SFM-127-02-LM-D-A-K SAMTEC Connector (Other) In Stock
SFM-127-02-LM-D-A-K is a SAMTEC 54-position dual-row high-reliability socket strip at 0.050" (1.27 mm) pitch with low-profile surface-mount termination, gold-plated contacts rated at 1 A per pin, and a keying option for polarized board-to-board mating. From $7.50 in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 54
- Lifecycle
- ACTIVE
- Datasheet
- SFM-127-02-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 54-position dual-row socket at 0.050" (1.27 mm) pitch with 27 contacts per row, delivering high-density board-to-board connectivity in a low-profile surface-mount footprint below 3 mm standing height
- Keyed (-K suffix) interface preventing reversed insertion across 30+ mating cycles, protecting signal integrity in 54-pin board-to-board mezzanine interfaces operating up to 1 A per pin
- Gold-plated contacts maintaining contact resistance below 20 mΩ over the -55°C to +125°C operating range, suitable for high-reliability embedded computing and aerospace mezzanine card designs
Applications
The SFM-127-02-LM-D-A-K is designed for low-profile mezzanine card stacking, compact embedded module interconnects, and high-reliability board-to-board interfaces in aerospace and defense electronics requiring a 54-position dual-row 0.050" pitch socket. Its low-profile (-LM suffix) surface-mount termination minimizes stack height in space-constrained avionics and FPGA daughter-card designs. The keyed mating feature ensures correct polarity during PCB assembly and field servicing of 54-pin dual-row board pairs.
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
What does the -LM suffix mean on SFM-127-02-LM-D-A-K, and how does it affect PCB stack height?
The -LM suffix denotes a low-profile mating height variant of the SFM-127 series. The low-profile body reduces the mated board-to-board stack height to less than 3 mm above the PCB surface at the 0.050" (1.27 mm) pitch interface, enabling very compact dual-board assemblies in avionics and embedded computing modules where mechanical clearance is limited.
How many contacts does SFM-127-02-LM-D-A-K provide, and at what current per pin?
The SFM-127-02-LM-D-A-K provides 54 contacts arranged in 2 rows of 27 at 0.050" (1.27 mm) pitch, with each gold-plated contact rated at 1 A. This supports mixed signal and low-power supply distribution across a single compact surface-mount socket footprint in high-density FPGA mezzanine and sensor interface boards.
When is SFM-127-02-LM-D-A-K preferable over SFM-137-L2-S-D-A-K in a mezzanine card design?
Choose SFM-127-02-LM-D-A-K when your mezzanine interface requires 54 positions (27 per row) with a low-profile stack height below 3 mm at 0.050" (1.27 mm) pitch. The SFM-137-L2-S-D-A-K provides 74 positions at the same pitch but with a taller standard profile. Select SFM-127 for designs where the 54-pin count matches the signal map and minimal board separation is the primary mechanical constraint.
Does the -K keying feature on SFM-127-02-LM-D-A-K support high-cycle reliability in test fixtures?
Yes, the -K keying feature on SFM-127-02-LM-D-A-K provides a mechanical polarization key that prevents incorrect insertion and guides proper mating alignment. Combined with gold-plated contacts rated for 30+ mating cycles at contact resistance below 20 mΩ, the SFM-127-K variant maintains reliable 54-pin connections in test fixture interfaces subject to repeated board insertions and removals.
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