SFM-139-T2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-139-T2-STL-D-A-K is a 78-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch for high-density surface-mount board-to-board interconnects. Gold-plated contacts are rated at 1 A per pin and operate reliably from -55°C to +125°C for industrial and harsh environments. Available with worldwide in-stock distribution for fast prototyping and production delivery.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-T2-STL-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row layout on 0.050" (1.27 mm) pitch accommodating wide data buses and power rails in a single compact SMT connector
- Gold-plated contacts with 1 A per pin rating delivering low-resistance connections across all 78 positions
- Extended operating temperature range from -55°C to +125°C for reliable performance in harsh industrial and outdoor environments
- Surface-mount design compatible with standard reflow soldering and automated PCB assembly processes
Applications
The SFM-139-T2-STL-D-A-K is used in high pin-count board-to-board mezzanine interconnects for FPGA development kits, industrial computing modules, and embedded vision systems requiring 78 or more simultaneous signal paths. Its 0.050" pitch allows wide parallel bus interfaces and mixed power-signal routing on a compact SMT footprint. This connector is also well suited for test and measurement backplane assemblies where reliable repeated mating over thousands of cycles is critical.
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 pin count and pitch does the SFM-139-T2-STL-D-A-K offer for high-density interconnects?
The SFM-139-T2-STL-D-A-K provides 78 total positions in a dual-row layout with 39 pins per row on a 0.050" (1.27 mm) pitch. This high pin-count density allows routing of 16-bit or 32-bit data buses, multiple power rails, and control signals through a single connector spanning approximately 50 mm of board length.
Which thermal environments can the SFM-139-T2-STL-D-A-K reliably operate in?
This connector is rated for an operating temperature range of -55°C to +125°C, covering standard commercial, industrial, and extended temperature profiles. The gold-plated contacts maintain contact resistance below typical failure thresholds across the full 180°C thermal span, making it suitable for outdoor telecommunications enclosures, automotive electronics, and military-grade board assemblies.
How does the 78-position SFM-139-T2-STL-D-A-K compare to lower pin-count alternatives when designing wide data bus interfaces?
For designs requiring 64-bit data plus address and control lines totaling 78 or more signals, the SFM-139-T2-STL-D-A-K consolidates all connections into a single connector rather than requiring two or more smaller connectors in parallel. This reduces board routing complexity, eliminates inter-connector skew, and saves PCB real estate compared to using two 40-pin connectors with 1 A per pin current capacity each.
For which embedded computing or FPGA board applications is the SFM-139-T2-STL-D-A-K most commonly specified?
System designers commonly specify this 78-pin socket strip for FPGA evaluation board mezzanine connectors, high-speed camera interface modules, industrial Ethernet daughterboards, and multi-channel analog acquisition cards. The dual-row 1.27 mm pitch footprint and 1 A per pin rating balance signal density with power handling, supporting both LVDS data streams and moderate current power distribution across the 78 positions.
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