SFM-124-L2-L-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-124-L2-L-D-A-K is a 48-position dual-row high-reliability surface-mount socket strip with 0.050 inch pitch, featuring low-profile housing and key polarization for foolproof mating, suited for compact high-density board-to-board interconnection.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 48
- Lifecycle
- ACTIVE
- Datasheet
- SFM-124-L2-L-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 48-position dual-row socket strip at 0.050 inch (1.27 mm) pitch enabling high-contact-density surface-mount interconnection in half the PCB footprint of equivalent 0.100 inch pitch connectors
- Key (K) polarization feature preventing incorrect connector orientation during mating, eliminating misalignment risk in 48-pin high-density assemblies
- Low-profile (L) surface-mount construction minimizing board-to-board stack height for compact module and mezzanine card designs requiring thin interconnect profiles
Applications
The SFM-124-L2-L-D-A-K is designed for high-density surface-mount mezzanine and daughter card interconnection in embedded computing, FPGA module carriers, and telecommunications line cards requiring 48 contacts at 0.050 inch pitch. The keyed polarization prevents reversed mating in field-serviced or high-mix production environments where identical-looking connectors must be connected in the correct orientation. Its low-profile surface-mount design minimizes board stack height in compact multi-board assemblies and system chassis with tight clearance constraints.
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 makes the SFM-124-L2-L-D-A-K suitable for high-density mezzanine card designs?
The SFM-124-L2-L-D-A-K provides 48 contacts in a dual-row socket at 0.050 inch (1.27 mm) pitch, achieving the same contact count as a 0.100 inch pitch connector in half the board footprint length. Its low-profile surface-mount housing minimizes the board-to-board stack height, which is critical in multi-board assemblies and mezzanine card configurations where clearance between boards may be less than 5 mm.
How does the key (K) polarization option prevent mating errors on the SFM-124-L2-L-D-A-K?
The key (K) designation on the SFM-124-L2-L-D-A-K indicates a mechanical polarization feature, typically a notch or protrusion on the connector housing, that physically prevents the connector from being inserted in the wrong orientation. For 48-pin dual-row high-density connectors at 0.050 inch pitch, this is especially important in production and field service scenarios where reversing a connector could apply power or signals to incorrect circuit nodes and cause component damage.
How does the SFM-124-L2-L-D-A-K compare to SAMTEC's tape-and-reel variants for production environments?
The SFM-124-L2-L-D-A-K does not carry the TR (tape-and-reel) suffix, indicating it is supplied in tray or bulk packaging rather than tape-and-reel. This makes it better suited for low-to-medium volume production or prototype PCB assembly where individual placement by hand or semi-automated equipment is practical for the 48-position 0.050 inch pitch socket. For high-volume automated pick-and-place SMT lines running thousands of boards per day, the tape-and-reel variants such as SFM-124-L2-L-D-A-K-TR would be specified instead.
Which SAMTEC male pin strip mates with the SFM-124-L2-L-D-A-K to complete the 48-position interconnect?
The SFM-124-L2-L-D-A-K socket mates with SAMTEC 0.050 inch pitch dual-row male pin headers from compatible TFM or SFM male series at the same 1.27 mm pitch and 48-position count. SAMTEC designs these matched socket and header pairs to specified mating and unmating forces, typically measured in grams per contact, ensuring repeatable electrical continuity with contact resistance well below 50 milliohms across all 48 positions through the rated number of insertion cycles.
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