SFM-149-02-LM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-149-02-LM-D-LC is a 98-position dual-row high-reliability SMT socket strip with 0.050" (1.27 mm) pitch and long-machined contacts for enhanced durability. Optimized for high-density mezzanine and board-to-board connections with 2 A per pin current capacity.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 98
- Lifecycle
- ACTIVE
- Datasheet
- SFM-149-02-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-149-02-LM-D-LC?
- 98-position dual-row 0.050" (1.27 mm) pitch SMT socket strip for maximum-density board-to-board interconnect in compact designs
- Long-machined (LC) contacts provide extended contact wipe length, rated for over 100 mating cycles for removable board assemblies
- 2 A per pin current rating with contact resistance below 30 mΩ supports both signal and moderate power distribution
- Compatible with SAMTEC SFM, TSM, and SSM mating header families at matching 1.27 mm pitch for flexible system integration
What is SFM-149-02-LM-D-LC used for?
The SFM-149-02-LM-D-LC is designed for dense mezzanine card and daughter board interconnect in servers, telecom line cards, and FPGA expansion modules where 98 signal connections must pass through a minimal PCB area. Its 0.050" pitch accommodates up to 49 differential signal pairs within a footprint that would fit fewer than 25 positions at standard 0.100" pitch. The long-machined contact design supports repeated module swapping without measurable degradation in contact resistance over the rated service life.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-149-02-LM-D-LC datasheet?
SFM-149-02-LM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-149-02-LM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many signal connections does the SFM-149-02-LM-D-LC provide and at what pitch?
The SFM-149-02-LM-D-LC provides 98 positions in a dual-row layout at a 0.050" (1.27 mm) pitch, yielding 49 contacts per row. This fine pitch allows the connector to carry 98 single-ended signals or 49 differential pairs across a board-to-board interface in a footprint roughly half the length of an equivalent 0.100" pitch connector, making it effective for high-channel-count FPGA and DSP interconnect designs.
What current rating and contact resistance can be expected from the SFM-149-02-LM-D-LC?
Each contact in the SFM-149-02-LM-D-LC is rated for 2 A continuous at 25°C ambient, with contact resistance specified below 30 mΩ per pin. For a 98-position connector carrying mixed signal and power, this means up to 196 A total current distribution across all pins, subject to thermal derating at elevated temperatures above 70°C in enclosed enclosures.
How does the SFM-149-02-LM-D-LC compare to a standard SFM-149 without the LC contact in terms of durability?
The LC designation specifies long-machined contacts with a greater contact wipe length during insertion compared to the standard shorter contacts. The longer wipe improves self-cleaning over the rated 100-cycle service life, maintaining contact resistance below 30 mΩ even after repeated insertions. In applications with monthly or quarterly module replacements, the LC variant typically outperforms standard contacts by delivering consistent electrical performance over a 3-to-5 year maintenance window.
Which SAMTEC header series mates with the SFM-149-02-LM-D-LC for board stacking?
The SFM-149-02-LM-D-LC mates with SAMTEC TSM-149 and SSM-149 header connectors that share the 0.050" (1.27 mm) pitch dual-row footprint. Stack heights can range from 1 mm to over 20 mm depending on the mating header's tail length, enabling designers to specify precise board-to-board separation for thermal management or mechanical clearance requirements in multi-board system assemblies.
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