SFM-139-L2-LM-D-A-K SAMTEC Connector (Other) In Stock
The SFM-139-L2-LM-D-A-K is a high-reliability dual-row socket strip from SAMTEC featuring 78 positions on a 0.050-inch (1.27 mm) pitch, designed for surface-mount assembly in demanding board-to-board interconnect applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-L2-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-139-L2-LM-D-A-K?
- 78-position dual-row layout on a compact 0.050-inch (1.27 mm) pitch for high-density board-to-board connections
- High-reliability surface-mount termination rated for demanding industrial and defense applications
- SAMTEC SFM series design provides low-insertion-force mating with compatible SFM header strips
What is SFM-139-L2-LM-D-A-K used for?
The SFM-139-L2-LM-D-A-K is used in high-density PCB mezzanine stacking applications where 78 signal or power contacts must be routed in a minimal footprint at 0.050-inch pitch. It suits defense electronics, high-speed data acquisition boards, and industrial backplane systems that require reliable surface-mount socket connectivity. The dual-row format maximizes pin count per unit length, making it a strong choice for FPGA daughter-card and modular instrument designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-139-L2-LM-D-A-K datasheet?
SFM-139-L2-LM-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-139-L2-LM-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the pin count and pitch of the SFM-139-L2-LM-D-A-K connector?
The SFM-139-L2-LM-D-A-K has 78 positions arranged in a dual-row configuration on a 0.050-inch (1.27 mm) pitch. This compact geometry supports high signal density per unit board area and is compatible with SAMTEC SFM-series mating headers.
In which assembly process can SFM-139-L2-LM-D-A-K be used, and what does that mean for PCB manufacturing?
The connector is surface-mount terminated, so it can be placed by automated pick-and-place equipment and reflowed in standard SMT ovens. This eliminates through-hole drilling, enabling denser multi-layer board layouts and reducing assembly cycle time for production volumes.
What applications benefit most from the 78-position dual-row SFM-139-L2-LM-D-A-K versus a lower pin-count alternative?
Applications needing more than 50 signal lines in a constrained board area—such as FPGA mezzanine cards, high-speed data acquisition modules, and defense electronics backplanes—benefit from the 78-pin dual-row SFM-139-L2-LM-D-A-K. Its 0.050-inch pitch packs 78 contacts into roughly 1.97 inches, avoiding larger connectors and saving significant PCB real estate.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”
You May Also Like
10214-6212PC
3M
Connector
1778573
Phoenix Contact
Connector
5227222-3
TE Connectivity
Connector
S4B-XH-SM4-TB(LF)(SN)
JST (JAPAN SOLDERLESS TERMINALS)
Connector
185226-2
TE Connectivity
Connector
0533980571
Molex
Connector
0360-0-15-01-34-27-10-0
Mill-Max
Connector
7850-0006PR
3M
Connector
AVB 1,5/2/12
BLOCK
Connector
N3764-5002RB
3M
Connector
N3627-6002RB
3M
Connector
N3627-5002RB
3M
Connector
N3440-6002RB
3M
Connector
929715-03-36-I
3M
Connector
929667-02-36-I
3M
Connector
929665-04-36-I
3M
Connector
929665-02-36-I
3M
Connector
929647-04-36-I
3M
Connector
929647-03-36-I
3M
Connector
7834-0006PR
3M
Connector
7826-0006PR
3M
Connector
7820-0006PR
3M
Connector
3440-5002
3M
Connector
3433-5302
3M
Connector