part Number
BSS138LInternal code
TCE000056780
Package
SOT-23-3
Sub Category
Transistors - FETs, MOSFETs - Single
Request pricing
Need pricing, availability, or lead time for this part? Send a quote request while reviewing the datasheet.
Technical summary
Key document context
BSS138L from ON Semiconductor is a Transistors - FETs, MOSFETs - Single device in SOT-23-3 package. Use this manufacturer datasheet to review its electrical, mechanical, and ordering information.
Operating Temperature
-55 C to +150 C
Part Number
BSS138L
VDS (Drain-Source)
50 V
Use the BSS138L datasheet from ON Semiconductor to verify the ratings, package details, operating limits, and ordering information that apply to your design or sourcing decision.
Embedded PDF
Read the datasheet online
Loading PDF viewer...
Engineering support
Need technical help reviewing this datasheet?
If your team is stuck on package interpretation, pin-level review, missing electrical details, or qualification questions around BSS138L from ON Semiconductor, contact our engineering-friendly team for a more technical discussion.
Contact a hardware engineer
You can email our engineering support contact at [email protected], or use the contact page if your question needs a broader handoff.
Pin and interface checks
Work through pin naming, signal mapping, interface expectations, and other datasheet interpretation issues.
Qualification and documentation gaps
Surface the missing specs, compliance documents, or qualification details your team still needs before approval.
BSS138L cross reference and alternatives
BSS138L replacement and cross-reference parts
Review mapped alternatives for BSS138L from ON Semiconductor. Compare replacement type, package, lifecycle, stock, and sourcing context before RFQ or engineering approval.
Pin-to-pin optionDiodes IncorporatedSOT23
BSS138-7-F
Pin-to-pin P2P drop-in for the obsolete onsemi BSS138L. Identical SOT-23-3 footprint and pinout (1=Gate, 2=Drain, 3=Source). Same 50 V VDS, 200 mA ID, 3.5 ohm Rds(on) ratings. onsemi product page (2025) shows BSS138L lifecycle as 'Last Shipments' (the onsemi glossary defines this as the final 6-month shipment window before Obsolete), and DigiKey lists the part as 'Obsolete'. Diodes BSS138-7-F is the universal cross-vendor BSS138 drop-in listed as the primary parametric equivalent on Z2Data and Octopart.
Replacement Type
Pin-to-pin option
Lifecycle status
0
key Attributes
-
Available Quantity
16,061
Pin-to-pin optionInfineon TechnologiesSOT-23-3
BSS138N
Pin-to-pin P2P drop-in for the obsolete onsemi BSS138L. Infineon BSS138N is the SIPMOS small-signal N-channel MOSFET in PG-SOT-23 (3-pin) with identical SOT-23-3 footprint and pinout (1=Gate, 2=Drain, 3=Source). Same 3.5 Ω RDS(on) at the same gate drive — exact parametric replacement per Ovaga and DigiKey 'Similar' listings. 60 V VDS (vs BSS138L's 50 V) provides 20% extra voltage headroom. 0.23 A ID vs BSS138L's 0.20 A. Recommended primary drop-in for new designs after BSS138L is obsolete.
Replacement Type
Pin-to-pin option
Lifecycle status
0
key Attributes
-
Available Quantity
85,892
Pin-to-pin optionDiodes IncorporatedSOT23
BSN20-7
Pin-to-pin P2P drop-in for the obsolete onsemi BSS138L. Nexperia BSN20 (Diodes Incorporated 7-inch reel variant) is a 50 V N-channel enhancement mode MOSFET in SOT-23-3 with identical pinout to BSS138L. Logic-level gate drive (RDS(on) ~1.8 Ω at Vgs = 10 V), 0.18 A ID, 360 mW Pd. Same 50 V VDS class and SOT-23-3 footprint. Recommended when the design needs lower RDS(on) for reduced conduction loss vs BSS138L.
Replacement Type
Pin-to-pin option
Lifecycle status
0
key Attributes
-
Available Quantity
31,704
FunctionalDiodes IncorporatedSOT23
2N7002K-7
Functional alternative to the obsolete onsemi BSS138L. 2N7002K-7 (Nexperia / Diodes Incorporated) is a 60 V N-channel logic-level enhancement mode MOSFET in SOT-23-3 with the same pinout (1=Gate, 2=Drain, 3=Source). 0.115 A ID and ~3 Ω RDS(on) at Vgs = 10 V. Same logic-level gate drive and small-signal switching application class as BSS138L, but ~2x lower current rating. Use as drop-in when the design's continuous drain current is below 100 mA (level-shifting, load switch, simple analog switches).
Replacement Type
Functional
Lifecycle status
0
key Attributes
-
Available Quantity
82,177
Transistors - FETs, MOSFETs - Single
Recommended Products
Explore more parts from the same subcategory to compare fit, stock, and sourcing options.
AUIRFS3107-7P
149 purchased
TO-263-7
RoHS
Datasheet
MOSFET N-CH 75V 230A D2PAK-7P
Reference price
Needs inquiry
Common questions
Datasheet questions
What is BSS138L?
BSS138L is a Transistors - FETs, MOSFETs - Single component from ON Semiconductor. This page provides the manufacturer datasheet together with the core part information needed for review and sourcing.
How can I search inside the BSS138L datasheet PDF?
Use the PDF search field above the viewer. Search runs inside the PDF.js reader so you can review matches without leaving the document.
Can I request a quote for BSS138L while reading the datasheet?
Yes. Use the Request Quote action on this page to submit your email, quantity, and target price for BSS138L from ON Semiconductor.
What package information is available for BSS138L?
This datasheet page lists BSS138L with package reference SOT-23-3. Engineers should use the PDF to verify footprint, pin layout, and mechanical details before design or replacement decisions.
Which specifications should I check first in the BSS138L datasheet?
Start with the sections covering key ratings, electrical limits, interface behavior, and the attribute group beginning with Product Parameter. Those areas usually confirm whether BSS138L fits the intended design constraints.
Can I download the BSS138L datasheet PDF from this page?
Yes. This page provides a direct download for the BSS138L manufacturer datasheet PDF from ON Semiconductor, while keeping the HTML datasheet page available for search and review.