SFM-121-T2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-T2-STL-D-A-K is a 42-position dual-row high-reliability surface mount socket strip on 1.27 mm (0.050 inch) pitch, ideal for fine-pitch mezzanine and daughtercard connections in compact high-density PCB designs.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-T2-STL-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42-position dual-row surface mount socket strip on 1.27 mm (0.050 inch) pitch for fine-pitch mezzanine interconnects
- High-reliability construction supporting frequent mating cycles in rugged aerospace and defense applications
- Surface mount (STL) termination for automated reflow soldering compatibility with fine-pitch SMT footprints
Applications
The SFM-121-T2-STL-D-A-K is used in aerospace avionics, defense electronics, and high-density embedded computing modules that require a reliable 42-pin dual-row socket at 0.050 inch pitch. Its fine-pitch SMT footprint supports high signal density while minimizing board area consumption in space-constrained assemblies.
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
What configuration does the SFM-121-T2-STL-D-A-K offer and what is its contact pitch?
The SFM-121-T2-STL-D-A-K provides 42 positions in a dual-row (2 rows of 21) socket strip on a 1.27 mm (0.050 inch) pitch. This fine pitch enables high-density PCB routing and is mating-compatible with SAMTEC TSM and TFM series headers at the same 0.050 inch spacing.
How does the SFM-121-T2-STL-D-A-K differ from SFM-122-L2-FM-D-A-K in terms of pin count and target use case?
The SFM-121 provides 42 positions versus 44 positions on the SFM-122, both at 1.27 mm (0.050 inch) pitch in a dual-row SMT socket format. The 2-pin difference makes SFM-121 suitable for designs requiring 42 signals where the mating header footprint dictates 21 pins per row rather than 22.
For a rugged avionics module, how many mating cycles can the SFM-121-T2-STL-D-A-K typically support compared to standard commercial sockets?
SAMTEC SFM high-reliability socket strips are designed for a minimum of 100 mating cycles, well above the 30 to 50 cycle rating of typical low-cost commercial SMT sockets, making them appropriate for field-maintainable avionics and defense modules where boards are swapped regularly during service intervals.
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