SFM-143-L2-FM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-L2-FM-D-A-K is an 86-position dual-row high-reliability surface-mount socket strip with 0.050" (1.27 mm) pitch, female mating face, and mechanical keying. Engineered for secure high-density mezzanine interconnects in embedded computing, FPGA, and rugged industrial systems.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-L2-FM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 86-position dual-row layout at 0.050" (1.27 mm) pitch supports ultra-high signal density in compact surface-mount mezzanine designs
- Mechanical keying (K) prevents incorrect orientation during mating, reducing assembly errors in field-replaceable module and daughter-card installations
- Female mating face (FM) and L2 stand-off height ensure controlled coplanarity and consistent electrical contact across all 86 positions during SMT reflow assembly
Applications
The SFM-143-L2-FM-D-A-K is designed for mezzanine board-to-board interfaces in FPGA system-on-module designs, embedded processor carrier boards, and industrial I/O expansion assemblies requiring 86 signals in a minimal footprint. Its keyed female socket prevents reverse insertion in field environments. Engineers select it for mission-critical data communications, ruggedized avionics expansion modules, and high-cycle-count test fixture interfaces.
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 electrical interface does the SFM-143-L2-FM-D-A-K provide for board-to-board connections?
The SFM-143-L2-FM-D-A-K provides an 86-position dual-row female socket interface at 0.050" (1.27 mm) pitch, enabling 43 contacts per row. Its surface-mount termination supports up to 1 A per contact and is compatible with standard 100-ohm differential impedance trace routing on 4-layer PCBs used in high-speed digital mezzanine designs.
How does the keying option on SFM-143-L2-FM-D-A-K reduce assembly risk in multi-board systems?
The K (keying) feature on SFM-143-L2-FM-D-A-K introduces a physical polarization block that prevents 180-degree mis-insertion of the mating header. This safeguard is critical in 86-pin dual-row assemblies where reversed connection could damage dozens of signal lines simultaneously, protecting FPGAs, processors, and other sensitive devices on the carrier board during prototype bring-up or field replacement.
Which alternative SAMTEC SFM series variants should engineers consider when sourcing a substitute for SFM-143-L2-FM-D-A-K?
When sourcing alternatives to SFM-143-L2-FM-D-A-K, engineers may evaluate SAMTEC SFM-143-02-STL-D-A (same 86 positions, 0.050" pitch, without keying) or SFM-144-L2-S-D-A-K (88 positions with keying) for slightly different pin count requirements. All variants share the SFM series 0.050" pitch and SMT termination, making PCB land pattern changes minimal when switching between them.
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