SFM-123-T2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-123-T2-STL-D-A-K is a 46-position dual-row high-reliability socket strip at 0.050" pitch with straddle-mount surface mount termination, designed for compact high-density board-to-board connections in demanding applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- SFM-123-T2-STL-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 layout at 0.050 inch (1.27 mm) pitch achieves high contact density in a compact SMT footprint for fine-pitch board-to-board designs
- Straddle-mount (STL) termination style allows the connector to straddle the PCB edge, enabling efficient signal breakout and direct board-edge mating
- High-reliability socket strip construction ensures consistent low-resistance contact across 46 positions for medical, aerospace, and industrial applications
Applications
The SFM-123-T2-STL-D-A-K is used in high-density mezzanine and module-on-board interconnects for FPGA carrier cards, RF front-end modules, and aerospace avionics where 46 contacts at 0.050 inch pitch are needed in minimal PCB space. Its straddle-mount termination enables compact PCB edge connections, making it well suited for daughtercard designs in embedded computing and high-speed digital systems. The high-reliability design targets medical device boards and defense electronics requiring stable contact resistance over thousands of mating cycles.
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 contacts does the SFM-123-T2-STL-D-A-K support and at what pitch?
The SFM-123-T2-STL-D-A-K provides 46 positions arranged in a dual-row configuration at a fine 0.050 inch (1.27 mm) pitch, giving 23 contacts per row. This compact pitch allows designers to place 46 signal connections in a footprint area roughly equivalent to a 23-position 0.100 inch pitch connector, dramatically increasing routing density on small PCBs.
What does the straddle-mount (STL) termination mean for the PCB layout of SFM-123-T2-STL-D-A-K?
The STL (straddle-mount) termination style means the connector body straddles the edge of the PCB, with solder tails extending to pads on both the top and bottom surfaces of the board. This allows a very thin board-edge profile ideal for compact daughtercard designs and module connectors where a through-hole or standard SMT footprint would add too much height above the PCB surface.
For which high-reliability markets is the SFM-123-T2-STL-D-A-K specifically designed?
SAMTEC's SFM high-reliability series targets aerospace avionics, defense electronics, and medical device applications where the 46-position connector must maintain low contact resistance and stable mating force across thousands of cycles and wide temperature ranges. The dual-row 0.050 inch pitch design supports dense signal routing in space-constrained form factors such as small form factor (SFF) modules and military embedded computing cards.
What is the advantage of choosing SFM-123-T2-STL-D-A-K over a standard SMT socket strip in an FPGA mezzanine design?
For FPGA mezzanine designs using VITA 57.1 or similar standards, the straddle-mount style of SFM-123-T2-STL-D-A-K reduces the connector height profile versus raised through-hole options, freeing vertical clearance for heatsinks or shields above the mezzanine board. With 46 positions at 0.050 inch pitch, it also routes more signals per unit board edge length compared to a 0.100 inch pitch alternative, enabling higher I/O density on compact FMC or XMC mezzanine cards.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”