SFM-139-T2-LM-D SAMTEC Connector (Other) In Stock
Samtec SFM-139-T2-LM-D is a 78-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch, designed for surface mount applications demanding a large contact count with precision alignment and secure mechanical retention.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-T2-LM-D Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row (39x2) arrangement on 0.050" pitch enables very high signal density in a compact surface mount footprint
- High-reliability socket construction with low-profile SMT termination for robust automated PCB assembly
- Designed for demanding environments, supporting consistent electrical performance across industrial temperature and vibration conditions
Applications
The SFM-139-T2-LM-D is ideal for high-density mezzanine board interconnects, FPGA daughter cards, and signal processing modules where 78 contacts must be routed within a minimal PCB area at 0.050" pitch. Its surface mount format integrates smoothly into automated assembly lines, reducing manufacturing complexity while delivering reliable board-to-board connectivity. Industrial control systems, telecommunications line cards, and medical imaging equipment benefit from its combination of contact density and mechanical reliability.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SFM-139-T2-LM-D:
Board Connector, 78 Contact(s), 2 Row(s), Female, Straight, 0.05 inch Pitch, Surface Mount Terminal, Black Insulator, Socket
Board Connector, 78 Contact(s), 2 Row(s), Female, Straight, 0.05 inch Pitch, Surface Mount Terminal, Black Insulator, Socket
Board Connector, 78 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socket
Board Connector, 78 Contact(s), 2 Row(s), Female, Straight, Surface Mount Terminal, Socket
Frequently Asked Questions
How many contacts does the SFM-139-T2-LM-D provide and how are they distributed across rows?
The SFM-139-T2-LM-D provides 78 contacts arranged in a dual-row (39x2) configuration on a 0.050" (1.27 mm) pitch. This layout delivers high-density interconnection for FPGA modules, mezzanine cards, and signal processing boards within a compact surface mount footprint.
For a dense FPGA daughter card, how does the SFM-139-T2-LM-D's 0.050" pitch benefit layout efficiency?
At 0.050" (1.27 mm) pitch, the SFM-139-T2-LM-D concentrates 78 contacts into a much smaller board area than 0.100" pitch equivalents, roughly halving the connector length. This allows designers to route more signals or power rails in the same PCB space, which is critical for compact FPGA and DSP daughter card applications.
Is the SFM-139-T2-LM-D compatible with standard SMT reflow soldering processes?
Yes, the SFM-139-T2-LM-D uses surface mount termination fully compatible with standard SMT reflow soldering at profiles up to 260°C peak. Its SMT pads allow automated pick-and-place assembly, and the 78-position dual-row design ensures stable seating during the reflow process without mechanical fixturing.
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