SFM-123-L2-S-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-123-L2-S-D-A-P-TR is a 46-position dual-row high-reliability SMT socket strip with 0.050-inch (1.27 mm) pitch and a level-2 low-profile mated height for compact mezzanine board stacking. Single-beam contacts with anti-wicking solder pin termination support reliable SMT assembly. Available on tape-and-reel with worldwide distribution.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-L2-S-D-A-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-123-L2-S-D-A-P-TR?
- 46-position dual-row SMT socket at 0.050 inch (1.27 mm) pitch providing 23 contacts per row for high-density board-to-board signal and power routing
- Level-2 low-profile mated height (-L2) specifically targeting slim stacking clearances between 2 mm and 3 mm for thin embedded module designs
- High-reliability SFM socket contact design with anti-wicking termination ensuring solder flux does not wick into the contact zone during reflow
- Single-beam (-S) contact variant offering cost-effective reliable interconnect for applications with moderate mating cycle requirements
What is SFM-123-L2-S-D-A-P-TR used for?
The SFM-123-L2-S-D-A-P-TR is designed for high-density mezzanine PCB stacking in slim embedded modules, SOM-to-baseboard interconnect, and compact data acquisition systems where 46 signal and power connections must fit within a 30 mm connector footprint at 0.050-inch pitch. Its level-2 low-profile mated height makes it ideal for wearable electronics, drone flight controllers, and slim industrial handheld devices where total PCB stack height is a critical design constraint. The anti-wicking solder termination supports reliable automated reflow assembly in lead-free manufacturing environments.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-123-L2-S-D-A-P-TR datasheet?
SFM-123-L2-S-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-123-L2-S-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the L2 designation in SFM-123-L2-S-D-A-P-TR specify for mated board-to-board stack height?
The L2 designation indicates a Level 2 low-profile mated height, which in the SAMTEC SFM series targets a board-to-board clearance of approximately 2 mm to 3 mm between the two mated PCB surfaces. This is lower than a standard-profile variant at 4 mm to 6 mm and a high-profile variant at 8 mm or more, making the L2 version the correct choice for slim embedded modules, wearable device PCB stacks, and miniature industrial sensors where every millimeter of vertical height impacts the enclosure design.
For a 46-signal SOM-to-baseboard interface, how does the SFM-123 at 0.050 inch pitch compare to a 0.100 inch alternative for footprint size?
At 0.050 inch (1.27 mm) pitch, the SFM-123-L2-S-D-A-P-TR fits 46 positions into a dual-row footprint approximately 30 mm long. An equivalent 0.100 inch pitch connector for the same 46 positions would require roughly 60 mm of board length, consuming twice the PCB edge space. For a compact SOM module where PCB area is at a premium, the 0.050 inch pitch halves the connector footprint, freeing approximately 30 mm of PCB edge for additional I/O connectors, capacitors, or test pads.
What does the anti-wicking termination of the SFM-123-L2-S-D-A-P-TR protect against during SMT reflow assembly?
Anti-wicking solder pin termination prevents molten solder or flux from traveling up the contact pin and into the electrical contact zone during reflow soldering at peak temperatures of 260°C. If flux or solder wicks into the contact area, it can solidify and increase contact resistance above the 30 milliohm threshold, or block the contact spring from deflecting properly during mating, causing intermittent connections. The anti-wicking design is especially important for fine-pitch connectors like the 0.050 inch SFM-123, where capillary action forces are stronger due to the narrower pin-to-pin gaps.
How many mating cycles is the SFM-123-L2-S-D-A-P-TR rated for and which applications approach that limit in practice?
SAMTEC's SFM-series high-reliability socket strips are rated for a minimum of 200 mating cycles while maintaining contact resistance below 30 milliohms. In practice, consumer SOM module applications where a board is inserted once during assembly rarely approach this limit, while test fixtures or field-serviceable industrial modules that are swapped monthly over a 10-year life can accumulate 120 cycles. The 200-cycle rating provides comfortable margin for most applications, but engineers expecting more than 150 lifetime insertions should confirm the specific SFM-123 single-beam rating with SAMTEC's application team.
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