SFM-143-02-STL-D-DS SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-02-STL-D-DS is an 86-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch featuring a surface mount STL tail style and dual-slot (DS) mounting retention for added mechanical stability. It provides gold-plated contacts and robust board retention in demanding PCB assembly environments. Available from stock worldwide for immediate delivery in both prototyping and production quantities.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 88
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-02-STL-D-DS Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-143-02-STL-D-DS?
- 86-position dual-row socket at 0.050" (1.27 mm) pitch with STL tail style for precise SMT solder joint geometry and coplanarity control
- Dual-Slot (DS) mounting feature providing additional mechanical retention to the PCB against lateral and rotational forces
- Gold-plated contacts ensuring stable sub-20 mΩ contact resistance and corrosion resistance across hundreds of mating cycles
- High-reliability construction suitable for aerospace, defense, and industrial instrumentation board-to-board interconnect requirements
What is SFM-143-02-STL-D-DS used for?
The SFM-143-02-STL-D-DS is used in mechanically demanding board-to-board interconnect applications where the standard SMT solder joints alone are insufficient to resist vibration or shock loading, such as aerospace avionics modules, military electronics, and ruggedized industrial computing boards. Its 86-position dual-row 0.050" pitch layout supports high signal count interfaces for FPGA daughtercards, signal processing modules, and high-channel data acquisition boards. The dual-slot mounting feature is particularly valued in applications subject to IEC 60068 or MIL-STD-810 vibration and shock test requirements.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-143-02-STL-D-DS datasheet?
SFM-143-02-STL-D-DS Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-143-02-STL-D-DS?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the DS (Dual-Slot) feature on SFM-143-02-STL-D-DS provide over a standard SMT socket strip?
The DS (Dual-Slot) mounting on the SFM-143-02-STL-D-DS adds two mechanical anchor slots that engage the PCB substrate, providing resistance to shear and pull forces that SMT solder joints alone cannot withstand. This is critical in environments with vibration levels above 5 g or shock events exceeding 50 g, such as those specified in MIL-STD-810G Test Method 514 for transportation and tactical environments. The dual-slot feature prevents connector displacement that could cause intermittent signal loss or solder joint cracking.
How does the STL tail style in SFM-143-02-STL-D-DS differ from a standard flat contact termination?
The STL tail style in the SFM-143-02-STL-D-DS specifies a specific contact lead geometry optimized for surface mount soldering, providing defined coplanarity and solder wicking profiles across all 86 positions. Compared to a standard flat contact, the STL tail geometry promotes more uniform solder joint fillets, which translates to lower variability in joint strength and electrical resistance. This is important for IPC Class 2 and Class 3 assembly standards where joint geometry consistency directly affects reliability scoring.
In which test environments is the SFM-143-02-STL-D-DS preferred over SFM-143-02-SM-D-LC for 86-position connectors?
The SFM-143-02-STL-D-DS is preferred in environments subject to mechanical vibration, shock, or repeated thermal cycling where the dual-slot (DS) mechanical retention provides board hold-down force in excess of the solder joint shear strength alone. In contrast, the SFM-143-02-SM-D-LC with its lead coplanarity (LC) feature is optimized for solder joint quality in precision SMT assembly environments with stable mounting conditions. Applications like avionics under 10 g RMS vibration or military field equipment subject to 100 g shock would select the DS variant.
For a 86-pin high-speed signal interface, how does the 0.050" pitch of SFM-143-02-STL-D-DS affect signal integrity?
At 0.050" (1.27 mm) pitch, the SFM-143-02-STL-D-DS contacts are spaced closely enough to support differential pair routing with controlled impedance, typically 85 Ω to 100 Ω differential, when PCB layer stackup is properly managed. The tight pitch allows 86 signals to be routed within a footprint approximately 54.6 mm long, keeping trace lengths short and minimizing propagation delay differences between pairs. This makes the connector suitable for differential protocols operating at data rates up to 3 Gbps per lane with careful PCB design.
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