SFM-144-T2-LM-D-LC SAMTEC Connector (Other) In Stock
SFM-144-T2-LM-D-LC is an 88-position dual-row high-reliability socket strip from SAMTEC on a 1.27 mm (0.050 inch) pitch with surface-mount termination and locking board mount. Gold-plated contacts support 100+ mating cycles for demanding mezzanine and daughter card interconnect.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 88
- Lifecycle
- ACTIVE
- Datasheet
- SFM-144-T2-LM-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-144-T2-LM-D-LC?
- 88-position dual-row socket on 1.27 mm pitch achieving twice the signal density of 2.54 mm alternatives in the same PCB edge length
- High-reliability construction with gold-plated contacts rated for 100+ mating cycles and contact resistance below 30 mΩ
- Locking board mount (LC) retention preventing accidental connector separation under mechanical shock or vibration
- Surface-mount reflow compatible up to 260°C for single-pass lead-free PCB assembly
- Low-profile SMT socket design enabling reduced stack height in compact mezzanine and module form factors
What is SFM-144-T2-LM-D-LC used for?
The SFM-144-T2-LM-D-LC is used in high-density mezzanine module applications such as FMC daughter cards, FPGA carrier boards, and embedded computing modules where 88 signals are routed at 1.27 mm pitch with mechanical locking. Its high-reliability socket construction suits avionics line-replaceable units, mil-spec computing modules, and industrial automation I/O cards that require guaranteed mating cycle life and vibration resistance. The surface-mount format enables single-pass reflow assembly for volume PCB manufacturing in telecommunications and defense electronics.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-144-T2-LM-D-LC datasheet?
SFM-144-T2-LM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-144-T2-LM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the locking board mount (LC) feature on the SFM-144-T2-LM-D-LC improve connector retention compared to a non-locking variant?
The LC locking board mount adds mechanical retention posts at each end of the 88-position socket housing that engage mating notches or PCB cutouts, preventing the connector from sliding or rotating relative to the board under vibration profiles such as MIL-STD-810 random vibration at 5 g rms. Without the locks, the 1.27 mm pitch solder joints alone resist lateral forces, but under repeated shock events the joints can fatigue; the LC mount transfers these forces into the PCB substrate and reduces joint stress by an estimated 60 to 80 percent.
What mating cycle life does the SFM-144-T2-LM-D-LC support and what contact plating achieves this?
The SFM-144-T2-LM-D-LC is rated for a minimum of 100 mating cycles with gold-plated contacts maintaining contact resistance below 30 mΩ throughout. Gold is specified because it resists fretting corrosion at the 1.27 mm pitch contact interface, where even minor sliding motions during thermal expansion cycles would rapidly degrade tin-plated contacts, causing intermittent opens on high-speed digital signals routed through the 88-position socket.
How many signals does the SFM-144-T2-LM-D-LC accommodate and what is the PCB footprint length at 1.27 mm pitch?
The SFM-144-T2-LM-D-LC accommodates 88 signals in a dual-row arrangement of 44 contacts per row at 1.27 mm pitch, spanning a row length of approximately 56 mm (44 x 1.27 mm). The dual-row layout adds a second row offset at 1.27 mm, so the total connector body footprint is roughly 58 x 5 mm, not including the locking board mount posts at each end, which extend the keep-out zone to approximately 65 mm.
In what aerospace or defense applications is the SFM-144-T2-LM-D-LC typically specified?
The SFM-144-T2-LM-D-LC is typically specified in 3U VPX and 6U VME avionics computing modules, mission computer I/O expansion cards, and radar signal processing daughter boards where 88 signals must be routed at 1.27 mm pitch with guaranteed retention under 20 g shock and 5 g rms vibration. Its gold contacts and locking mount meet the electrical and mechanical requirements of DO-160G and MIL-STD-810 qualification tests commonly required for airborne electronics.
What reflow profile is the SFM-144-T2-LM-D-LC qualified for and how does this affect PCB assembly scheduling?
The SFM-144-T2-LM-D-LC is qualified for lead-free reflow up to 260°C peak temperature per J-STD-020, allowing it to be soldered in the same oven pass as all other SMT components on the carrier board. This eliminates the need for a separate low-temperature soldering step and reduces PCB assembly cycle time by one full oven pass per board, which at volumes of 1000 boards translates to several hours of saved production line time.
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