SFM-109-T2-FM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-109-T2-FM-D-LC is an 18-position dual-row high-reliability socket strip with 1.27 mm (0.050 inch) pitch in surface-mount configuration. It incorporates a floating mount mechanism and low-clearance profile, designed for dense board-to-board mating in compact electronic assemblies.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- SFM-109-T2-FM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SFM-109-T2-FM-D-LC?
- 18-position dual-row socket strip on 1.27 mm (0.050 inch) pitch for high-density surface-mount board-to-board connections
- Floating mount (-FM) design absorbs PCB-to-PCB alignment tolerances up to ±0.5 mm to prevent solder joint stress during mating
- Low-clearance (-LC) profile minimizes the mated stack height, enabling ultra-thin product designs where board separation is critical
What is SFM-109-T2-FM-D-LC used for?
The SFM-109-T2-FM-D-LC is designed for high-reliability board-to-board interconnects in aerospace, defense, and industrial computing modules where a low mated stack height and tolerance compensation are essential. Its 18-position dual-row layout provides 18 signal or power contacts in a compact 1.27 mm pitch footprint, making it suitable for daughtercard-to-mainboard connections in ruggedized embedded systems. The floating mount feature is particularly valuable in multi-connector backplane assemblies where simultaneous blind-mate engagement of several connectors is required.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the SFM-109-T2-FM-D-LC datasheet?
SFM-109-T2-FM-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for SFM-109-T2-FM-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the floating mount feature of the SFM-109-T2-FM-D-LC protect solder joints during repeated mating cycles?
The floating mount allows the connector housing to shift laterally by up to ±0.5 mm relative to its PCB footprint during mating. This compliance absorbs PCB-to-PCB misalignment without transmitting side-load stress to the surface-mount solder joints, significantly extending joint fatigue life in assemblies that are mated and de-mated frequently, such as field-replaceable modules.
What advantage does the low-clearance (-LC) option offer in stackable PCB module designs?
The -LC (low-clearance) variant reduces the mated board-to-board separation compared to standard SFM configurations, enabling PCB stack heights well under 10 mm. This is critical in compact embedded computing modules, wearable medical devices, and portable instruments where every millimeter of height reduction matters for enclosure fit.
Which high-speed signal standards can the SFM-109-T2-FM-D-LC carry at 1.27 mm pitch?
At 1.27 mm pitch, the SFM series socket strips support differential pair routing at data rates of several Gbps per pair. They are characterised for signals including USB 3.0 (5 Gbps) and LVDS differential pairs operating at hundreds of MHz, with contact impedance nominally near 50 ohms to maintain signal integrity across the 18 positions.
How many mating cycles is the SFM-109-T2-FM-D-LC rated for, and what does that mean for module serviceability?
SAMTEC high-reliability SFM socket strips are typically rated for a minimum of 30 mating cycles under standard test conditions, which is adequate for replaceable daughtercard modules serviced a few times per year over a 10-year product lifespan. For applications requiring higher cycling, gold-plated contact options extend reliable contact resistance below 20 milliohms across many more insertion events.
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