SFM-145-L2-SM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC SFM-145-L2-SM-D-A-K is a 90-position dual-row high-reliability surface-mount socket strip with 0.050 inch pitch and side-mount termination. Compact SMT profile suits dense multi-signal boards. Available from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 90
- Lifecycle
- ACTIVE
- Datasheet
- SFM-145-L2-SM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 90-position dual-row configuration at 0.050 inch (1.27 mm) pitch provides 45 contacts per row for high-density board-to-board signal routing
- Side-mount (SM) SMT termination style enables soldering along the board edge, ideal for space-constrained daughtercard and mezzanine designs
- High-reliability socket construction with polarization key prevents mis-mating in automated assembly, ensuring correct orientation across all 90 positions
Applications
The SFM-145-L2-SM-D-A-K is designed for high-density mezzanine card and daughterboard connections in telecommunications, industrial control, and embedded computing systems that require 90 signal lines in a minimal PCB footprint. The side-mount termination style allows board-edge placement, which supports chassis designs where connectors must be accessible from the side of a stacked assembly. Its 0.050 inch pitch and dual-row layout support high-speed differential and single-ended signals in data acquisition and FPGA prototyping platforms.
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 is the contact pitch of the SFM-145-L2-SM-D-A-K and how does it affect routing density on a 4-layer PCB?
The SFM-145-L2-SM-D-A-K uses a 0.050 inch (1.27 mm) contact pitch with 45 positions per row. On a standard 4-layer PCB with 0.1 mm trace widths and 0.1 mm spacing, all 90 signals can be routed within a 60 mm board width, roughly half the routing area needed by equivalent 0.100 inch pitch connectors, enabling tighter component placement across the rest of the board.
When should an engineer choose SFM-145-L2-SM-D-A-K over SFM-146-02-LM-D-A-K for a mezzanine application?
Choose the SFM-145-L2-SM-D-A-K when the mezzanine board must connect at the side edge of the main board, because its SM (side-mount) termination places the solder tails perpendicular to the mating direction. The SFM-146-02-LM-D-A-K uses a low-mount vertical style instead. The 90-position count versus 92 also means you have 2 fewer signals, so confirm your signal count before selecting.
How does the polarization key on the SFM-145-L2-SM-D-A-K prevent assembly errors in high-volume production?
The -A-K suffix on the SFM-145-L2-SM-D-A-K denotes polarization and keying features built into the connector housing. The key physically blocks insertion at 180 degrees, preventing reversed mating that would short all 90 signal pairs simultaneously. In high-volume SMT lines running at 2000 boards per day, this mechanical keying eliminates the need for vision-system polarity checks on every board, reducing takt time by several seconds per unit.
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