SFM-149-02-FM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-149-02-FM-D-LC is a 98-position dual-row surface-mount socket strip with 0.050" (1.27 mm) pitch, engineered for high-density mezzanine and board-to-board interconnect requiring large parallel signal counts in compact SMT assemblies.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 98
- Lifecycle
- ACTIVE
- Datasheet
- SFM-149-02-FM-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-149-02-FM-D-LC?
- 98 positions in a dual-row layout for very high signal count board-to-board interfaces
- 0.050" (1.27 mm) pitch providing compact footprint for dense PCB designs
- FM (flush-mount) lead style for low-profile SMT termination
- High-reliability socket construction maintaining stable contact in multi-layer mezzanine stacks
- 02 row spacing variant for specific board-to-board stack heights in system designs
What is SFM-149-02-FM-D-LC used for?
The SFM-149-02-FM-D-LC is designed for high-density mezzanine interconnect in FPGA systems, networking line cards, and embedded server platforms where 98 parallel signals must be reliably transferred between stacked PCBs. Its dual-row 0.050" pitch layout maximizes signal density while minimizing connector footprint, making it ideal for multi-board assemblies with tight spatial budgets. This part is also used in high-speed digital backplanes and military-grade computing modules requiring robust board-to-board signal integrity.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-149-02-FM-D-LC datasheet?
SFM-149-02-FM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-149-02-FM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the contact pitch and total pin count of the SFM-149-02-FM-D-LC, and how does this benefit high-density designs?
The SFM-149-02-FM-D-LC provides 98 contacts in a dual-row layout at 0.050" (1.27 mm) pitch, with 49 contacts per row. This high-density arrangement enables routing up to 98 signal or power lines within a connector footprint approximately 62 mm long, conserving board space compared to 0.100" pitch alternatives.
What does the FM (flush-mount) lead style mean for PCB assembly of the SFM-149-02-FM-D-LC?
The FM lead style means the connector mounts flush against the PCB surface with minimal standoff, typically less than 1 mm. This low-profile SMT termination reduces the overall board stack height in mezzanine assemblies and ensures stable coplanarity across all 98 solder pads during reflow at temperatures up to 260°C.
How is the SFM-149-02-FM-D-LC used in FPGA-based system designs with high I/O counts?
In FPGA daughtercard systems, this 98-position connector can carry 49 differential signal pairs or 98 single-ended I/O lines between the FPGA board and a carrier or backplane, supporting data buses operating at frequencies above 100 MHz. The 0.050" pitch keeps the connector compact enough to fit alongside other board-edge components in high-density FPGA PCB layouts.
How does the SFM-149-02-FM-D-LC differ from the SFM-149-L2-FM-D-LC, and which should be chosen for specific stack heights?
The 02 row spacing variant of the SFM-149-02-FM-D-LC is optimized for a specific board-to-board mating height, typically 2 mm, while the L2 variant offers a different lead length for taller stack heights of approximately 4 mm. Selecting 02 versus L2 depends on the vertical clearance between the two PCBs in the mezzanine assembly.
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