SFM-143-02-SM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-143-02-SM-D-LC is an 86-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch for surface mount applications. It incorporates lead coplanarity (LC) control and gold-plated contacts to ensure consistent solder joints and low contact resistance across all 86 positions. Available from stock worldwide for immediate shipment in prototyping and production quantities.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 86
- Lifecycle
- ACTIVE
- Datasheet
- SFM-143-02-SM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 86-position dual-row socket at 0.050" (1.27 mm) pitch providing 43 positions per row for very high density board-to-board signal routing
- Lead Coplanarity (LC) specification ensuring all 86 contacts meet ±0.10 mm height tolerance for reliable SMT reflow solder joint quality
- Surface mount (SM) design compatible with standard reflow soldering and pick-and-place automated assembly at up to 260°C peak temperature
- High-reliability gold-plated contacts maintaining stable contact resistance below 20 mΩ over hundreds of mating cycles
Applications
The SFM-143-02-SM-D-LC is deployed in high-density board-to-board interconnect applications such as large FPGA mezzanine cards, multi-channel data acquisition daughterboards, and signal processing modules requiring 86 parallel electrical connections at 0.050" pitch. Its surface mount design with lead coplanarity control makes it suitable for IPC Class 3 high-reliability PCB assemblies in aerospace, defense, and advanced industrial instrumentation. Engineers also use it in multi-board computing systems where a single connector must carry both high-speed digital signals and power distribution across stacked PCB assemblies.
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
How does the 86-position count of SFM-143-02-SM-D-LC support FPGA mezzanine interface designs?
The SFM-143-02-SM-D-LC's 86 positions at 0.050" (1.27 mm) pitch can simultaneously carry 80 or more user I/O signals alongside dedicated power and ground pins in a footprint approximately 54.6 mm long (43 positions × 1.27 mm). This density is well matched to mid-range FPGA devices with 64 to 80 GPIO pins, enabling a single-connector mezzanine interface without the routing complexity of using multiple smaller connectors.
Why is the LC (Lead Coplanarity) feature critical for IPC Class 3 assembly of the SFM-143-02-SM-D-LC?
IPC Class 3 high-reliability assemblies require all SMT component leads to maintain coplanarity within ±0.10 mm to guarantee that every lead contacts its pad during solder reflow. The SFM-143-02-SM-D-LC's LC specification ensures all 86 contacts satisfy this requirement, preventing opens in any of the 86 solder joints during the reflow oven pass. Without LC control, manufacturing variation across a connector this long could produce height deviations exceeding 0.15 mm, which would cause cold or open joints at the ends of the strip.
What mated stack height options are available when pairing SFM-143-02-SM-D-LC with a SAMTEC plug header?
The SFM-143-02-SM-D-LC mates with SAMTEC's SFM or TFM plug headers at 0.050" (1.27 mm) pitch. SAMTEC offers mating headers in multiple above-board heights typically spanning from 4 mm to 11 mm, translating to total mated board-to-board stack heights between approximately 5 mm and 13 mm when combined with the socket's own PCB standoff. This range covers most compact embedded module stack requirements in aerospace and industrial computing.
Is SFM-143-02-SM-D-LC a cost-effective alternative to FMC (FPGA Mezzanine Card) standard connectors for prototype boards?
The SFM-143-02-SM-D-LC can serve as a lower-cost alternative to VITA 57 FMC standard connectors in prototype settings where FMC compliance is not required. A single SFM-143-02-SM-D-LC provides 86 positions at a unit price significantly below that of FMC high-pin-count connectors rated for the same 10+ Gbps signal speeds. However, FMC connectors are required for VITA 57-compliant carrier boards, so the SFM series is best suited for custom non-standard mezzanine interfaces in early-stage development.
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