What is a cross-reference page for BSS138?
This page groups mapped replacement options for BSS138 so buyers and engineers can compare alternatives before requesting a quote or approving a substitute.
Alternative part analysis
BSS138 replacements, alternatives, and cross reference
Compare mapped replacement and alternative options for BSS138, then verify package, specifications, and application fit before approval.
Compare BSS138 against mapped replacement options
Review package, lifecycle, stock, and MOQ in one view
Move from engineering screening to RFQ without leaving the page
No mapped replacement parts yet
This product currently does not show a published cross-reference list. Use RFQ support if your team needs an alternative part review.
Specification view
Parameter Comparison Chart
A side-by-side view of the source part and its mapped alternatives so buyers and engineers can screen package, availability, lifecycle, and key descriptors before RFQ.
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The left column stays visible so buyers can keep the spec label in view while scanning multiple alternatives.
| Parameter Comparison Chart | Current part BSS138 ON Semiconductor |
|---|---|
| Part Number | BSS138 |
| Manufacturer | ON Semiconductor |
| Category | Discrete Semiconductor Products |
| Subcategory | Transistors - FETs, MOSFETs - Single |
| Package | SOT-23 |
| Series | - |
| Key Attributes | - |
| Description | MOSFET N-CH 50V 220MA SOT-23 |
| Lifecycle | - |
| Stock | 176,215 |
| Available | 81,020 |
| Min Order | 1 |
| Datasheet | Available |
| Turn-Off Delay Time | 20 ns |
| Number of Elements | 1 |
| Turn On Delay Time | 2.5 ns |
| Rise Time | 9ns |
| Dual Supply Voltage | 50V |
| Drain to Source Voltage (Vdss) | 50V |
| Rds On Max | 3.5 Ω |
| Drain to Source Resistance | 3.5Ohm |
| Part Status | Active |
| Lead Free | Lead Free |
| Mounting Type | Surface Mount |
| Min Operating Temperature | -55°C |
| Factory Lead Time | 8 Weeks |
| Lifecycle Status | ACTIVE (Last Updated: 6 days ago) |
| Published | 2002 |
| Packaging | Tape & Reel (TR) |
| Termination | SMD/SMT |
| Element Configuration | Single |
| Manufacturer | ON Semiconductor |
| Power Dissipation | 360mW |
| Technology | MOSFET (Metal Oxide) |
| FET Type | N-Channel |
| Sub-Categories | Transistors - FETs, MOSFETs - Single |
| Vgs (Max) | ±20V |
| Categories | Discrete Semiconductor Products |
| Operating Temperature | -55°C~150°C TJ |
| Drive Voltage (Max Rds On,Min Rds On) | 4.5V 10V |
| Weight | 30mg |
| Package / Case | TO-236-3, SC-59, SOT-23-3 |
| Contact Plating | Tin |
| Radiation Hardening | No |
| Mount | Surface Mount |
| Number of Pins | 3 |
| Gate to Source Voltage (Vgs) | 20V |
| Max Operating Temperature | 150°C |
| Width | 1.3mm |
| Fall Time (Typ) | 9 ns |
| Voltage - Rated DC | 50V |
| Continuous Drain Current (ID) | 220mA |
| Current Rating | 220mA |
| Current - Continuous Drain (Id) @ 25°C | 220mA Ta |
| Length | 2.92mm |
| Nominal Vgs | 1.3 V |
| Threshold Voltage | 1.3V |
| Resistance | 6Ohm |
| Drain to Source Breakdown Voltage | 50V |
| Power Dissipation-Max | 360mW Ta |
| Height | 930μm |
| Vgs(th) (Max) @ Id | 1.5V @ 1mA |
| Supplier Device Package | SOT-23-3 |
| Base Part Number | BSS138 |
| Manufacturer's Part No. | BSS138 |
| Input Capacitance | 27pF |
| Rds On (Max) @ Id, Vgs | 3.5Ohm @ 220mA, 10V |
| Gate Charge (Qg) (Max) @ Vgs | 2.4nC @ 10V |
| Input Capacitance (Ciss) (Max) @ Vds | 27pF @ 25V |
| RoHS Status | ROHS3 Compliant |
| REACH SVHC | No SVHC |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Actions |
Cross-reference FAQ
Replacement Part Questions
Short answers for teams reviewing BSS138 replacement and equivalent-part options.
Does a mapped alternative mean a guaranteed drop-in replacement for BSS138?
Not automatically. Cross-reference mapping helps shortlist candidates, but package, electrical behavior, qualification scope, and approval rules still need to be checked before release.
Which parameters should teams compare first for BSS138 alternatives?
Start with package, series, key attributes, lifecycle status, stock position, datasheet access, and the mapped pin-to-pin or cross-reference note. Then confirm application-specific requirements in the datasheet and RFQ stage.
Can I request a quote for an alternative to BSS138?
Yes. Use the product links or RFQ actions on this page to request pricing, availability, documentation, and sourcing support for any listed alternative part.
Is BSS138 obsolete, and what replacement should buyers review first?
Check the lifecycle row on this page first. If buyers need a fast starting point, the strongest mapped replacement currently surfaced here is , followed by the other alternatives shown in the comparison table.
Engineering support
Need help validating the replacement path?
If your team is unsure whether a mapped alternative to BSS138 from ON Semiconductor is really usable, contact us for help on package fit, pin compatibility, key parameter gaps, and qualification-facing review questions.
Contact a hardware engineer
Email our engineering support contact at [email protected], or use the contact page if the question should be routed across sourcing, engineering, and support.
developer_board
Package and pin compatibility
Review whether the alternate path looks credible from package, footprint, and pin-level perspectives.
tune
Parameter and function gaps
Surface the electrical, interface, or application-fit questions that still need confirmation before approval.
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Qualification and approval prep
Organize the documentation, datasheet evidence, and validation checkpoints your internal team may still require.