SFM-127-L2-LM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-127-L2-LM-D-A-K is a 54-position dual-row high-reliability socket strip with 1.27 mm (0.050 inch) pitch for surface mount board-to-board interconnect. It features a low-mating-height profile (LM) to minimize stack height in compact multi-board assemblies. Designed for demanding electronics applications requiring 54 high-density signal connections.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 54
- Lifecycle
- ACTIVE
- Datasheet
- SFM-127-L2-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 strip on 1.27 mm (0.050 inch) fine pitch, providing 27 contacts per row for very high signal density
- Low-mating-height (LM suffix) design reduces board-to-board stack height for compact multi-PCB assemblies
- High-reliability contact system rated for extended insertion cycles in field-serviceable and production test applications
- Surface mount termination supports automated SMT reflow assembly with lead-free solder compatibility
Applications
The SFM-127-L2-LM-D-A-K serves high-density board-to-board interconnect in FPGA development platforms, high-speed signal processing modules, and industrial I/O expansion cards that require 54 independent signal connections. The 0.050 inch pitch allows these 54 connections in a footprint suitable for compact PCB designs where board space is at a premium. Its high-reliability contacts and low-mating-height configuration make it well suited for stacked board assemblies in rugged instrumentation and communications 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 per row does the SFM-127-L2-LM-D-A-K provide on its 0.050 inch pitch?
The SFM-127-L2-LM-D-A-K provides 54 total positions in a dual-row layout with 27 contacts per row on a 1.27 mm (0.050 inch) pitch. This fine pitch allows routing of all 54 signals in a much smaller PCB footprint than equivalent 2.54 mm pitch connectors, enabling more compact board designs.
For a stacked PCB assembly requiring minimal height clearance, what board-to-board separation does the LM suffix on SFM-127-L2-LM-D-A-K target?
The LM (low-mating-height) suffix indicates the SFM-127-L2-LM-D-A-K is designed for reduced board-to-board stack heights, typically achieving approximately 4 mm to 5 mm between two mated PCBs. This is significantly lower than standard mating height variants and is critical in multi-board assemblies that must fit within enclosures taller than 10 mm total.
Which mating connector pairs with SFM-127-L2-LM-D-A-K at the 1.27 mm pitch dual-row layout?
The SFM-127-L2-LM-D-A-K mates with SAMTEC TSM series or SSM series pin headers on the same 1.27 mm (0.050 inch) dual-row pitch. Both the pin header and socket must be on the LM (low-mating-height) variant to achieve the reduced stack height specification and maintain proper 54-position electrical engagement.
When selecting between SFM-127-L2-LM-D-A-K and a 54-position FFC cable assembly for a portable device, what are the key trade-offs?
The SFM-127-L2-LM-D-A-K provides a rigid, vibration-resistant 54-pin board-to-board connection at 1.27 mm pitch that supports repeated field mating, whereas a flat flexible cable (FFC) assembly offers routing flexibility but is more susceptible to mechanical fatigue and connector wear over fewer than 30 mating cycles in typical ZIF housings. For portable devices with frequent board access, the SFM-127-L2-LM-D-A-K's high-reliability contacts are the better choice.
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