SFM-109-L2-S-D-A-K-TR SAMTEC Connector (Other) In Stock
SFM-109-L2-S-D-A-K-TR is an 18-position dual-row high-reliability surface-mount socket strip from SAMTEC with 0.050-inch pitch. It provides high-density board-to-board connectivity with gold-plated contacts for superior signal integrity in demanding applications. Available from stock worldwide in tape-and-reel packaging for automated SMT assembly.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- SFM-109-L2-S-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 18-position dual-row SMT socket at 0.050-inch (1.27 mm) pitch achieving 36 contacts in the board space a standard 0.100-inch 18-position connector would occupy
- High-reliability (L2) contact rating designed for extended mating cycles with gold-plated contacts maintaining low resistance below 20 mOhm over thousands of insertions
- Tape-and-reel (TR) packaging with polarized keying (K) feature preventing reversed mating in automated and field assembly of dual-row 0.050-inch pitch interconnects
Applications
The SFM-109-L2-S-D-A-K-TR is engineered for high-density mezzanine card, daughterboard, and FMC module interconnect applications in defense electronics, telecom line cards, and high-performance computing platforms. Its 0.050-inch pitch dual-row socket provides 18 positions in a compact SMT footprint suitable for blade servers, FPGA evaluation boards, and RF signal processing modules. System designers rely on the keyed housing to prevent mis-mating during hot-swap module replacement in field-deployed rack systems operating at speeds above 3 Gbps per channel.
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 keying mechanism does the SFM-109-L2-S-D-A-K-TR use to prevent mis-mating in field assembly?
The -K suffix indicates a physical polarization key integrated into the 0.050-inch pitch dual-row socket housing, which mechanically blocks reversed or offset header pins from engaging, eliminating reversed-polarity mating damage across all 18 positions in field-replacement scenarios for mezzanine cards and plug-in modules in rack-mounted equipment.
How does the L2 high-reliability rating of the SFM-109-L2-S-D-A-K-TR benefit applications requiring repeated daughtercard removal?
The L2 high-reliability contact specification uses enhanced spring geometry and gold plating on contact surfaces to maintain stable resistance below 20 mOhm through a minimum of 500 mating cycles, compared to standard connectors rated for 30 to 100 cycles, making the SFM-109-L2-S-D-A-K-TR the correct choice for field-replaceable modules removed multiple times per year over a 10-year service life.
For a 3 Gbps serial link on a plug-in card, how does the SFM-109-L2-S-D-A-K-TR's 0.050-inch pitch affect signal integrity compared to 0.100-inch alternatives?
At 0.050-inch (1.27 mm) pitch the SFM-109-L2-S-D-A-K-TR reduces stub length and parasitic capacitance per contact to under 0.2 pF, enabling signal propagation at 3 Gbps to 10 Gbps per channel with lower insertion loss than 0.100-inch connectors whose longer contact beam geometry introduces additional capacitance that degrades eye diagram margins at multi-gigabit data rates.
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