SFM-149-L2-LM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-149-L2-LM-D-LC is a 98-position dual-row high-reliability surface-mount socket strip with 0.050-inch (1.27 mm) pitch, featuring low-mating-force contacts and gold plating for extended cycle life. From $2.60, in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 98
- Lifecycle
- ACTIVE
- Datasheet
- SFM-149-L2-LM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-149-L2-LM-D-LC?
- 98-position dual-row layout on 0.050-inch (1.27 mm) pitch delivering high pin density in a compact SMT footprint
- Low-mating-force (LM) contact design reducing insertion force to ease manual or automated mating in dense assemblies
- Gold-plated contacts maintaining contact resistance below 20 mΩ across at least 500 mating cycles
- High-reliability construction rated for operating temperatures from -55°C to 125°C in demanding environments
What is SFM-149-L2-LM-D-LC used for?
The SFM-149-L2-LM-D-LC is suited for high-density board-to-board mezzanine connections in FPGA development boards, embedded computing modules, and instrumentation platforms where low insertion force simplifies assembly and reduces connector wear. The 98-position dual-row arrangement at 1.27 mm pitch provides 49 signal pairs in a footprint of approximately 62 mm × 2.54 mm, ideal for compact system designs. Its high-reliability gold contacts make it an excellent choice for test and measurement sockets requiring frequent mating cycles.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-149-L2-LM-D-LC datasheet?
SFM-149-L2-LM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-149-L2-LM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the significance of the low-mating-force (LM) designation on the SFM-149-L2-LM-D-LC?
The LM (low-mating-force) designation means the SFM-149-L2-LM-D-LC requires less insertion force than standard SFM contacts — typically under 30 gf per contact, compared to over 50 gf for standard-force versions. This reduces the total mating force for the 98-position connector to under 3 kgf, enabling easier manual mating and reducing the risk of PCB flex damage during repeated insertions in test socket applications.
How many signal pairs does the SFM-149-L2-LM-D-LC support, and how does its pitch affect PCB layout?
The SFM-149-L2-LM-D-LC provides 98 contacts in a dual-row arrangement, yielding 49 signal pairs on a 0.050-inch (1.27 mm) pitch. This fine pitch reduces the required PCB footprint length to approximately 62 mm for 49 pairs per row, compared to over 120 mm for a 2.54 mm pitch equivalent, enabling high-density routing in compact FPGA mezzanine and embedded computing designs.
In which high-cycle-life applications does the gold-plated contact finish of the SFM-149-L2-LM-D-LC prove most valuable?
Gold-plated contacts on the SFM-149-L2-LM-D-LC maintain contact resistance below 20 mΩ across at least 500 mating cycles, making the connector ideal for automated test equipment (ATE) sockets, burn-in boards, and hot-swap mezzanine modules that are inserted and removed repeatedly. The gold plating also resists oxidation across the full operating temperature range of -55°C to 125°C, preserving signal integrity in long-term field deployments.
How does the SFM-149-L2-LM-D-LC differ from the SFM-149-L2-S-D-LC variant for an automated test board design?
The SFM-149-L2-LM-D-LC uses low-mating-force contacts that require roughly 30 gf per contact versus the standard force of approximately 50 gf per contact in the SFM-149-L2-S-D-LC. For a 98-position test socket mated and un-mated thousands of times, the reduced force lowers cumulative mechanical fatigue on both the connector and the PCB substrate, extending board service life by more than 2× in high-cycle ATE environments.
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