SFM-121-L2-F-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-L2-F-D-A-P-TR is a 42-position, dual-row, 0.050" pitch surface-mount socket strip with right-angle termination and polarization feature. The 2x21 layout in tape-and-reel packaging enables reliable high-density daughter card connections in automated SMT assembly.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-L2-F-D-A-P-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-L2-F-D-A-P-TR?
- 42-position dual-row 2x21 layout at 0.050" (1.27 mm) pitch supports 42 independent signal lines in a compact SMT body for high-density PCB designs
- Polarization (P) feature provides physical keying to prevent incorrect 180-degree mating, reducing assembly defects in production environments
- Tape-and-reel packaging enables high-throughput automated pick-and-place assembly for cost-effective volume manufacturing
What is SFM-121-L2-F-D-A-P-TR used for?
The SFM-121-L2-F-D-A-P-TR is designed for high-density mezzanine and daughter card interconnects in embedded systems, industrial control modules, and signal processing boards where 42 signal positions are needed at 0.050" pitch. Its polarization feature makes it a reliable choice for field-replaceable module connections and production-line assembly where mating errors must be systematically prevented across all 42 channels.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-121-L2-F-D-A-P-TR datasheet?
SFM-121-L2-F-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-121-L2-F-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many signal positions does SFM-121-L2-F-D-A-P-TR support and what is the dual-row layout?
The SFM-121-L2-F-D-A-P-TR provides 42 total signal positions in a dual-row 2x21 configuration at 0.050" (1.27 mm) pitch, enabling 42 independent signal connections in a compact surface-mount body approximately 26 mm in length.
How does the polarization feature of SFM-121-L2-F-D-A-P-TR prevent assembly errors in high-volume manufacturing?
The polarization (P) feature in SFM-121-L2-F-D-A-P-TR creates an asymmetric mechanical key that blocks 180-degree misalignment during mating. In high-volume PCB assembly lines handling hundreds of boards per day, this prevents pin-1 reversal errors that could damage 42 signal traces or connected ICs, significantly reducing rework costs.
When should a designer choose SFM-121-L2-F-D-A-P-TR over the 40-position SFM-120 variant for an industrial control module?
A designer should select SFM-121-L2-F-D-A-P-TR over SFM-120 when the signal budget requires more than 40 lines—for example, when routing a 32-bit data bus plus 10 control signals totaling 42 lines—since SFM-121 provides exactly 42 positions at 0.050" pitch without adding a second connector or wasting available contacts.
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