SFM-139-L2-LM-D-A-K SAMTEC Connector (Other) In Stock
The SFM-139-L2-LM-D-A-K is a high-reliability dual-row socket strip from SAMTEC featuring 78 positions on a 0.050-inch (1.27 mm) pitch, designed for surface-mount assembly in demanding board-to-board interconnect applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-L2-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-139-L2-LM-D-A-K?
- 78-position dual-row layout on a compact 0.050-inch (1.27 mm) pitch for high-density board-to-board connections
- High-reliability surface-mount termination rated for demanding industrial and defense applications
- SAMTEC SFM series design provides low-insertion-force mating with compatible SFM header strips
What is SFM-139-L2-LM-D-A-K used for?
The SFM-139-L2-LM-D-A-K is used in high-density PCB mezzanine stacking applications where 78 signal or power contacts must be routed in a minimal footprint at 0.050-inch pitch. It suits defense electronics, high-speed data acquisition boards, and industrial backplane systems that require reliable surface-mount socket connectivity. The dual-row format maximizes pin count per unit length, making it a strong choice for FPGA daughter-card and modular instrument designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-139-L2-LM-D-A-K datasheet?
SFM-139-L2-LM-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-139-L2-LM-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the pin count and pitch of the SFM-139-L2-LM-D-A-K connector?
The SFM-139-L2-LM-D-A-K has 78 positions arranged in a dual-row configuration on a 0.050-inch (1.27 mm) pitch. This compact geometry supports high signal density per unit board area and is compatible with SAMTEC SFM-series mating headers.
In which assembly process can SFM-139-L2-LM-D-A-K be used, and what does that mean for PCB manufacturing?
The connector is surface-mount terminated, so it can be placed by automated pick-and-place equipment and reflowed in standard SMT ovens. This eliminates through-hole drilling, enabling denser multi-layer board layouts and reducing assembly cycle time for production volumes.
What applications benefit most from the 78-position dual-row SFM-139-L2-LM-D-A-K versus a lower pin-count alternative?
Applications needing more than 50 signal lines in a constrained board area—such as FPGA mezzanine cards, high-speed data acquisition modules, and defense electronics backplanes—benefit from the 78-pin dual-row SFM-139-L2-LM-D-A-K. Its 0.050-inch pitch packs 78 contacts into roughly 1.97 inches, avoiding larger connectors and saving significant PCB real estate.
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About SAMTEC
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