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
Key Features
- 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
Applications
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) |
Alternate & Equivalent Parts
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.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”