SFM-123-L2-LM-D-A-K-TR SAMTEC Connector (Other) In Stock
The SFM-123-L2-LM-D-A-K-TR is a 46-position dual-row high-reliability socket strip from SAMTEC with a 0.050-inch (1.27 mm) pitch, designed for surface mount board-to-board interconnects. Gold-plated contacts and low-profile LM mounting height ensure stable, low-resistance connections in compact mezzanine card assemblies. Supplied in tape-and-reel format for automated SMT production with global availability.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-L2-LM-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 46-position dual-row layout on 0.050-inch (1.27 mm) pitch provides high signal density for mezzanine and daughter-card interconnects in a compact surface mount footprint
- LM (low-mount) height variant minimizes board-to-board stack height, enabling slim form-factor designs in portable instruments and embedded computing modules
- Tape-and-reel (TR) packaging supports automated pick-and-place assembly at production volumes, reducing handling time and placement error on SMT lines
Applications
The SFM-123-L2-LM-D-A-K-TR is used in board-to-board and mezzanine interconnect applications in industrial computing, embedded systems, and telecommunications equipment where a high pin count is needed in a small 0.050-inch pitch envelope. Its 46-pin dual-row format allows routing of both power and high-speed signal lines in a single connector, simplifying layout on constrained PCBs. The surface mount termination integrates seamlessly into standard SMT reflow processes used in high-volume electronics manufacturing.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the contact pitch and pin count of the SFM-123-L2-LM-D-A-K-TR and how does the dual-row layout help PCB layout?
The SFM-123-L2-LM-D-A-K-TR has a 0.050-inch (1.27 mm) pitch with 46 total contacts arranged in 2 rows of 23. The dual-row format reduces connector body length to approximately 29 mm compared to a single-row 46-pin connector that would span nearly 58 mm, freeing critical PCB real estate for other components in space-constrained board designs.
What does the LM designation mean for the SFM-123-L2-LM-D-A-K-TR and what board clearance does it provide?
The LM designation indicates a low-mount above-board height of approximately 2 mm for the socket body, reducing the total mated stack height between two boards to less than 6 mm when combined with a standard matching plug strip. This low-profile mating height is critical in slim embedded modules and ruggedized portable devices where internal vertical clearance is limited to under 10 mm.
What current does each contact pin of the SFM-123-L2-LM-D-A-K-TR support?
SAMTEC SFM series contacts are rated at 1 A per pin at 30 V AC/DC, allowing designers to parallel multiple pins for power rails requiring higher current. For a 5 V power rail needing 5 A, five adjacent pins can be tied together, leaving the remaining 41 signal contacts available for high-speed differential pairs, single-ended I/O, and ground return paths within the 46-pin connector body.
Which SAMTEC plug connector mates with the SFM-123-L2-LM-D-A-K-TR and how does the gold plating benefit signal integrity?
The SFM-123-L2-LM-D-A-K-TR mates with SAMTEC TSM and SFH series plug strips using the same 0.050-inch pitch dual-row pattern. The gold-plated contacts, typically with 30 µin gold over nickel, maintain contact resistance below 20 milliohms and support hundreds of mating cycles without oxidation, preserving signal integrity for high-speed interfaces up to several Gbps on the 46 signal lines.
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