SFM-123-L2-FM-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-123-L2-FM-D-A-P-TR is a 46-position dual-row high-reliability surface-mount socket strip with 1.27 mm (0.050") pitch, full metal shield, through-hole assist posts, and polarization peg. Tape-and-reel packaged for automated SMT production. From $4.20 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-L2-FM-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-FM-D-A-P-TR?
- 46-position dual-row socket at 1.27 mm (0.050") pitch delivering 46 signal lines in a compact high-density SMT footprint
- Full metal shield (FM) option providing broadband EMI attenuation above 1 GHz for high-speed signal integrity
- Through-hole assist posts (A) and polarization peg (P) combined for maximum mechanical retention and assembly error prevention
- Tape-and-reel (TR) packaging compatible with standard automated pick-and-place machines for high-volume SMT production
What is SFM-123-L2-FM-D-A-P-TR used for?
The SFM-123-L2-FM-D-A-P-TR is used in high-density mezzanine interconnect applications within telecommunications, server blade systems, and high-speed data acquisition hardware requiring 46-pin dual-row board-to-board connections at 1.27 mm pitch. The full metal shield makes it particularly well-suited for adjacent RF or high-speed digital environments where signal integrity at frequencies above 1 GHz is critical. Through-hole assist posts and polarization peg ensure robust mechanical performance in industrial and aerospace platforms subject to repeated mating cycles and vibration.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-123-L2-FM-D-A-P-TR datasheet?
SFM-123-L2-FM-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-123-L2-FM-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the total pin count and pitch of the SFM-123-L2-FM-D-A-P-TR, and how does the dual-row layout help route wide buses?
The SFM-123-L2-FM-D-A-P-TR has 46 positions in a dual-row configuration at 1.27 mm (0.050 inch) pitch, placing 23 contacts per row. This allows a 46-wire parallel bus — such as a 32-bit address bus plus 14 control lines — to be routed over a connector body less than 30 mm long, compared to over 50 mm for a single-row 2.54 mm pitch alternative.
How does the full metal shield (FM) on the SFM-123-L2-FM-D-A-P-TR protect signal integrity in dense high-speed board assemblies?
The full metal shield surrounds the connector's contact field and provides continuous shielding continuity between the two mated PCBs, reducing cross-talk and radiated EMI at frequencies above 1 GHz. In high-speed server blade assemblies where PCIe or 10 Gbps Ethernet signals share a backplane with 46-pin mezzanine connectors, the FM shield can reduce inter-connector crosstalk by 10 dB to 20 dB compared to an unshielded variant.
For a high-vibration avionics module, how do the combined A and P options on the SFM-123-L2-FM-D-A-P-TR contribute to connector reliability?
The through-hole assist posts (A option) insert into PCB holes and distribute the mechanical stress of 46-pin mating forces away from the SMT solder joints, which would otherwise be the weakest point under vibration loads of 10 G or more. The polarization peg (P option) ensures the connector is always inserted correctly, preventing orientation-related damage that could short 3.3V power lines to signal ground in a 46-pin dual-row interface during field maintenance.
When does it make sense to select the SFM-123-L2-FM-D-A-P-TR over a smaller 40-pin version for a mezzanine expansion interface?
The 46-position version is justified when the interface protocol requires more than 40 signals — for example, a 32-bit parallel bus with 8 address lines, 4 control signals, and 2 power pins totaling 46 dedicated connections. Stepping up from 40 pins to 46 pins at 1.27 mm pitch adds only about 7.6 mm to the connector body length while avoiding the overhead of routing 6 signals through a separate secondary connector, which would complicate PCB layout and add a second connector cost.
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