SFM-143-T2-STL-D-A SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-T2-STL-D-A is an 86-position dual-row high-reliability surface-mount socket strip with 0.050-inch (1.27 mm) pitch and gold-plated female micro-terminal contacts. It provides secure low-insertion-force board-to-board mating with reliable high-cycle performance. Available in stock from authorized SAMTEC distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-T2-STL-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 86-position dual-row SMT socket on 1.27 mm (0.050-inch) pitch enabling high-density board-to-board signal routing in mezzanine card and expansion module designs
- High-reliability gold-plated micro-terminal contacts rated for 200+ mate-unmate cycles with contact resistance below 20 milliohms for stable signal integrity
- T2-STL termination variant provides straddle-mount tail configuration for controlled-impedance PCB stack-ups supporting differential signals above 3 GHz
Applications
The SFM-143-T2-STL-D-A is designed for high-density board-to-board interconnect on FPGA mezzanine boards, high-speed communication expansion cards, and industrial backplane systems where 86 signals must be routed in a compact 1.27 mm pitch SMT footprint. Its straddle-mount tail configuration suits applications requiring precise impedance control for multi-gigabit differential signaling across card edges. The high-reliability contact system also makes it appropriate for ruggedized computing and test equipment platforms subject to vibration and repeated insertion cycles.
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 are the position count, pitch, and contact rating of the SFM-143-T2-STL-D-A?
The SFM-143-T2-STL-D-A provides 86 positions arranged in dual rows on a 1.27 mm (0.050-inch) pitch. Each gold-plated micro-terminal contact is rated for up to 1 A continuous current with contact resistance below 20 milliohms, making it suitable for both high-density signal and light power distribution across board-to-board interfaces in SMT assemblies.
How does the straddle-mount (STL) tail configuration of the SFM-143-T2-STL-D-A benefit high-speed differential signal routing?
The STL straddle-mount tail places the contact tail at the PCB edge rather than on the surface, allowing PCB designers to route differential pairs with 100-ohm impedance directly to the connector without excess stub length. This geometry reduces discontinuities in the transmission line and supports signal integrity at frequencies above 3 GHz per differential pair, which is critical for PCIe, SATA, and similar high-speed protocols.
How does the 86-position SFM-143-T2-STL-D-A differ from the 88-position SFM-144 and which design scenario favors each?
The SFM-143-T2-STL-D-A has 86 pins while the SFM-144 series provides 88 pins, a difference of 2 positions and approximately 2.5 mm in connector body length at 1.27 mm pitch. Designs where the PCB edge length budget allows only 86 pins before reaching a mechanical keepout or board cutout benefit from the SFM-143; designs with available edge length and additional signal count requirements use the SFM-144.
Is the SFM-143-T2-STL-D-A compatible with lead-free reflow soldering and what peak reflow temperature does it support?
Yes, the SFM-143-T2-STL-D-A supports lead-free SMT reflow soldering at peak temperatures up to 260°C in accordance with IPC/JEDEC J-STD-020. The connector housing withstands up to 3 reflow passes without dimensional distortion, making it suitable for double-sided SMT assemblies common in high-density production environments.
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