SFM-123-T2-LM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-123-T2-LM-D-A-K is a 46-position dual-row high-reliability socket strip with 0.050" (1.27 mm) pitch in a surface mount package and low-profile mating height. Designed for dense board-to-board signal mating in compact embedded, test, and communications equipment. In stock globally for immediate shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-T2-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 46-position dual-row socket at 0.050" (1.27 mm) pitch enabling high pin-count mating in a compact SMT footprint
- Low-profile 'LM' mating height minimizes above-board stack height for slim dual-PCB assemblies
- High-reliability SFM series rated for consistent contact force across repeated mating cycles in demanding environments
Applications
The SFM-123-T2-LM-D-A-K is used in high-density embedded computing modules, communications daughterboards, and test fixture interfaces requiring 46-pin connectivity at 0.050" pitch with minimal board height. Its dual-row fine-pitch socket construction suits stacked PCB designs in rack-mount telecom equipment and data acquisition systems. The high-reliability rating supports applications where the connector is mated and unmated multiple times during board assembly, testing, or field maintenance.
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 many signals per row does SFM-123-T2-LM-D-A-K accommodate at its 0.050" pitch?
The SFM-123-T2-LM-D-A-K has 46 total positions in a dual-row arrangement, providing 23 contacts per row at 0.050" (1.27 mm) pitch. The total mated length of the connector is approximately 29.21 mm (23 x 1.27 mm), enabling high-density 46-signal interfaces in a footprint less than 30 mm long.
In a telecom blade card design, what board spacing does SFM-123-T2-LM-D-A-K enforce between two stacked PCBs?
The 'LM' (low-profile mating) designation on SFM-123-T2-LM-D-A-K sets the mated stack height between PCBs at approximately 8 mm or less, depending on the mating header height. Telecom blade cards using this connector series typically achieve board-to-board spacing of 8 mm to 10 mm, which is significantly less than the 15 mm to 20 mm spacing required by standard-pitch connectors with equivalent pin counts.
What mating connector from SAMTEC is compatible with SFM-123-T2-LM-D-A-K?
The SFM-123-T2-LM-D-A-K mates with SAMTEC TFM or TSM series pin headers at 0.050" (1.27 mm) pitch in the matching 46-position, dual-row configuration. The 'D' in the part number indicates a dual-row layout compatible with standard SAMTEC 0.050" pitch headers, and the mated pair achieves a normal contact force typically between 30 g and 100 g per pin for reliable signal continuity.
How does the 46-position SFM-123 compare to SFM-103 (6-position) for high-speed serial vs. parallel bus applications?
SFM-103 with only 6 positions suits narrow serial interfaces like SPI (4 signals), I2C (2-wire), or UART (2 to 4 signals) where fewer than 8 pins are needed. SFM-123 with 46 positions is required for wide parallel buses, multi-channel ADC or DAC interfaces, or high-speed LVDS pairs where 40 or more signal lines must cross the connector boundary at 0.050" pitch within a compact SMT area.
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