SFM-139-L2-STL-D-A-K SAMTEC Connector (Other) In Stock
The SFM-139-L2-STL-D-A-K is a 78-position, dual-row, high-reliability socket strip from SAMTEC with a 0.050-inch (1.27 mm) pitch for surface mount PCB assembly. It features gold-plated contacts and a dual-row configuration providing 78 signal connections in a compact high-density footprint. Available with worldwide distribution for fast delivery in telecommunications, computing, and embedded systems applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-L2-STL-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-STL-D-A-K?
- 78-position dual-row layout at 0.050-inch (1.27 mm) pitch delivering high-density interconnect in half the board space of standard 0.100-inch pitch connectors
- High-reliability surface mount design with gold-plated contacts ensuring stable low-resistance connections through extended mating cycles
- Stacking and board-to-board configuration enabling modular mezzanine card assembly in space-constrained embedded and FPGA platforms
What is SFM-139-L2-STL-D-A-K used for?
The SFM-139-L2-STL-D-A-K is ideal for mezzanine card-to-carrier board interconnects in FPGA development platforms, embedded computing modules, and high-density test and measurement equipment. Its 0.050-inch pitch dual-row 78-position design supports reliable signal and power routing in telecommunications line cards, military electronics, and industrial control systems where board area is tightly constrained.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-139-L2-STL-D-A-K datasheet?
SFM-139-L2-STL-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-139-L2-STL-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What pitch and position count does the SFM-139-L2-STL-D-A-K provide and how does this compare to a 0.100-inch pitch alternative?
The SFM-139-L2-STL-D-A-K offers 78 positions at a 0.050-inch (1.27 mm) pitch in a dual-row surface mount package. Compared to a standard 0.100-inch (2.54 mm) pitch connector with the same 78 positions, this 1.27 mm pitch design occupies roughly half the PCB footprint length, enabling significantly higher connector density in space-constrained embedded computing and FPGA mezzanine board designs.
For which mezzanine board applications is the SFM-139-L2-STL-D-A-K a reliable interconnect choice?
The SFM-139-L2-STL-D-A-K is a reliable choice for FPGA mezzanine card interfaces, FMC (FPGA Mezzanine Card) board-to-carrier connections, and high-density embedded computing platforms that require 78 signal connections at 0.050-inch pitch. Its high-reliability surface mount gold-plated contacts support thousands of mating cycles, making it suitable for test fixtures and field-replaceable module systems as well.
How does the dual-row configuration of the SFM-139-L2-STL-D-A-K benefit high-speed signal routing compared to a single-row socket?
The dual-row configuration of the SFM-139-L2-STL-D-A-K places 78 positions across 2 rows at 0.050-inch (1.27 mm) pitch, which shortens the connector's overall length by approximately 50% compared to a single-row 78-position alternative at the same pitch. This shorter stub length reduces signal propagation skew between channels, benefiting high-speed differential signal pairs at multi-gigabit data rates in SERDES and PCIe interface applications.
Related Guides
STM32H753VIT6 High-Performance MCU Design Guide
Practical STM32H753VIT6 design guidance for power, clocks, memory, DMA, PCB layout, bring-up, and production recovery.
Aug 3, 2026
STM32H753ZIT6 Selection Guide for High-Performance Embedded Systems
Select the STM32H753ZIT6 by evaluating compute, memory, LQFP144 pinout, power, interfaces, security, and sourcing requirements.
Aug 3, 2026
ICL7660ACPAZ Negative Voltage Charge Pump Design Guide
Design a reliable ICL7660ACPAZ negative rail with capacitor equations, layout rules, startup checks, and practical troubleshooting.
Aug 2, 2026
C0402C103K3RACTU 10 nF MLCC Design Guide
Practical guidance for applying the C0402C103K3RACTU 10 nF, 25 V X7R MLCC in decoupling, filtering, timing, and EMI-control networks.
Aug 2, 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