SFM-121-L2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-121-L2-STL-D-A-K is a 42-position, dual-row, 0.050" pitch high-reliability surface mount socket strip connector. Features gold-plated contacts and a compact SMT footprint for dense signal interconnection in demanding applications. Available from authorized global distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- SFM-121-L2-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 0.050" (1.27 mm) pitch for high-density signal routing across board interfaces
- Gold-plated contacts providing low contact resistance and reliable mating in harsh environments
- Surface mount (SMT) termination compatible with automated reflow assembly at up to 260°C
- High-reliability construction suitable for industrial, medical, and instrumentation applications
Applications
The SFM-121-L2-STL-D-A-K serves as a high-density board-to-board interconnect in embedded computing modules, industrial control systems, and test instrumentation where 42 signal positions must be reliably routed across a 0.050" pitch dual-row interface. Its SMT design integrates into automated production lines, and the gold-plated contact finish supports long-term signal integrity in applications with frequent mating cycles. Engineers select this connector for multi-channel data acquisition systems and communication boards where space constraints limit the use of wider pitch alternatives.
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 positions and what pitch does the SFM-121-L2-STL-D-A-K provide?
The SFM-121-L2-STL-D-A-K offers 42 positions in a dual-row layout on a 0.050" (1.27 mm) pitch, providing a compact board interface spanning approximately 26.67 mm in row length. This makes it suitable for high-density designs where dozens of signals must cross a board boundary within a small PCB area.
For which types of industrial or embedded applications is the SFM-121-L2-STL-D-A-K a strong choice?
The SFM-121-L2-STL-D-A-K is an excellent fit for industrial automation controllers, multi-channel sensor interfaces, and embedded computing expansion boards requiring 42 signal connections at 0.050" pitch. The gold-plated contacts ensure contact resistance below 20 mΩ over hundreds of mating cycles, providing signal integrity in demanding factory floor environments.
What is the difference between SFM-121-L2-STL-D-A-K and SFM-123-02-STL-D-A-K in terms of pin count?
The SFM-121-L2-STL-D-A-K provides 42 positions while the SFM-123-02-STL-D-A-K provides 46 positions, both on a 0.050" (1.27 mm) pitch dual-row layout. Designers choose between them based on signal count requirements: 42 positions cover up to 21 differential pairs, while 46 positions accommodate 23 differential pairs, both within the same SAMTEC SFM high-reliability series.
Can the SFM-121-L2-STL-D-A-K be used in automated SMT production, and what reflow profile does it support?
Yes, the SFM-121-L2-STL-D-A-K is designed for surface mount assembly and is compatible with standard lead-free reflow profiles reaching 260°C peak temperature. Its SMT footprint and dual-row 42-position layout are optimized for pick-and-place equipment, enabling consistent, high-throughput production on modern automated assembly lines.
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