SFM-139-L2-FM-D-A-K-TR SAMTEC Connector (Other) In Stock
The SAMTEC SFM-139-L2-FM-D-A-K-TR is a 78-position dual-row high-reliability surface-mount socket strip with 0.050" (1.27 mm) pitch. It features gold-plated contacts engineered for high cycle counts in board-to-board and mezzanine interconnect applications. Available on tape and reel from stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-L2-FM-D-A-K-TR 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-FM-D-A-K-TR?
- 78-position dual-row layout provides high-density signal routing in a compact 0.050" (1.27 mm) pitch footprint
- Tape-and-reel packaging enables high-volume automated SMT pick-and-place assembly
- High-reliability gold-plated contacts maintain low contact resistance across many mating cycles in demanding environments
What is SFM-139-L2-FM-D-A-K-TR used for?
The SFM-139-L2-FM-D-A-K-TR is used in high-density board-to-board and mezzanine connector applications in telecommunications, military, and aerospace electronics. Its 0.050" pitch dual-row layout accommodates 78 connections in a minimal PCB footprint, ideal for backplane and daughtercard interfaces where signal count is high. The tape-and-reel format supports efficient automated SMT placement in high-volume production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-139-L2-FM-D-A-K-TR datasheet?
SFM-139-L2-FM-D-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-139-L2-FM-D-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 0.050" pitch of the SFM-139-L2-FM-D-A-K-TR benefit compact mezzanine board designs compared to standard connectors?
The SFM-139-L2-FM-D-A-K-TR uses 0.050" (1.27 mm) pitch, half that of standard 0.100" (2.54 mm) headers, fitting 78 positions in roughly the same PCB length as a 39-position standard-pitch connector. This high density suits military electronics, aerospace daughtercards, and telecommunications line cards where signal count is high and board real estate is limited.
What does the TR suffix on SFM-139-L2-FM-D-A-K-TR indicate about ordering and assembly compatibility?
The TR suffix denotes tape-and-reel packaging, meaning the SFM-139-L2-FM-D-A-K-TR is delivered on a continuous reel for automated SMT pick-and-place assembly. This eliminates manual connector placement for 78-position dual-row surface-mount strips, reducing assembly cycle time and improving placement accuracy in high-volume PCB production lines.
Which SAMTEC mating connector series pairs with the SFM-139-L2-FM-D-A-K-TR to create a complete board-to-board interface?
The SFM-139-L2-FM-D-A-K-TR socket strip mates with SAMTEC's SFH-series male headers at 0.050" pitch, forming a 78-position dual-row board-to-board interconnect. Together they support mezzanine stack-up configurations at defined mated heights, making them suitable for high-cycle daughtercard and backplane connections carrying multiple high-speed signal channels.
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