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
Key Features
- 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
Applications
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) |
Alternate & Equivalent Parts
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.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”