SFM-121-02-FM-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-02-FM-D-A-K-TR is a 42-position dual-row surface mount socket strip with 0.050" (1.27 mm) pitch and high-reliability gold-plated contacts. It features a low-profile SMT design for dense board-to-board mezzanine interconnects. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-02-FM-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42-position dual-row layout with 0.050" (1.27 mm) pitch for high-density SMT board interconnects
- High-reliability gold-plated contacts rated for multiple mating cycles in demanding environments
- Surface mount termination compatible with standard reflow solder and pick-and-place assembly
- Low-profile design minimizes stack height in mezzanine and daughter card applications
Applications
The SFM-121-02-FM-D-A-K-TR is used in mezzanine board-to-board interconnect assemblies where 42 signal positions are required in a compact 1.27 mm pitch SMT format. It is well-suited for embedded computing modules, data acquisition cards, and FPGA daughter boards where reliable high-density signal connections are critical. Its dual-row configuration maximizes pin count per unit length of PCB edge, supporting efficient signal routing in rack-mount and box-build systems.
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
How many positions and what pitch does the SFM-121-02-FM-D-A-K-TR socket strip provide?
The SFM-121-02-FM-D-A-K-TR provides 42 positions arranged in a dual-row configuration with a 0.050" (1.27 mm) pitch. This layout delivers 21 signal positions per row in a compact length, making it suitable for high-density board-to-board connections in embedded computing and data acquisition systems where PCB space is limited.
What assembly method does the SFM-121-02-FM-D-A-K-TR use, and how does it fit into automated production?
The SFM-121-02-FM-D-A-K-TR uses surface mount technology (SMT) termination, compatible with standard pick-and-place equipment and reflow solder ovens. No through-hole drilling is required for the 42-position footprint, reducing PCB fabrication cost and supporting high-volume automated assembly on 1.27 mm pitch land patterns.
In which board-to-board applications does the SFM-121-02-FM-D-A-K-TR deliver the best performance?
This 42-position, 0.050" pitch SMT socket excels in mezzanine interconnects between a main board and a daughter card, such as FPGA expansion boards, processor modules, and industrial I/O cards. Its dual-row design at 1.27 mm pitch supports up to 42 signal lines in a short connector body, enabling compact stack heights below 8 mm in most mating configurations.
How does the SFM-121-02-FM-D-A-K-TR compare to a 2 mm pitch dual-row connector for the same signal count?
Compared to a 2 mm pitch dual-row connector carrying 42 positions, the SFM-121-02-FM-D-A-K-TR at 1.27 mm pitch reduces the connector body length by approximately 35%, freeing significant PCB real estate. The 0.050" pitch also allows finer escape routing on inner PCB layers, which is advantageous on 4-layer to 6-layer boards with dense via fields adjacent to the connector footprint.
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