SFM-121-T2-S-D-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-T2-S-D-K-TR is a 42-position dual-row high-reliability surface-mount socket strip with 1.27 mm (0.050") pitch and gold-plated contacts. Designed for fine-pitch mezzanine and daughter-card connections. From $3.50 in stock, worldwide shipping available.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-T2-S-D-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-121-T2-S-D-K-TR?
- 42-position dual-row layout on 1.27 mm (0.050") pitch enabling fine-pitch, high-density mezzanine board connections
- High-reliability socket strip construction with gold-plated contacts rated for extended mating cycle life
- Keyed (K suffix) alignment prevents mismating in multi-connector PCB assemblies
- Tape-and-reel (TR) packaging for automated SMT pick-and-place assembly line production
What is SFM-121-T2-S-D-K-TR used for?
The SFM-121-T2-S-D-K-TR is designed for mezzanine board stacking and daughter-card interfaces in space-constrained applications like embedded computing modules, RF systems, and industrial SBCs where 42 signals must cross a fine-pitch 0.050" board-to-board interface. The keyed housing ensures correct mating orientation in systems with multiple identical connectors, critical in complex multi-board assemblies. Its high-reliability rating makes it well suited for defense, aerospace, and industrial equipment.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-121-T2-S-D-K-TR datasheet?
SFM-121-T2-S-D-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-121-T2-S-D-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 0.050" pitch of SFM-121-T2-S-D-K-TR compare to standard 0.100" pitch connectors for a compact PCB stack design?
The SFM-121-T2-S-D-K-TR uses a 1.27 mm (0.050") pitch, which is half the spacing of standard 2.54 mm (0.100") pitch connectors. This finer pitch allows a 42-position dual-row socket to fit in roughly half the board space of an equivalent 0.100" pitch connector, enabling more compact mezzanine stacking in space-constrained PCB designs.
What does the K suffix on SFM-121-T2-S-D-K-TR indicate, and when is it particularly important?
The K suffix designates a keyed connector with a mechanical polarization feature that prevents incorrect mating. This is critical in multi-connector assemblies where two or more SFM connectors of the same size are placed close together, as keying ensures each connector mates with its correct counterpart and avoids pin misalignment or signal cross-connection errors during board assembly or field replacement.
For a defense electronics application requiring long connector service life, is SFM-121-T2-S-D-K-TR a reliable choice?
Yes, the SFM-121-T2-S-D-K-TR is designated as a high-reliability socket strip, which SAMTEC designs for extended mating cycle durability with gold-plated contacts. Gold plating maintains low contact resistance over hundreds of mating cycles and resists corrosion in harsh environments, making this connector suitable for defense and aerospace applications that demand long service intervals.
How many signals can SFM-121-T2-S-D-K-TR carry, and how is its dual-row layout structured?
The SFM-121-T2-S-D-K-TR carries 42 signals in a dual-row socket configuration, with 21 pins per row on a 1.27 mm pitch. This dual-row layout reduces the connector's length compared to a single-row 42-position alternative, allowing more efficient use of PCB real estate in constrained board areas.
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