SFM-137-02-STL-D-A-K SAMTEC Connector (Other) In Stock
SFM-137-02-STL-D-A-K is a 74-position dual-row high-reliability surface mount socket strip from SAMTEC operating at 0.050" (1.27mm) pitch with gold-plated contacts rated at 1A per pin. Features a solder-tail-less (STL) design for direct board-to-board mating with controlled stack height. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- SFM-137-02-STL-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 strip at 0.050" (1.27mm) pitch delivers high signal density for compact mezzanine and board-to-board stacking configurations
- Solder-tail-less (STL) construction enables direct surface mount mating with precise controlled stack height, simplifying board-to-board assembly in space-constrained enclosures
- Gold-plated high-reliability contacts maintain stable electrical continuity through thousands of mating cycles, meeting the demands of industrial, aerospace, and defense applications
Applications
The SFM-137-02-STL-D-A-K is used in mezzanine card and module interconnect designs for aerospace avionics, military electronics, and high-performance computing where 74-pin dual-row capacity at 0.050" pitch with controlled stack height is required. Its solder-tail-less design allows precise board separation and mating force control, making it ideal for field-replaceable module interfaces in ruggedized systems. Medical instrumentation and test equipment manufacturers also specify this socket strip for daughterboard interfaces requiring repeatable contact resistance under vibration.
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 contact positions does the SFM-137-02-STL-D-A-K offer, and what is the contact pitch?
The SFM-137-02-STL-D-A-K features 74 contacts in a dual-row layout at 0.050" (1.27mm) pitch, with 37 positions per row. This high-density arrangement allows a large number of signal and power connections across a narrow board edge in compact mezzanine and stacked PCB designs.
What does the STL suffix mean in SFM-137-02-STL-D-A-K, and how does it affect assembly?
The STL suffix designates a solder-tail-less termination style, meaning the socket mounts directly without conventional solder tails protruding through or onto the PCB. This allows the connector to establish board-to-board contact at a precisely controlled stack height, typically within ±0.5mm tolerance, which is critical for RF shielding enclosure fits and conformal coating clearances.
What current rating does each contact pin carry in the SFM-137-02-STL-D-A-K?
Each contact in the SFM-137-02-STL-D-A-K is rated at 1A. With 74 total pins, designers can dedicate 6 or more pins per power rail to handle 6A or higher currents while routing dozens of signal lines on the remaining contacts, providing full flexibility for mixed power-and-signal mezzanine board interfaces.
In what rugged application environments is SFM-137-02-STL-D-A-K preferred over a standard 0.100" pitch socket strip?
In aerospace, defense, and industrial control environments where PCB real estate is constrained and vibration resistance is mandatory, the SFM-137-02-STL-D-A-K at 0.050" pitch provides twice the contact density of 0.100" alternatives in the same linear board space. Its gold-plated high-reliability contacts maintain electrical continuity through thousands of mating cycles and exposure to temperature extremes from -55°C to +125°C.
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