SFM-145-02-LM-D-A-P SAMTEC Connector (Other) In Stock
SAMTEC SFM-145-02-LM-D-A-P is a 90-position dual-row high-reliability surface-mount socket strip at 0.050-inch (1.27 mm) pitch, with low-inductance LM contacts, A-style polarization, and P board-lock posts for secure SMT assembly. Available with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 90
- Lifecycle
- ACTIVE
- Datasheet
- SFM-145-02-LM-D-A-P Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-145-02-LM-D-A-P?
- 90 positions in a dual-row 0.050-inch (1.27 mm) pitch layout delivering high contact density for FPGA mezzanine, SerDes breakout, and high-channel-count board-to-board interconnects
- Low-inductance LM contact geometry minimizes signal path inductance, improving signal integrity for high-speed differential pairs and sub-nanosecond rise-time signals
- A-style polarization key prevents mismating in assemblies with multiple adjacent 0.050-inch connectors sharing the same row spacing
- P board-lock posts mechanically anchor the connector to the PCB during reflow at 260 °C, preventing misalignment across all 90 positions on the fine 1.27 mm pitch
- High-reliability socket contacts with gold plating ensure stable contact resistance below 20 mΩ and 500+ mating cycle durability for field-serviceable module designs
What is SFM-145-02-LM-D-A-P used for?
The SFM-145-02-LM-D-A-P is used in high-speed FPGA mezzanine cards, RF transceiver modules, and radar signal processing boards where 90 positions at 0.050-inch pitch provide maximum I/O density without exceeding connector zone area budgets. Its low-inductance LM contacts preserve signal integrity for multi-gigabit-per-second SerDes lanes and high-speed parallel buses operating at hundreds of megahertz. The A polarization and P board-lock options together ensure correct and stable connector seating during automated SMT assembly in defense, aerospace, and high-performance embedded computing applications.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-145-02-LM-D-A-P datasheet?
SFM-145-02-LM-D-A-P Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-145-02-LM-D-A-P?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the LM designation mean in SFM-145-02-LM-D-A-P and how does it improve signal performance?
LM in the SAMTEC SFM part number designates a low-mass, low-inductance contact design that reduces parasitic inductance in each signal pin. Lower pin inductance—typically below 1 nH per contact—decreases signal reflection and crosstalk at high frequencies, making SFM-145-02-LM-D-A-P suitable for differential signals operating above 1 GHz, including LVDS, MIPI, and multi-gigabit SerDes lanes in FPGA mezzanine and radar signal processing applications.
What role does the P board-lock post play in SFM-145-02-LM-D-A-P assembly?
The P board-lock posts press-fit into corresponding holes in the PCB before soldering, holding the 90-position socket body flat and aligned on the 0.050-inch (1.27 mm) pitch pads during reflow. Without board-lock retention, the buoyancy forces from molten solder paste during the 260 °C peak reflow cycle can shift a high pin-count connector by several tenths of a millimeter—enough to bridge pads at 1.27 mm pitch. The P posts eliminate this risk and also provide mechanical retention against mating forces after soldering.
How many mating cycles is SFM-145-02-LM-D-A-P rated for?
SAMTEC SFM series high-reliability socket strips are rated for a minimum of 500 mating cycles, with gold-plated contacts maintaining contact resistance below 20 mΩ throughout the connector's service life. This rating supports applications requiring repeated module removal and replacement, such as hot-spare embedded computing blades, test-fixture interfaces for burn-in testing, and field-replaceable FPGA mezzanine modules in telecom and industrial systems.
What pin count and pitch does SFM-145-02-LM-D-A-P provide, and which header families mate with it?
The SFM-145-02-LM-D-A-P has 90 positions arranged as 2×45 rows at 0.050-inch (1.27 mm) pitch. It mates with SAMTEC TFM, TSM, or SSW series headers at the matching 0.050-inch dual-row 45-per-row pitch, such as TFM-145-xx-x-D or TSM-145-xx-x-D variants. Stack heights from approximately 4 mm to 20 mm are available depending on the selected mating header, accommodating different board-to-board separation requirements in mezzanine and stacked PCB assemblies.
What is the A polarization style in SFM-145-02-LM-D-A-P and when is it required?
The A-style polarization in SFM-145-02-LM-D-A-P is a mechanical keying feature that creates an asymmetric profile on one end of the connector body, ensuring the socket can only mate with a correspondingly keyed header in the correct orientation. This is particularly important in dense backplane designs where multiple 90-position dual-row connectors sit within a few millimeters of each other, as it prevents board damage from a rotated or wrong-row mating attempt during system assembly or module hot-swap.
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