SFM-129-L2-S-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-129-L2-S-D-A-P-TR is a 58-position dual-row high-reliability surface mount socket strip at 0.050 inch pitch with gold-plated contacts and polarization features. Designed for compact mezzanine interconnects. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 58
- Lifecycle
- ACTIVE
- Datasheet
- SFM-129-L2-S-D-A-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-129-L2-S-D-A-P-TR?
- 58-position dual-row socket strip at 0.050 inch (1.27 mm) pitch delivering high-density SMT board-to-board connectivity
- Gold-plated (A) contacts with P (polarization) keying to prevent mismatch during mating on high-cycle reliability applications
- L2 contact length and tape-and-reel (TR) format supporting automated assembly and consistent stack height control in production
What is SFM-129-L2-S-D-A-P-TR used for?
The SFM-129-L2-S-D-A-P-TR is used in FPGA expansion cards, compact embedded processor modules, and industrial I/O daughterboards where 58-position dual-row socket connectivity at 0.050 inch pitch is required. The polarization feature and gold contacts make it well-suited for high-reliability telecom and defense applications demanding assured mating orientation and low contact resistance over thousands of mating cycles.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-129-L2-S-D-A-P-TR datasheet?
SFM-129-L2-S-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-129-L2-S-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the L2 contact length in the SFM-129-L2-S-D-A-P-TR affect stack height in a board-to-board assembly?
The L2 designation specifies a longer contact tail than the standard L1, allowing the SFM-129-L2-S-D-A-P-TR to accommodate board-to-board stack heights greater than the default, typically supporting separations of 8 mm or more between mated PCBs. This is advantageous in mezzanine assemblies where components on the lower board protrude above the surface and need clearance within the 0.050 inch pitch connector stack.
What role does the P (polarization) option play in preventing misconnection on the SFM-129-L2-S-D-A-P-TR?
The P option adds a physical polarization key to the 58-position dual-row connector body, ensuring it can only mate with the correct corresponding header in one orientation. This is critical in dual-row connectors at 0.050 inch pitch where accidental 180-degree misplacement across 58 positions could damage all connected signals and prevent board-level shorts during assembly or field maintenance.
When is the SFM-129-L2-S-D-A-P-TR a better choice than a lower pin-count SAMTEC SFM connector for embedded computing boards?
The 58-position count is optimal when an embedded system requires simultaneous transfer of a 32-bit data bus, multiple control signals, and several power pins without splitting connectivity across two smaller connectors. Using SFM-129-L2-S-D-A-P-TR at 0.050 inch pitch consolidates all 58 signals in a single SMT footprint, reducing PCB routing complexity and board area compared to using two 30-position connectors.
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About SAMTEC
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