SFM-128-02-H-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-128-02-H-D-A-K-TR is a 56-position dual-row high-reliability surface mount socket strip with 0.050" (1.27 mm) pitch, offering a tall profile and keyed alignment for secure board-to-board and mezzanine connector assemblies. Tape-and-reel packaging supports automated SMT production workflows. Available in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- SFM-128-02-H-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 56 contacts in 2 rows at 0.050" (1.27 mm) pitch for high-density board-to-board and mezzanine signal routing
- High-profile (H) and keyed (K) design prevents misalignment and incorrect mating across all 56 positions
- Tape-and-reel (TR) SMT packaging enables automated pick-and-place assembly in high-volume PCB production lines
Applications
The SFM-128-02-H-D-A-K-TR is designed for industrial computing, telecommunications line cards, and FPGA expansion modules that require 56 signal connections with mechanical keying to prevent board misalignment. Its high-profile contact design accommodates taller board stack heights, making it useful in chassis-mounted systems with additional PCB spacing constraints. The dual-row 1.27 mm pitch layout ensures reliable signal integrity across a wide range of data bus widths.
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 contacts does SFM-128-02-H-D-A-K-TR provide and what does the keyed (K) designation mean?
The SFM-128-02-H-D-A-K-TR has 56 contacts arranged in 2 rows at 0.050 inch (1.27 mm) pitch. The K designator indicates a keyed housing that physically prevents incorrect mating orientation, ensuring all 56 positions align correctly with the mating connector. This feature is critical in dense board assemblies where reversing a connector could damage signals or power rails.
What does the high-profile (H) designation indicate for SFM-128-02-H-D-A-K-TR?
The H designation for the SFM-128-02-H-D-A-K-TR refers to a taller contact or housing height compared to standard-profile SFM variants. This accommodates board-to-board mezzanine stacks requiring greater clearance between PCBs—typically to route cables, fit heat sinks, or satisfy chassis spacing requirements—while maintaining the same 1.27 mm pitch and 56-position dual-row configuration.
For a telecom line card with 56 signal lines, why choose SFM-128-02-H-D-A-K-TR over a non-keyed variant?
In a telecom line card with 56 differential pairs or mixed-voltage signals, the keyed housing of the SFM-128-02-H-D-A-K-TR prevents inadvertent reverse insertion during field servicing, eliminating the risk of cross-connecting 3.3 V and 5 V rails or flipping high-speed serial lanes. The 1.27 mm pitch and keying combination is especially valuable when multiple identical connectors are present on the same board and orientation errors are costly.
Is SFM-128-02-H-D-A-K-TR compatible with automated SMT assembly?
Yes, the SFM-128-02-H-D-A-K-TR is supplied on tape-and-reel (TR) carrier, making it directly compatible with automated pick-and-place SMT assembly equipment. The 1.27 mm pitch SMT pads support standard reflow soldering, and the tape-and-reel format reduces handling time and placement errors across the 56-position footprint in production-scale PCB manufacturing.
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