SFM-139-T2-ZZ-D-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC SFM-139-T2-ZZ-D-A-K-TR is a 78-position dual-row high-reliability SMT socket strip with 0.050 inch pitch, designed for fine-pitch board-to-board mating in compact high-density assemblies. Gold-plated contacts and tape-and-reel packaging support automated production. From $5.20 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- SFM-139-T2-ZZ-D-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row SMT socket strip at 0.050 inch (1.27 mm) pitch delivering 78 independent signal channels in a compact fine-pitch footprint
- High-reliability contact construction with gold-plated finish providing low contact resistance and supporting 500+ mating cycles in demanding environments
- Tape-and-reel (-TR) packaging enabling automated pick-and-place SMT assembly for consistent placement accuracy on high-density boards
Applications
The SFM-139-T2-ZZ-D-A-K-TR is designed for high-density board-to-board signal interconnect in FPGA mezzanine cards, high-speed data acquisition systems, and compact embedded computing modules requiring 78 channels at 0.050 inch pitch. Its dual-row socket strip format mates directly with SAMTEC TFM and TSM series pin headers, enabling reliable signal and power routing between stacked PCBs in telecommunications line cards and defense electronics systems. The SMT footprint and tape-and-reel packaging make it suitable for high-volume automated assembly of server expansion modules and DSP processing boards.
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 signal positions does the SFM-139-T2-ZZ-D-A-K-TR provide and how is the dual-row layout arranged?
The SFM-139-T2-ZZ-D-A-K-TR provides 78 positions arranged in 2 rows of 39 contacts each, on a 0.050 inch (1.27 mm) pitch. The dual-row layout spans approximately 49.5 mm of board length, offering one of the highest pin counts available at this pitch in a single SMT socket strip for dense signal interconnect applications.
What mating connector series is compatible with the SFM-139-T2-ZZ-D-A-K-TR for board-to-board stacking applications?
The SFM-139-T2-ZZ-D-A-K-TR mates with SAMTEC TFM and TSM series 0.050 inch pitch male terminal strips, supporting board-to-board stack heights adjustable from 5 mm to 15 mm depending on the mating pin variant selected. This combination is commonly used in VITA 57.1 FMC mezzanine card designs and custom 78-channel high-speed digital interconnects.
When would a designer choose the SFM-139-T2-ZZ-D-A-K-TR over a 0.100 inch pitch connector for the same application?
A designer should choose the SFM-139-T2-ZZ-D-A-K-TR when PCB area is constrained and 78 positions at 0.100 inch pitch would require more than 100 mm of board edge length. At 0.050 inch pitch, the same 78 signals fit in approximately 49.5 mm, saving more than 50 mm of board length. This is critical in blade server designs where PCB width is limited to 100 mm or less.
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