SFM-138-L2-LM-D-A-P SAMTEC Connector (Other) In Stock
The SFM-138-L2-LM-D-A-P is a 76-position, dual-row, 0.050" pitch high-reliability surface-mount socket strip from SAMTEC, offering long-machined contacts for superior retention and precision alignment in mezzanine and board stacking applications. Ideal for dense high-channel-count interconnects. Available from stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 76
- Lifecycle
- ACTIVE
- Datasheet
- SFM-138-L2-LM-D-A-P Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 76-position dual-row layout on 0.050" (1.27 mm) pitch provides 76 signal or power channels in a compact SMT envelope
- Long-machined (LM) contacts deliver greater engagement depth and higher retention force than stamped alternatives
- High-reliability SFM-series socket design maintains contact resistance below 20 mΩ over extended thermal and vibration cycling
- Precision alignment (A) feature enables accurate guided mating with complementary header in mezzanine stack configurations
Applications
The SFM-138-L2-LM-D-A-P is engineered for high-channel-count mezzanine interconnects in embedded computing, aerospace avionics, and high-speed data-acquisition systems requiring 76 reliable signal paths between stacked PCBs. Long-machined contacts provide superior retention, making it suitable for applications subject to vibration or shock loads up to 50 G. The surface-mount form factor with precision alignment simplifies board stack assembly and supports operating temperatures from -55°C to 125°C.
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 advantage do the long-machined contacts in SFM-138-L2-LM-D-A-P provide over standard stamped contacts in vibration environments?
Long-machined (LM) contacts in the SFM-138-L2-LM-D-A-P offer a deeper engagement depth of approximately 1.5 mm versus 0.8 mm for stamped contacts, resulting in higher normal force and retention that maintains reliable electrical contact under vibration levels up to 50 G and shock pulses typical of military and aerospace installations.
How many signal channels does SFM-138-L2-LM-D-A-P accommodate, and what board area does the connector consume?
SFM-138-L2-LM-D-A-P carries 76 positions in a dual-row configuration on a 0.050" (1.27 mm) pitch, occupying a board footprint of roughly 48 mm × 3 mm — enabling 76 independent channels in under 150 mm² of PCB area, which is less than half the space a 0.100" pitch equivalent would require.
Is SFM-138-L2-LM-D-A-P qualified for the temperature range needed in aerospace or defense mezzanine stacks?
SAMTEC SFM-series high-reliability socket strips operate from -55°C to 125°C, making SFM-138-L2-LM-D-A-P compatible with MIL-STD-810 thermal requirements for airborne electronics, ground vehicles, and shipboard systems where 76-channel mezzanine connectors must survive both arctic and high-power-dissipation environments without contact failure.
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