SFM-128-L2-SM-D-A SAMTEC Connector (Other) In Stock
SAMTEC SFM-128-L2-SM-D-A is a 56-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch for surface mount PCB assembly. Gold-plated contacts provide low-resistance mating and long service life. Available from authorized distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- SFM-128-L2-SM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 56 dual-row positions at 0.050" (1.27 mm) pitch for compact high-density board-to-board signal routing
- Surface mount termination with gold-plated contacts ensuring reliable low-resistance electrical connections
- High-reliability SAMTEC construction suitable for demanding aerospace, defense, and industrial interconnect applications
Applications
The SFM-128-L2-SM-D-A is ideal for high-density mezzanine and board-to-board interconnects in embedded computing, FPGA development platforms, and industrial control systems. Its 56-position 0.050" pitch dual-row layout supports routing 28 differential pairs or parallel bus signals in a minimal SMT footprint. Test and measurement instruments, data acquisition modules, and communication backplanes all use this socket strip for reliable multi-signal interconnection.
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 does the SFM-128-L2-SM-D-A provide, and what is its pitch?
The SFM-128-L2-SM-D-A provides 56 total positions in a dual-row configuration at 0.050" (1.27 mm) pitch. This enables routing of up to 28 differential signal pairs or 56 single-ended signals in a compact SMT footprint, ideal for high-density FPGA and processor board interconnects.
For which PCB assembly processes is the SFM-128-L2-SM-D-A optimized, and what tolerances should the PCB land pattern meet?
The SFM-128-L2-SM-D-A is designed for standard SMT reflow soldering. SAMTEC recommends a PCB land pattern with 0.050" (1.27 mm) pad pitch and pad dimensions per the product drawing to ensure self-centering during reflow. Paste stencil thickness of 0.15 mm (6 mil) suits the fine-pitch 0.050" spacing of this 56-position connector.
When is SFM-128-L2-SM-D-A the right choice compared to higher-count SFM series connectors?
The SFM-128-L2-SM-D-A is the right choice when a design requires exactly 56 signal paths — routing a 32-bit data bus plus 24 control lines, for example — without the excess pins of a 76- or 78-position variant. Fewer positions mean a shorter connector body, reducing PCB edge-to-connector clearance requirements and lowering material cost per board assembly.
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