SFM-139-L2-FM-D-A SAMTEC Connector (Other) In Stock
The SFM-139-L2-FM-D-A is a 78-position dual-row surface-mount socket strip from Samtec with 0.050" (1.27 mm) pitch and high-reliability female contacts. It provides a compact SMT footprint for high-density board-to-board and module signal interfacing.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-L2-FM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row socket with 0.050" (1.27 mm) pitch for high-density signal routing in compact PCB designs
- Surface-mount termination style enables reflow soldering compatibility and eliminates through-hole drilling requirements
- High-reliability female contact system rated for repeated mating cycles, suitable for test, burn-in, and field-replaceable module applications
Applications
The SFM-139-L2-FM-D-A is used in high-density PCB assemblies for communications, computing, and instrumentation equipment where 78 signal lines must interface within a 1.27 mm pitch footprint. Its dual-row SMT design suits daughter card sockets, FPGA module carriers, and backplane socket applications. The female contact configuration accommodates mating male strip headers, enabling repeatable plug-in module replacement in production or field environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many positions and rows does the SFM-139-L2-FM-D-A provide, and what is its pitch?
The SFM-139-L2-FM-D-A features 78 positions arranged in a dual-row configuration with a 0.050" (1.27 mm) pitch. This compact layout accommodates high signal density on surface-mount PCBs without requiring through-hole vias, saving board area in dense designs.
What PCB assembly process is compatible with the SFM-139-L2-FM-D-A?
The SFM-139-L2-FM-D-A uses surface-mount termination, making it fully compatible with standard reflow soldering processes up to 260°C peak. No through-hole drilling is needed, and the 1.27 mm pitch footprint can be placed by automated pick-and-place equipment during high-volume production runs.
Which mating headers mate with the SFM-139-L2-FM-D-A socket strip?
The SFM-139-L2-FM-D-A mates with Samtec TSM and SSM series male header strips sharing the 0.050" (1.27 mm) dual-row footprint. Using matched Samtec male headers ensures rated contact normal force and consistent engagement depth across all 78 positions, maintaining signal integrity in high-cycle applications.
What applications benefit from the SFM-139-L2-FM-D-A high-reliability socket design?
High-reliability designs in test and measurement systems, FPGA evaluation boards, and industrial control module carriers benefit from the SFM-139-L2-FM-D-A. Its 78-pin dual-row 1.27 mm pitch socket allows repeated module insertion and removal cycles while maintaining low contact resistance, which is essential for burn-in fixtures and field-replaceable I/O modules.
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