SFM-121-L2-LM-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-L2-LM-D-A-P-TR is a 42-position dual-row high-reliability surface-mount socket strip at 0.050" (1.27 mm) pitch, featuring a low-profile SMT termination and tape-and-reel packaging for automated assembly. Available in stock worldwide for board-to-board mezzanine interconnect designs.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-L2-LM-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-121-L2-LM-D-A-P-TR?
- 42-position dual-row SMT socket strip at 0.050" (1.27 mm) pitch for mid-density board-to-board signal and power routing
- Low-profile surface-mount design minimizes stack height while maintaining high-reliability contact performance across mating cycles
- Tape-and-reel (TR) packaging supports automated pick-and-place assembly in high-volume SMT production environments
- Dual-row contact arrangement provides superior ground and signal separation for noise-sensitive digital and mixed-signal boards
What is SFM-121-L2-LM-D-A-P-TR used for?
The SFM-121-L2-LM-D-A-P-TR is used in FPGA carrier boards, embedded computing modules, and test-and-measurement platforms where a 42-pin dual-row mezzanine connector at 1.27 mm pitch is required for high-density PCB-to-PCB interconnects. Its tape-and-reel format suits high-volume automated assembly lines producing networking daughter cards, industrial controller boards, and medical diagnostic equipment requiring reliable SMT socket connections. The low-profile SMT body also benefits portable instrumentation and military-grade assemblies where minimizing PCB height is a design constraint.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-121-L2-LM-D-A-P-TR datasheet?
SFM-121-L2-LM-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-121-L2-LM-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many positions and rows does the SFM-121-L2-LM-D-A-P-TR provide, and what pitch does it use?
The SFM-121-L2-LM-D-A-P-TR features 42 positions arranged in a dual-row layout at 0.050" (1.27 mm) pitch. This configuration provides 21 contacts per row and suits applications requiring mid-density board-to-board signal routing with current ratings up to 1 A per contact in a compact SMT footprint.
What assembly process is the SFM-121-L2-LM-D-A-P-TR optimized for, and how does the packaging facilitate production?
The SFM-121-L2-LM-D-A-P-TR is optimized for automated SMT reflow soldering and ships in tape-and-reel (TR) format compatible with standard pick-and-place equipment. The surface-mount termination withstands reflow peak temperatures up to 260 °C, enabling integration into standard IPC J-STD-020 assembly flows for high-volume PCB production.
In which application areas does the SFM-121-L2-LM-D-A-P-TR offer advantages over through-hole socket alternatives?
Compared to through-hole socket strips, the SFM-121-L2-LM-D-A-P-TR reduces PCB height and eliminates drilled vias across 42 positions, saving board real estate and reducing assembly steps. Applications such as FPGA mezzanine cards, industrial I/O modules, and embedded single-board computers benefit from the lower profile and automated SMT placement at 1.27 mm pitch.
When would a designer choose the SFM-121-L2-LM-D-A-P-TR over a higher-pin-count variant like the SFM-147?
A designer selects the SFM-121-L2-LM-D-A-P-TR's 42-position count when the application requires approximately 40 signal or power connections without the added board length of the 94-position SFM-147. This is common in embedded modules with constrained PCB dimensions where a 42-pin interface carrying 3.3 V, 5 V, and ground rails alongside a 32-bit data bus is the target architecture.
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