SFM-126-L2-H-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-126-L2-H-D-A-K is a 52-position dual-row high-reliability socket strip at 1.27 mm (0.050 inch) pitch with surface mount termination and gold-plated contacts, built for dense fine-pitch mezzanine card interconnects.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 52
- Lifecycle
- ACTIVE
- Datasheet
- SFM-126-L2-H-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 52-position dual-row configuration at 1.27 mm pitch provides 26 differential pair capacity in a compact SMT footprint
- High-reliability SFM series socket construction with gold-plated contacts for consistent signal integrity across thousands of mating cycles
- L2 solder tail style optimized for surface mount reflow soldering, eliminating through-hole PCB requirements
- Compatible with SAMTEC TSM series 1.27 mm pin headers for reliable mezzanine and daughterboard connections
Applications
The SFM-126-L2-H-D-A-K is engineered for high-density mezzanine card, daughterboard, and FMC-compatible socket interconnect applications in FPGA evaluation boards, high-speed data acquisition modules, and embedded computing systems where 52 fine-pitch contacts are required. Its 1.27 mm pitch accommodates 26 differential pairs in a surface mount footprint roughly half the size of equivalent 2.54 mm connectors. The gold-plated contacts and high-reliability construction make it suitable for aerospace, defense, and industrial instrumentation applications demanding long service life.
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 does the 1.27 mm pitch of SFM-126-L2-H-D-A-K benefit high-speed signal routing compared to 2.54 mm alternatives?
At 1.27 mm pitch, the SFM-126-L2-H-D-A-K doubles the contact density relative to standard 2.54 mm connectors, accommodating 26 differential pairs in the same board area that a 26-pin 2.54 mm connector would occupy. This reduced pitch also lowers inter-pin capacitance, supporting signal transmission at frequencies beyond 1 GHz with lower crosstalk.
What mating connector is designed for use with the SFM-126-L2-H-D-A-K socket strip?
The SFM-126-L2-H-D-A-K mates with SAMTEC TSM-series or compatible 1.27 mm pitch dual-row pin headers. The mating connector must have a 26-position-per-row arrangement matching the 52-pin SFM socket, and the gold-to-gold mating contact resistance is typically less than 20 milliohms per contact.
In what way is the SFM-126-L2-H-D-A-K different from the SFM-123-T2-H-D-A-K and when should each be chosen?
The SFM-126 has 52 positions (26 per row) versus the SFM-123's 46 positions (23 per row), and uses an L2 solder tail versus T2, which differs in lead geometry for specific PCB land patterns. Designers choose SFM-126 when 6 more signal lines are needed, or when the L2 footprint aligns better with the target PCB layout constraints.
What operating temperature range is typical for SAMTEC SFM-series connectors like SFM-126-L2-H-D-A-K?
SAMTEC SFM-series high-reliability connectors are typically rated for operating temperatures from -55°C to +125°C, making them suitable for industrial, aerospace, and defense applications subject to wide ambient temperature swings and thermal cycling stresses.
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.”