SFM-143-L2-SM-D-LC SAMTEC Connector (Other) In Stock
SFM-143-L2-SM-D-LC is an 86-position dual-row surface mount socket strip from SAMTEC with 0.050" pitch, low-clearance (LC) mating profile, and SM (surface mount) termination for compact board-to-board stacking. Available in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-L2-SM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-143-L2-SM-D-LC?
- 86-position dual-row configuration at 0.050" (1.27 mm) pitch for high-density signal routing across stacked PCB assemblies
- Low-clearance (LC) mating design achieves minimal board-to-board stack height for space-constrained embedded modules
- Surface mount (SM) termination eliminates through-hole drilling and supports standard SMT reflow assembly processes
- Tiger Eye contact technology ensures high normal contact force and reliable gas-tight connections over many mating cycles
- High-reliability dual-row socket strip validated for harsh environments including industrial, aerospace, and defense applications
What is SFM-143-L2-SM-D-LC used for?
The SFM-143-L2-SM-D-LC is designed for high-density mezzanine board interconnects, processor daughter cards, and FPGA expansion modules requiring 86 signal positions at 0.050" pitch within a low-profile stacking configuration. Its low-clearance mating profile is ideal for layered embedded computing assemblies where inter-board separation must be minimized to a few millimeters. The surface mount termination and Tiger Eye contacts also make it a reliable choice for industrial automation and defense electronics requiring consistent electrical performance across wide temperature ranges.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-143-L2-SM-D-LC datasheet?
SFM-143-L2-SM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-143-L2-SM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many signal positions does the SFM-143-L2-SM-D-LC provide, and how are they arranged across rows?
The SFM-143-L2-SM-D-LC provides 86 positions in a dual-row layout at 0.050" (1.27 mm) pitch, with 43 contacts per row. This 86-position count is suited for medium-to-high density board-to-board interfaces such as FPGA I/O expansion connectors, processor mezzanine cards, and embedded computing daughter boards where routing 43 signals per row covers both data bus and control line requirements in a single connector footprint.
What does the LC suffix indicate in SFM-143-L2-SM-D-LC, and what stack height does it enable?
The LC suffix designates a low-clearance mating variant, meaning the vertical separation between the two mated PCBs is reduced below that of standard SFM connectors. Low-clearance designs are typically engineered for board-to-board gaps in the range of 4 mm to 8 mm, enabling tightly stacked module assemblies in portable instruments, compact embedded computers, and avionics line-replaceable units where the enclosure limits the available inter-board space to single-digit millimeters.
How does the SFM-143-L2-SM-D-LC differ from a standard-clearance SAMTEC SFM socket of the same position count?
The primary difference is the mating stack height: the SFM-143-L2-SM-D-LC uses a low-clearance (LC) contact geometry that reduces the board-to-board gap by several millimeters compared to a standard SFM socket with the same 86-position dual-row 0.050" pitch layout. In practice, this means an LC variant might achieve a 5 mm inter-board stack versus 8 mm to 12 mm for a standard variant, directly reducing the Z-height of the overall assembly and enabling more compact enclosure designs.
Is the SFM-143-L2-SM-D-LC suitable for high-vibration industrial or aerospace environments?
Yes. The SFM-143-L2-SM-D-LC uses SAMTEC's Tiger Eye contact technology, which delivers a higher normal contact force than standard stamped contacts, maintaining a gas-tight electrical interface under mechanical vibration and thermal cycling. Combined with the dual-row low-clearance socket design, the connector is validated for harsh operating environments with temperatures from -55°C to +125°C, making it appropriate for industrial motor drive controllers, military communication equipment, and aerospace avionics boards.
Which SAMTEC mating headers are designed to plug into the SFM-143-L2-SM-D-LC, and how should designers select them?
The SFM-143-L2-SM-D-LC is designed to mate with SAMTEC dual-row plug headers in the TSM, FLE, and THM series at 0.050" (1.27 mm) pitch. Because the socket carries the low-clearance (LC) designation, designers must pair it with a compatible low-clearance plug header — using a standard-height plug will not achieve the correct mating depth and may cause mechanical interference. SAMTEC's online Connector Configurator tool allows filtering by 86-position dual-row LC options to identify the correct mating plug for a given stack height requirement.
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