SFM-128-L2-STL-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-128-L2-STL-D-A-P-TR is a 56-position dual-row high-reliability surface mount socket strip with 0.050 inch (1.27 mm) pitch, straight leads, and tape-and-reel packaging for automated SMT production. Built for dense, high-reliability board-to-board connections. From $1.50 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-128-L2-STL-D-A-P-TR?
- 56-position dual-row 0.050 inch (1.27 mm) pitch SMT socket strip for high-density board-to-board signal routing
- Straight lead (STL) termination ensures coplanar solder joints across all 56 positions during reflow assembly
- Tape-and-reel (TR) packaging enables automated pick-and-place placement for high-volume production
- High-reliability design maintains consistent contact resistance over extended thermal and mechanical stress cycles
What is SFM-128-L2-STL-D-A-P-TR used for?
The SFM-128-L2-STL-D-A-P-TR is designed for mid-range density surface mount interfaces in communication subsystems, medical instrument modules, and embedded computing platforms requiring 56-pin SMT socket connectivity. Its straight lead profile and tape-and-reel packaging support precise, automated PCB assembly with reflow soldering. This connector suits mezzanine card sockets, sensor array boards, and compact FPGA daughter modules needing reliable 1.27 mm pitch SMT connectors.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-128-L2-STL-D-A-P-TR datasheet?
SFM-128-L2-STL-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-128-L2-STL-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the contact count and row configuration of the SFM-128-L2-STL-D-A-P-TR?
The SFM-128-L2-STL-D-A-P-TR provides 56 positions in a dual-row layout with 28 pins per row at a 0.050 inch (1.27 mm) pitch. This configuration enables 56 independent signal or power connections in a compact SMT footprint, making it suitable for mid-density data and control interfaces between stacked PCBs.
How does the L2 designation affect the mechanical design of the SFM-128-L2-STL-D-A-P-TR?
The L2 suffix in the SFM-128-L2-STL-D-A-P-TR designation typically refers to a specific lead length option within the SFM series, optimized for a defined PCB-to-board standoff height. This controlled lead length ensures the connector maintains the correct mating gap to the paired header, allowing engineers to precisely specify the board separation—often within a range of 1 mm to 3 mm—in stacked PCB assemblies.
For which mid-density embedded applications is SFM-128-L2-STL-D-A-P-TR preferred over 40-pin or 80-pin SFM variants?
The 56-pin SFM-128-L2-STL-D-A-P-TR is preferred when an interface requires more than a 40-pin connector can provide but does not need the full 80-pin capacity. Examples include 48-bit wide data buses with power and ground contacts, dual-channel sensor module interfaces, and multi-function FPGA I/O sockets where 56 positions at 1.27 mm pitch fits the PCB layout better than a longer 80-pin variant.
Is the SFM-128-L2-STL-D-A-P-TR suitable for medical device PCB assemblies with strict reliability requirements?
Yes, the high-reliability designation of the SFM-128-L2-STL-D-A-P-TR makes it appropriate for medical instrument and diagnostic equipment PCBs requiring consistent contact performance over thousands of mating cycles. The straight lead SMT termination supports controlled reflow soldering for repeatable solder joint quality, and the 1.27 mm pitch allows 56 signals to be reliably interconnected in the compact form factors typical of portable medical devices.
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