SFM-139-02-LM-D-A SAMTEC Connector (Other) In Stock
SAMTEC SFM-139-02-LM-D-A is a 78-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch for surface mount applications. Gold-plated contacts deliver low insertion loss and long-term reliability. Available from global distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-02-LM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78 dual-row positions at 0.050" (1.27 mm) pitch enabling very high-density signal routing on compact PCBs
- Surface mount termination with gold-plated contacts for reliable, low-loss signal integrity
- High-reliability construction suitable for demanding industrial and communications applications
Applications
The SFM-139-02-LM-D-A is suited for high-density board-to-board mezzanine interconnects in networking, computing, and industrial automation equipment. Its 78-position dual-row 0.050" pitch surface mount design accommodates numerous parallel signal lines in a small footprint. Engineers use this connector in FPGA evaluation boards, test equipment backplanes, and high-speed data acquisition 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 position count and pitch does the SFM-139-02-LM-D-A provide?
The SFM-139-02-LM-D-A provides 78 total positions arranged in a dual-row layout at 0.050" (1.27 mm) pitch, making it one of SAMTEC's high-density socket strips capable of routing many signal lines in minimal PCB area.
In which board-to-board scenarios does the SFM-139-02-LM-D-A outperform lower-density connectors?
For mezzanine card designs that need to route 39 or more differential pairs or parallel bus signals, the 78-position, 0.050" pitch dual-row layout reduces connector footprint by roughly half compared to 0.100" pitch alternatives, saving valuable PCB real estate in telecom or FPGA applications.
When is SFM-139-02-LM-D-A a good alternative to the SFM-138-L2-SM-D-A?
When a design requires 78 positions instead of 76, the SFM-139-02-LM-D-A is the direct upgrade while retaining the same 0.050" pitch dual-row surface mount footprint. The 2 additional pins can carry extra power or ground rails, improving signal integrity margins in high-speed PCB layouts.
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