SFM-143-L2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-L2-STL-D-A-K is an 86-position dual-row high-reliability socket strip on a 1.27 mm / 0.050" pitch, designed for surface-mount assembly. It features gold-plated contacts with staking hardware for mechanical retention and board-to-board stacking. From $8.50 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-L2-STL-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 86 dual-row positions (2×43) on a 1.27 mm / 0.050" pitch, enabling high-density board-to-board signal connections in space-constrained designs
- High-reliability socket construction with staking posts (STL) for mechanical retention during shock and vibration in harsh environments
- Gold-plated contacts and SMT footprint allow reflow-compatible assembly without through-hole drilling, reducing board fabrication cost
Applications
The SFM-143-L2-STL-D-A-K is designed for high-density board-to-board stacking applications such as FPGA mezzanine cards, rugged military communication modules, and industrial compute-on-module assemblies where 86 signals must be routed reliably across a 1.27 mm pitch interface. Its staking hardware provides the mechanical strength needed to survive vibration and shock environments found in aerospace and defense systems.
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
What pitch does the SFM-143-L2-STL-D-A-K use and how many positions does it provide?
The SFM-143-L2-STL-D-A-K operates on a 1.27 mm / 0.050" pitch and provides 86 positions arranged in 2 rows of 43. This fine pitch enables very high signal density for board-to-board stacking while remaining compatible with standard SMT reflow processes used in high-volume PCB manufacturing.
What does the STL designation mean and why is it important for harsh-environment applications?
The STL designation indicates staking post hardware that anchors the socket mechanically to the PCB, preventing connector pull-out under vibration, shock, or lateral forces. This retention feature is critical in defense, aerospace, and industrial equipment where board assemblies experience g-force levels above 10 g and must maintain signal integrity across 86 contacts.
How does SFM-143-L2-STL-D-A-K compare to a through-hole socket strip for a compact mezzanine design?
As a surface-mount socket, SFM-143-L2-STL-D-A-K eliminates the need for 86 drilled holes, reducing PCB layer impedance discontinuities and shortening assembly cycle time. The 1.27 mm pitch also cuts the connector footprint by roughly half compared to a 2.54 mm through-hole equivalent, freeing significant board real estate for signal routing in compact mezzanine layouts.
Which board-to-board stacking heights are achievable with this SAMTEC SFM series socket?
The SFM series is designed to mate with SAMTEC's TSM and SSM dual-row header families, with stacking heights typically ranging from 3 mm to 20 mm depending on the complementary header post length. The L2 designation indicates a specific mated height profile, enabling system designers to select the exact board separation needed for component clearance in multi-board stack assemblies.
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