SFM-129-L2-FM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-129-L2-FM-D-A-K is a 58-position dual-row high-reliability surface mount socket strip with 0.050 inch pitch and flush-mount SMT termination, designed for precise board-to-board mating in dense PCB assemblies.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 58
- Lifecycle
- ACTIVE
- Datasheet
- SFM-129-L2-FM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 58-position dual-row socket layout on 0.050 inch (1.27 mm) pitch enabling very high contact density for compact mezzanine and board stacking designs
- High-reliability socket strip construction engineered for consistent electrical contact across hundreds of mating cycles in demanding environments
- Flush-mount (FM) SMT termination style minimizes connector height, enabling low-profile board stack assemblies and efficient PCB real estate usage
Applications
The SFM-129-L2-FM-D-A-K is suited for high-density mezzanine interconnects in embedded computing, FPGA daughterboards, and RF front-end modules where 58 contacts must be reliably bridged at a 0.050 inch pitch. Its flush-mount SMT tails allow integration into single-reflow PCB assemblies without protruding pins, simplifying the manufacturing process. The high-reliability contact design supports repeated plug-and-play configurations in test fixtures, evaluation platforms, and field-serviceable industrial computing modules.
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 does the SFM-129-L2-FM-D-A-K's 0.050 inch pitch improve layout density versus 0.100 inch socket strips?
By using 0.050 inch (1.27 mm) pitch instead of the standard 0.100 inch, the SFM-129-L2-FM-D-A-K packs 58 contacts into approximately half the linear board space, freeing significant PCB area for routing or additional components in dense FPGA, DSP, and RF module designs.
What type of PCB assembly process does the SFM-129-L2-FM-D-A-K's flush-mount termination support?
The flush-mount (FM) surface mount termination is designed for reflow solder assembly, where pads sit flat against the PCB surface with no through-hole requirement. This eliminates drill holes, reduces board stack-up complexity, and supports both top-side and bottom-side placement in mixed SMT assemblies with solder paste print and reflow oven processing.
For which repeated-mate applications is the SFM-129-L2-FM-D-A-K's high-reliability rating most important?
High-reliability ratings are critical in test and measurement fixtures where the same connector mates and un-mates dozens of times during functional testing, as well as in field-replaceable compute modules that must retain low contact resistance below 20 mΩ across their full service life. The 58-position count also means any single unreliable contact can disrupt an entire data bus or power rail.
How does the dual-row configuration of the SFM-129-L2-FM-D-A-K affect the mating footprint compared to a single-row socket?
The dual-row arrangement places 29 contacts per row on 0.050 inch pitch, resulting in a body width that accommodates 2 rows within approximately 0.225 inches, versus a single-row strip that would require nearly twice the body length to carry the same 58-pin count. This makes the dual-row format preferable for square or near-square PCB connector zones.
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