SFM-123-02-LM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-123-02-LM-D-LC is a 46-position dual-row high-reliability SMT socket strip with 1.27 mm (0.050 inch) pitch, gold-over-nickel (LM) contacts, and a low-clearance profile. Rated at 1.0 A per pin and 105°C. Available from global stock worldwide.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-02-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-123-02-LM-D-LC?
- 46-position dual-row SMT socket strip with 1.27 mm (0.050") pitch delivering 23 signal pairs in a compact footprint
- Gold-over-nickel (LM) contacts providing low contact resistance and extended mating cycle life
- Low-clearance (LC) design minimizing board-to-board stack height for space-constrained assemblies
- High-reliability construction rated to 105°C suitable for aerospace, defense, and industrial applications
What is SFM-123-02-LM-D-LC used for?
The SFM-123-02-LM-D-LC is designed for aerospace electronics, ruggedized defense systems, and industrial modules where fine-pitch 1.27 mm dual-row SMT socket connectors with gold-over-nickel contacts and minimal installed height are required. Its 46-position layout provides 23 signal pairs for dense mezzanine board and daughter-card interfaces. The low-clearance profile supports tightly stacked multi-board assemblies in height-constrained enclosures.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-123-02-LM-D-LC datasheet?
SFM-123-02-LM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-123-02-LM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the LM contact finish mean in SFM-123-02-LM-D-LC and why is it specified for high-reliability designs?
LM indicates gold-over-nickel contact plating in the SFM-123-02-LM-D-LC. The nickel underlayer provides a barrier against base metal diffusion while the gold overplating delivers low contact resistance and resistance to oxidation across all 46 positions. This contact system supports extended mating cycle life and reliable electrical performance at operating temperatures up to 105°C, meeting the stringent qualification requirements of aerospace, defense, and medical electronic interconnect applications.
How does the low-clearance (LC) profile of SFM-123-02-LM-D-LC reduce stack height in mezzanine assemblies?
The LC designation specifies a reduced installed height for the SFM-123-02-LM-D-LC, which directly limits the gap between stacked PCBs when used as a mezzanine connector. For avionics line-replaceable units and compact military embedded systems, minimizing board-to-board clearance is a critical mechanical constraint. The 46-position 1.27 mm pitch dual-row SMT layout maintains 23 signal pairs within this reduced height form factor, enabling denser multi-board packaging without sacrificing pin count.
For a 46-signal interface design, when is SFM-123-02-LM-D-LC chosen over a 2.54 mm pitch socket connector?
SFM-123-02-LM-D-LC uses a 1.27 mm (0.050 inch) pitch, which occupies approximately half the board length of a 2.54 mm pitch connector at the same 46-pin count. When PCB area is at a premium in aerospace avionics bays, ruggedized handhelds, or compact industrial controllers, the finer pitch reduces footprint area significantly. The LM gold-over-nickel contacts and high-reliability rating further differentiate the SFM-123 from standard 2.54 mm alternatives in qualification-sensitive applications.
What are the current and temperature ratings of SFM-123-02-LM-D-LC for mixed signal and power applications?
Each of the 46 positions in the SFM-123-02-LM-D-LC supports 1.0 A continuous current with an operating temperature limit of 105°C. Gold-over-nickel contacts maintain stable contact resistance at rated current levels, making the connector suitable for combined signal and low-power bus line applications. These ratings allow designers to route both logic-level signals and auxiliary supply rails through the same 46-position connector on aerospace or industrial mezzanine boards without derating concerns in elevated-temperature environments.
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