SFM-143-T2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-T2-STL-D-A-K is an 86-position dual-row high-reliability surface mount socket strip at 0.050-inch pitch with straddle mount termination. Designed for dense mezzanine and daughter-card board-to-board interconnect. Available from distributor stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-T2-STL-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-143-T2-STL-D-A-K?
- 86-position dual-row socket strip at 0.050-inch pitch with straddle mount termination for PCB edge-mount applications requiring minimal board height
- High-reliability Tiger Eye contact design providing gas-tight, low-resistance mating with rated contact resistance below 20 mΩ per pin
- T2 tail length and STL straddle mount option enabling board edge mounting in compact sandwich-stack PCB architectures
What is SFM-143-T2-STL-D-A-K used for?
The SFM-143-T2-STL-D-A-K is engineered for high-density straddle-mount PCB edge connector applications in telecommunications equipment, data storage backplanes, and defense electronics. Its 86-position dual-row 0.050-inch pitch layout supports large FPGA I/O expansion boards and multi-card module stacking configurations where maximizing signal count per unit area is critical. The straddle mount design simplifies PCB layout by placing the connector at the board edge rather than requiring inner-layer routing.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-143-T2-STL-D-A-K datasheet?
SFM-143-T2-STL-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-143-T2-STL-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the contact pitch and total position count of the SFM-143-T2-STL-D-A-K, and how does straddle mounting affect PCB layer usage?
The SFM-143-T2-STL-D-A-K features 86 positions in a dual-row layout at 0.050-inch (1.27 mm) pitch, with 43 positions per row. The straddle mount termination (STL) positions the connector to straddle the PCB edge, eliminating the need to route all 86 signals through inner PCB layers — a significant advantage for boards with 4 or fewer routing layers where inner-layer congestion at a center-mounted 0.050-inch pitch connector would be problematic.
Which SAMTEC plug connector mates with the SFM-143-T2-STL-D-A-K for a complete high-density mezzanine stack?
The SFM-143-T2-STL-D-A-K is designed to mate with SAMTEC CLM or TSM series male strip connectors at 0.050-inch pitch and 86-position dual-row configuration. The mated pair provides contact resistance below 20 mΩ per pin and is rated for a minimum of 100 mating cycles. For straddle mount applications, a matching CLM-143 or equivalent male strip is used on the mating daughter card, forming a mechanically stable 86-pin interconnect at the board edge.
How does SFM-143-T2-STL-D-A-K differ from the SFM-146-L2-S-D-A-K in position count and mount style for a backplane design?
The SFM-143-T2-STL-D-A-K has 86 positions with a T2 tail and straddle mount (STL) for PCB edge placement, while the SFM-146-L2-S-D-A-K has 92 positions with a standard surface mount L2 tail for inner-board placement. For backplane designs where signals route to the PCB edge, the SFM-143 STL is preferred. When 92 signals are required and center-board mounting is acceptable, the SFM-146 is the correct choice with its 6 additional positions.
Can SFM-143-T2-STL-D-A-K withstand the 260°C peak temperature of standard lead-free reflow soldering?
SAMTEC SFM series surface mount socket strips, including the SFM-143-T2-STL-D-A-K, are specified for compatibility with lead-free reflow soldering profiles peaking at 260°C per J-STD-020 requirements. The connector housing material is rated for short-duration exposure at reflow temperatures, and the tin-plated SMT tails are compatible with SnAgCu solder paste used in RoHS-compliant assembly. Engineers should verify that the board-side pads and stencil apertures match SAMTEC's recommended footprint to ensure full solder joint coverage at reflow.
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