SFM-149-T2-SM-D-A SAMTEC Connector (Other) In Stock
SAMTEC SFM-149-T2-SM-D-A is a 98-position, dual-row, high-reliability SMT socket strip at 0.050-inch (1.27mm) pitch for dense board-to-board interconnects. Gold-plated contacts and SMT termination enable reflow assembly with consistent signal integrity across all 98 positions. Stocked globally for prototype and high-volume production requirements.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 98
- Lifecycle
- ACTIVE
- Datasheet
- SFM-149-T2-SM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 98 positions in dual-row 0.050-inch (1.27mm) pitch for ultra-high-density board-to-board socket connections in mezzanine card assemblies
- High-reliability gold-plated contacts rated for 500+ mating cycles with stable contact resistance below 30mΩ
- Surface-mount termination (SM) compatible with standard reflow soldering at up to 260°C peak temperature
- T2 tail length and A-suffix contact style optimized for solder wetting and co-planarity on fine-pitch SMT PCB pads
Applications
The SFM-149-T2-SM-D-A is used in high-pin-count mezzanine card assemblies, FPGA-to-processor carrier boards, and multi-chip module interfaces where 98 signal lines must pass between PCBs within a 1.27mm pitch constraint. Its 0.050-inch pitch and dual-row layout suit advanced telecom line cards, radar signal processor boards, and industrial motion controller daughtercards requiring dense parallel buses and differential signal pairs. The high-reliability gold contacts ensure signal integrity across vibration and thermal cycling in defense, aerospace, and test-and-measurement enclosures.
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 does the 0.050-inch pitch of the SFM-149-T2-SM-D-A enable higher pin density than 0.100-inch alternatives on the same PCB edge?
At 1.27mm (0.050-inch) pitch, the SFM-149-T2-SM-D-A fits 98 positions in approximately 62mm of board length. An equivalent 0.100-inch pitch connector would require 124mm to accommodate the same 98 contacts, consuming twice the PCB edge space. This 50% length reduction is critical in 3U VPX and compact mezzanine card form factors where available connector zones are under 80mm.
For an FPGA development board with 96 user I/O signals, how does the SFM-149-T2-SM-D-A compare to using two 48-position connectors?
A single SFM-149-T2-SM-D-A with 98 positions handles all 96 FPGA I/O lines plus 2 power or ground pins in one connector, saving 1 connector footprint and eliminating the 2mm gap and skew mismatch between two 48-position strips. A single 98-position SMT connector at 1.27mm pitch also achieves tighter differential pair length matching, keeping skew under 10ps for multi-gigabit LVDS signals.
What is the mating cycle rating of the SFM-149-T2-SM-D-A and which use cases require this durability?
The SFM-149-T2-SM-D-A is rated for at least 500 mating cycles with gold-plated contacts maintaining under 30mΩ contact resistance throughout the rated life. This durability is required in test fixtures, lab breadboard prototypes, and field-replaceable line cards that are routinely unplugged and reseated during bring-up, debug, and periodic maintenance over a 5-10 year equipment service life.
What reflow profile is recommended for soldering the SFM-149-T2-SM-D-A's 98 SMT pads without connector warpage?
The SFM-149-T2-SM-D-A's surface-mount pads should be reflowed using a profile with a peak temperature of 245-260°C for no more than 30 seconds above 217°C per J-STD-020. Because the connector body spans approximately 62mm, a PCB warpage limit of 0.3mm over the connector length is critical to achieve simultaneous solder joint formation across all 98 positions without bridging or open joints at the row ends.
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