SFM-121-T2-STL-D-A-K-TR SAMTEC Connector (Other) In Stock
The SFM-121-T2-STL-D-A-K-TR is a high-reliability dual-row surface-mount socket strip from SAMTEC with 42 positions on a 0.050-inch (1.27 mm) pitch, supplied in tape-and-reel format for automated PCB assembly.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42-position dual-row configuration at 0.050-inch (1.27 mm) pitch for high-density board-to-board signal routing
- Tape-and-reel (TR) packaging enabling automated pick-and-place SMT assembly for high-volume production
- High-reliability SAMTEC SFM series construction for demanding industrial, telecom, and defense interconnect requirements
Applications
The SFM-121-T2-STL-D-A-K-TR is used in compact mezzanine board stacking applications where 42 signal connections must be made in a minimal footprint at 0.050-inch pitch. It suits industrial control modules, telecom line cards, and embedded compute boards that require reliable, repeatable surface-mount socket connectivity. The tape-and-reel packaging streamlines high-volume SMT production lines, reducing handling time and improving placement accuracy.
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 contact positions does SFM-121-T2-STL-D-A-K-TR provide, and on what pitch?
The SFM-121-T2-STL-D-A-K-TR provides 42 positions in a dual-row layout on a 0.050-inch (1.27 mm) pitch. This results in 21 contacts per row, giving designers a compact 42-pin socket that occupies approximately 1.05 inches of board length.
What does the TR suffix indicate, and how does it affect manufacturing workflow?
The TR suffix denotes tape-and-reel packaging, meaning connectors are individually loaded onto carrier tape for automated pick-and-place SMT assembly. This format supports reel quantities typically of 500 or more units, improving throughput and reducing manual handling on high-volume production lines.
For a compact industrial control PCB, why choose the dual-row SFM-121-T2-STL-D-A-K-TR over a single-row 42-position alternative?
A dual-row configuration at 0.050-inch pitch packs 42 contacts into roughly half the board-edge length of a single-row equivalent, freeing PCB real estate for additional circuitry. This is critical in industrial control modules and embedded compute cards where width constraints limit connector length to under 30 mm.
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.”