SFM-137-L2-S-D-A-K SAMTEC Connector (Other) In Stock
SFM-137-L2-S-D-A-K is a SAMTEC 74-position dual-row high-reliability socket strip at 0.050" (1.27 mm) pitch with surface-mount termination, gold-plated contacts rated for 1 A per pin, and keying option for polarized board-to-board mating. From $8.50 in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- SFM-137-L2-S-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 74-position dual-row socket at 0.050" (1.27 mm) pitch offering high-density board-to-board connectivity with 37 contacts per row in a compact surface-mount footprint
- Gold-plated contacts delivering contact resistance below 20 mΩ and minimum 1 A per pin current rating for reliable signal and low-power supply distribution
- Keying feature (-K suffix) preventing incorrect mating orientation and supporting positive-lock engagement over 30+ insertion cycles for high-reliability assembly
Applications
The SFM-137-L2-S-D-A-K is designed for high-density board-to-board signal interconnects in embedded computing modules, FPGA mezzanine cards, and military-grade electronics where the 0.050" pitch dual-row socket format and keyed polarization ensure reliable assembly. Its gold-plated contacts and surface-mount termination make it suitable for compact multi-layer PCBs in industrial data acquisition systems and communication equipment. The high-reliability rating supports use in defense electronics, aerospace payload boards, and high-cycle test fixture interfaces.
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 pin count and row configuration does the SFM-137-L2-S-D-A-K provide?
The SFM-137-L2-S-D-A-K is a 74-position dual-row socket strip with 37 contacts per row at a 0.050" (1.27 mm) pitch. This high-density surface-mount configuration enables board-to-board connections carrying up to 1 A per pin for signal and low-power supply distribution on compact PCBs.
What does the -K suffix on SFM-137-L2-S-D-A-K indicate, and why is it important in production assembly?
The -K suffix denotes a keying feature that mechanically prevents incorrect mating orientation between the SFM socket and its mating header. In production assembly of 74-pin dual-row connectors at 0.050" pitch, this keying prevents reversed insertion damage, reducing rework rates and protecting sensitive ICs connected across the board-to-board interface.
How does the SFM-137 compare to the SFM-139 in terms of pin count for my FPGA mezzanine card design?
The SFM-137-L2-S-D-A-K provides 74 positions (37 per row) while SFM-139-02-SM-D-A-K offers 78 positions (39 per row), both at 0.050" (1.27 mm) dual-row pitch with gold-plated contacts rated at 1 A per pin. Choose the SFM-137 variant when your FPGA mezzanine interface uses a 74-pin signal map, saving 4 pins of unused connector length and board space.
Can SFM-137-L2-S-D-A-K withstand defense and aerospace vibration environments?
Yes, SAMTEC SFM series high-reliability connectors are rated for harsh environments and support 30+ mating cycles with gold-plated contacts maintaining contact resistance below 20 mΩ. The surface-mount solder termination provides mechanical robustness against vibration loads encountered in aerospace payload boards and defense electronics operating from -55°C to +125°C.
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