SFM-137-T2-STL-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-137-T2-STL-D-A-K is a 74-position dual-row high-reliability surface-mount socket strip with 0.050 inch pitch, offering precision interconnect performance for high-density module and board stacking applications in industrial and aerospace electronics.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- SFM-137-T2-STL-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-137-T2-STL-D-A-K?
- 74-position dual-row SMT socket with 0.050 inch (1.27 mm) pitch and straddle-mount (STL) termination allows the connector body to straddle a PCB edge, enabling vertical board-to-board mating configurations not possible with standard end-mount sockets
- High-reliability construction with precision-formed contacts maintains contact resistance below 20 milliohms and supports over 500 mating cycles across -55°C to +125°C operating temperature
- Gold-over-nickel contact finish on all 74 dual-row positions ensures stable low-resistance mating with SAMTEC TSM or SSM series square-post headers at up to 1 A per contact and 30 V DC
What is SFM-137-T2-STL-D-A-K used for?
The SFM-137-T2-STL-D-A-K is designed for PCB edge stacking and right-angle board-to-board interconnect in avionics, radar, and industrial computing chassis where the straddle-mount feature allows a daughter card to overhang a motherboard edge while maintaining 74-pin connectivity at 0.050 inch pitch. Its dual-row layout routes differential signal pairs and power rails simultaneously, supporting multi-gigabit LVDS or SSTL interfaces alongside 3.3 V supply lines. The high-reliability socket is suited to defense and industrial applications requiring consistent performance across wide temperature excursions and multi-cycle service life.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-137-T2-STL-D-A-K datasheet?
SFM-137-T2-STL-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-137-T2-STL-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the STL (straddle-mount) feature on the SFM-137-T2-STL-D-A-K enable that a standard SMT socket cannot?
The STL straddle-mount style allows the connector body to mount across the edge of a PCB, with contacts soldering on both the top and bottom surfaces. This enables vertical or right-angle daughter card configurations that overhang the motherboard edge, reducing the total stacked height by up to 3 mm compared to a right-angle header and socket combination in avionics and radar card-cage designs.
How many signal positions does the SFM-137-T2-STL-D-A-K support, and how are they arranged?
The connector provides 74 positions in a dual-row layout at 0.050 inch (1.27 mm) pitch, with 37 contacts per row. This count supports routing 18 differential pairs alongside single-ended signals and power pins simultaneously, making it suitable for LVDS video, SSTL memory interfaces, and mixed-signal industrial I/O buses at supply voltages from 1.8 V to 3.3 V.
What operating temperature range and mating cycle life does the SFM-137-T2-STL-D-A-K offer for aerospace or defense use?
The SFM-137-T2-STL-D-A-K is rated for -55°C to +125°C operating temperature with gold-over-nickel contacts that maintain contact resistance below 20 milliohms throughout that range. The high-reliability socket construction is designed for over 500 mating cycles, meeting requirements for avionics line-replaceable unit (LRU) connectors where field maintenance involves repeated card insertion and removal.
Which SAMTEC header series mates with the SFM-137-T2-STL-D-A-K, and what current rating does each contact support?
The SFM-137-T2-STL-D-A-K mates with SAMTEC TSM and SSM series square-post headers sharing the same 0.050 inch dual-row grid. Each contact is rated for up to 1 A at 30 V DC, meaning the 74-position connector can carry a combined maximum of 74 A if all pins are used for power distribution, or selectively used with 8 power pins delivering 8 A alongside 66 signal positions in mixed power-and-signal designs.
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