SFM-124-L2-S-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-124-L2-S-D-A-K is a 48-position, 0.050" (1.27 mm) pitch dual-row high-reliability surface mount socket strip. Gold-plated contacts support up to 1A per pin and 150V AC. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 48
- Lifecycle
- ACTIVE
- Datasheet
- SFM-124-L2-S-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 48 positions at 0.050" (1.27 mm) pitch in dual-row configuration maximizing contact density in minimal PCB area
- High-reliability gold-plated contacts rated 150V AC and 1A per pin ensure consistent low-resistance mating across thousands of cycles
- Surface mount (SMT) design compatible with standard reflow soldering at 260°C peak for high-volume automated assembly
- L2 tail length option provides additional solder joint clearance for improved soldering reliability on fine-pitch layouts
Applications
SFM-124-L2-S-D-A-K is ideal for high-density board-to-board interconnects in compact embedded systems, FPGA mezzanine cards, and test and measurement equipment requiring 48 signals in a 1.27 mm pitch footprint. Its fine 0.050" pitch enables designers to route high channel-count interfaces such as memory buses and I/O expansion on space-constrained PCBs. The socket-strip design allows socketed daughter card or module installations where field replaceability or re-programming of sub-assemblies is required.
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 pitch and contact count does the SFM-124-L2-S-D-A-K provide, and how does this compare to 0.100" pitch connectors?
The SFM-124-L2-S-D-A-K provides 48 contacts at 0.050" (1.27 mm) pitch in a dual-row arrangement, occupying roughly half the board length of an equivalent 0.100" pitch connector. This high density is critical for FPGA I/O headers, memory interface sockets, and RF module installations where PCB real estate below 25 mm is a hard constraint.
What are the current and voltage ratings per pin for the SFM-124-L2-S-D-A-K?
Each of the 48 contacts in the SFM-124-L2-S-D-A-K is rated at 1A continuous current and 150V AC working voltage. With gold-plated contact surfaces providing contact resistance below 20 mΩ initial, the connector maintains reliable signal and low-power distribution in mixed-signal boards operating from -55°C to +125°C.
What does the 'L2' designator in SFM-124-L2-S-D-A-K mean for PCB assembly?
The L2 suffix specifies the tail length of the socket contacts, providing extra solder joint standoff height that improves solder wicking and visual inspection on 0.050" (1.27 mm) pitch fine-pitch surface mount pads. A longer tail also increases compliance under thermal cycling between -55°C and 125°C, reducing solder joint fatigue in industrial and aerospace applications.
How many mating cycles is the SFM-124-L2-S-D-A-K rated for, and does this suit development lab use?
SAMTEC SFM series socket strips are rated for a minimum of 100 mating cycles per SAMTEC specification, with gold-plated contacts maintaining contact resistance below 20 mΩ after cycling. For development lab and prototyping use where boards are repeatedly swapped, 100-cycle rating covers most design iteration cycles while the 48-position, 1.27 mm pitch layout maps directly to production module footprints.
Which SAMTEC header series mates with the SFM-124-L2-S-D-A-K socket strip?
The SFM-124-L2-S-D-A-K mates with SAMTEC's SSM series surface mount headers and TSM series terminal strips at 0.050" (1.27 mm) pitch. SAMTEC also offers SSW and TLW series through-hole mating options. The 48-position dual-row format supports direct substitution between socket-strip and header pairs without PCB re-layout, enabling flexible design reuse across product families.
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