SFM-127-02-STL-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-127-02-STL-D-A-K-TR is a 54-position dual-row high-reliability surface mount socket strip at 0.050 inch pitch with gold contacts, STL low-profile design, and key polarization. Suited for compact mezzanine board-to-board assemblies. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 54
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 54-position dual-row SMT socket strip at 0.050 inch (1.27 mm) pitch enabling high-density board-to-board signal connections in a minimal PCB footprint
- STL (surface mount low-profile) body combined with K keying option ensures correct mating orientation and reduced stack height for compact multi-board assemblies
- Gold-plated (A) contacts with tape-and-reel (TR) packaging delivering low contact resistance and automated assembly support for high-volume production
Applications
The SFM-127-02-STL-D-A-K-TR is used in FPGA mezzanine expansion boards, compact industrial sensor modules, and wireless communication daughterboards where 54 dual-row signals are required at 0.050 inch pitch. Its keyed low-profile SMT design makes it ideal for multi-board assemblies in portable instruments and medical devices where board height and mating accuracy are critical constraints.
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 does the K keying option on the SFM-127-02-STL-D-A-K-TR differ functionally from a non-keyed version?
The K keying option adds a physical key slot to the 54-position dual-row connector housing, ensuring that only a mating header with a matching key post can engage the socket. This prevents accidental 180-degree misconnection across all 54 pins at 0.050 inch pitch, which is especially important in densely populated boards where visual alignment of fine-pitch connectors during PCB assembly or field service is difficult.
For a 54-pin signal bus at 0.050 inch pitch, what stack height does the STL profile of the SFM-127-02-STL-D-A-K-TR enable?
The STL (surface mount low profile) design of the SFM-127-02-STL-D-A-K-TR keeps the connector body height below 2.5 mm above the PCB surface, enabling total board-to-board stack heights as low as 5 mm when mated with a matching low-profile header. This is critical in portable instruments and embedded modules where a 54-pin dual-row interconnect must fit within a constrained enclosure height at 0.050 inch pitch.
When should a designer choose the SFM-127-02-STL-D-A-K-TR over a higher pin-count SFM connector for an embedded processor expansion board?
The 54-position count covers a 32-bit data bus plus up to 22 additional signals for address lines, chip selects, and power pins, making SFM-127-02-STL-D-A-K-TR sufficient for most single-device processor expansion interfaces. Choosing a larger pin-count SFM connector would add board area and cost without benefit when fewer than 55 signals are needed; the 54-position version minimizes connector footprint at 0.050 inch pitch while meeting the full interface requirement.
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