SFM-144-02-LM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-144-02-LM-D-LC is an 88-position dual-row high-reliability surface-mount socket strip at 0.050-inch (1.27 mm) pitch, featuring low-inductance LM contacts and an LC low-current signal-optimized profile for dense high-speed mezzanine interconnects. Available with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 88
- Lifecycle
- ACTIVE
- Datasheet
- SFM-144-02-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-144-02-LM-D-LC?
- 88 positions in a dual-row 0.050-inch (1.27 mm) pitch layout providing twice the signal density of 0.100-inch connectors for FPGA, SerDes, and high-channel-count board-to-board applications
- Low-inductance LM contacts minimize per-pin inductance below 1 nH, preserving signal integrity for multi-gigabit differential pairs and high-frequency parallel buses above 1 GHz
- LC (low current) signal-contact profile reduces pin thermal mass, enabling uniform solder joint formation across all 88 positions during 260 °C lead-free reflow
- High-reliability dual-beam socket contacts with gold plating maintain contact resistance below 20 mΩ and achieve 500+ mating cycle durability for field-serviceable module designs
- Compact 0.050-inch pitch body reduces connector PCB footprint by up to 50% versus 0.100-inch alternatives, freeing board area in space-constrained embedded and avionics designs
What is SFM-144-02-LM-D-LC used for?
The SFM-144-02-LM-D-LC is designed for high-density mezzanine interconnects in FPGA development boards, software-defined radio (SDR) platforms, and advanced driver-assistance systems (ADAS) ECUs where 88 signal connections at 0.050-inch pitch minimize PCB real estate consumed by inter-board connectors. Its low-inductance LM contacts support SerDes lanes operating at 6 Gbit/s and above, making it suitable for PCIe, JESD204B, and multi-gigabit ethernet signal routing between stacked boards. The 500-cycle rated contacts also serve test-and-measurement fixtures and hot-swappable compute blades where modules are regularly replaced during system operation.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-144-02-LM-D-LC datasheet?
SFM-144-02-LM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-144-02-LM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the LM contact in SFM-144-02-LM-D-LC improve high-speed signal integrity?
The LM contact in SAMTEC SFM series is a low-mass, low-inductance design that reduces per-pin inductance to below 1 nH per contact. At multi-gigabit data rates—such as 6 Gbit/s PCIe Gen 2 or 12.5 Gbit/s JESD204B—lower pin inductance reduces inductive impedance discontinuities, limiting signal reflections that degrade eye opening. This makes SFM-144-02-LM-D-LC preferable to standard SFM contacts for high-speed SerDes mezzanine boards where eye margin is tight at the receiver.
What is the pin count and pitch of SFM-144-02-LM-D-LC, and which mating headers are compatible?
The SFM-144-02-LM-D-LC has 88 positions arranged as 2×44 rows at 0.050-inch (1.27 mm) pitch. It mates with SAMTEC TFM, TSM, or equivalent 0.050-inch dual-row 44-per-row headers such as TFM-144-xx-x-D or TSM-144-xx-x-D variants. Available mating stack heights range from approximately 4 mm to 20 mm, accommodating different board-to-board spacing requirements in mezzanine and stacked PCB configurations common in embedded computing and telecommunications line cards.
Why choose SFM-144-02-LM-D-LC over a 0.100-inch dual-row socket for the same 88-position requirement?
At 0.050-inch (1.27 mm) pitch, the SFM-144-02-LM-D-LC connector body for 88 positions measures approximately 2.2 inches (55.9 mm) in length. An equivalent 0.100-inch connector for 88 positions would require roughly 4.4 inches (111.8 mm). The 50% reduction in connector footprint length frees significant PCB area in space-constrained designs such as compact FPGA mezzanine cards, avionics LRUs (line replaceable units), and rugged mil-aero electronics where board dimensions are strictly constrained.
What mating cycle life does SFM-144-02-LM-D-LC support in field-serviceable designs?
SAMTEC SFM series high-reliability socket strips are rated for a minimum of 500 mating cycles with contact resistance maintained below 20 mΩ throughout. This mating durability supports field-serviceable embedded module platforms where FPGA or DSP mezzanine cards are periodically replaced during system upgrades or maintenance, test-and-measurement burn-in fixtures that cycle device under test (DUT) boards hundreds of times, and hot-spare blade server configurations with frequent module swap operations.
Is SFM-144-02-LM-D-LC compatible with standard lead-free SMT reflow processes?
Yes. The SFM-144-02-LM-D-LC uses surface-mount terminations fully compatible with standard lead-free reflow soldering profiles with a peak temperature of 260 °C. The LC (low current) contact variant has reduced pin thermal mass compared to power-rated pins, which promotes uniform heat transfer across all 88 solder joints during reflow, reducing the risk of cold joints at the ends of the connector body where thermal gradients can be largest on a 2×44 dual-row array at 1.27 mm pitch.
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