SFM-145-L2-FM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC SFM-145-L2-FM-D-LC is a 90-position dual-row high-reliability surface-mount socket strip with 0.050 inch (1.27 mm) pitch, designed for high-density board-to-board and mezzanine connections. Available from stock worldwide with fast shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 90
- Lifecycle
- ACTIVE
- Datasheet
- SFM-145-L2-FM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 90 positions (45 per row) in dual-row 0.050 inch pitch configuration for high-density interconnects
- Surface-mount termination with low-clearance FM (flush mount) profile for compact PCB stacking
- High-reliability construction suitable for mil-aero, instrumentation, and rugged embedded systems
- LC (lead-free compatible) finish ensuring RoHS compliance and compatibility with lead-free soldering processes
Applications
The SFM-145-L2-FM-D-LC is designed for high-density board-to-board mezzanine stacking applications in instruments, embedded computing modules, and RF systems requiring 90 contacts in a compact 0.050 inch pitch footprint. Its flush-mount surface-mount profile is ideal for low-profile daughter-card assemblies and FPGA mezzanine card (FMC) designs where board-to-board spacing is tightly constrained.
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 positions and rows does the SFM-145-L2-FM-D-LC provide, and what is its contact pitch?
The SFM-145-L2-FM-D-LC provides 90 total positions arranged in 2 rows of 45 contacts each, with a 0.050 inch (1.27 mm) pitch. This dual-row, fine-pitch design enables very high contact density in a compact footprint, making it ideal for data acquisition cards, FPGA mezzanine boards, and embedded modules where board space is limited.
Is SFM-145-L2-FM-D-LC RoHS compliant, and what does the LC suffix indicate about its finish?
Yes, the LC suffix in SFM-145-L2-FM-D-LC denotes a lead-free compatible plating finish, ensuring full RoHS compliance for environmentally restricted applications. The contacts are typically plated with gold over nickel to provide low contact resistance, typically under 20 milliohms, and corrosion resistance suitable for industrial and high-reliability environments.
What stacking height does the L2 designation indicate, and how does it affect mezzanine card design?
The L2 designation in the SFM-145-L2-FM-D-LC indicates a specific post length variant providing a defined mating height, typically in the range of 2 mm to 8 mm above the PCB surface for mezzanine stack configurations. Designers use this stack height to determine the clearance envelope between two PCBs, which is critical for heat dissipation, component clearance, and mechanical alignment in multi-board embedded systems.
In which applications is the SFM-145-L2-FM-D-LC a suitable alternative to high-pin-count FMC or mezzanine connectors?
The SFM-145-L2-FM-D-LC is a strong candidate in applications that require 90 pins at 1.27 mm pitch with surface-mount attachment, including FPGA mezzanine cards (FMC), software-defined radio daughterboards, test-and-measurement backplanes, and industrial control expansion modules. At 45 pins per row over a dual-row layout, it can replace higher-cost high-speed connectors in lower-bandwidth signal routing tasks where signal integrity requirements allow 0.050 inch pitch spacing.
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