TFM-139-12-STL-D-A-P-TR SAMTEC Connector (Other) In Stock
The SAMTEC TFM-139-12-STL-D-A-P-TR is a high-reliability Tiger Eye dual-row terminal strip with 0.050" pitch and 78 positions, featuring straight-through-hole mounting, polarization, and tape-and-reel packaging for automated assembly. Available with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFM-139-12-STL-D-A-P-TR?
- Tiger Eye dual-beam contacts at 0.050" pitch provide redundant electrical paths across 78 positions for reliable signal integrity in high-cycle mating applications
- Straight-through-hole (STL) mounting variant offers enhanced mechanical retention and vibration resistance compared to surface mount alternatives at the same 0.050" pitch
- Tape-and-reel (TR) packaging with polarization keying (P) supports automated assembly and prevents connector mis-orientation during high-volume production
What is TFM-139-12-STL-D-A-P-TR used for?
The TFM-139-12-STL-D-A-P-TR is suited for high-density signal interconnections in telecommunications line cards, aerospace avionics modules, and high-performance computing boards where 78 signals must pass through a compact 0.050" pitch dual-row interface with strong mechanical retention. Its through-hole mounting with Tiger Eye contacts makes it particularly effective in vibration-prone environments where surface mount solder joints alone may not provide sufficient mechanical anchoring.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TFM-139-12-STL-D-A-P-TR datasheet?
TFM-139-12-STL-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFM-139-12-STL-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
For a vibration-intensive aerospace application, why is the through-hole mounting of TFM-139-12-STL-D-A-P-TR advantageous over SMT versions?
Through-hole mounting of TFM-139-12-STL-D-A-P-TR creates solder joints that extend through the PCB thickness and grip plated through-holes, providing mechanical retention far superior to surface mount solder pads alone. In aerospace environments where vibration levels can exceed 10 G across 78 signal positions, this through-hole anchoring prevents connector lift-off and maintains contact alignment that an equivalent surface mount connector at 0.050" pitch might lose under sustained vibration loads.
How does the 78-position count of TFM-139-12-STL-D-A-P-TR fit into a dual-row 0.050" pitch footprint for PCB routing?
With 78 positions arranged in 2 rows of 39 pins each at 0.050" pitch, TFM-139-12-STL-D-A-P-TR spans approximately 1.95 inches in the row direction. This compact footprint routes 78 differential pairs or single-ended signals through a fraction of the board edge that a 0.100" pitch connector would require for the same pin count, freeing board area for adjacent components in telecom line card and FPGA mezzanine designs.
When evaluating TFM-139-12-STL-D-A-P-TR against TFM-147-12-STL-D-A-P-TR, which design scenario favors the 78-position variant?
TFM-139-12-STL-D-A-P-TR with 78 positions suits interface standards requiring fewer than 94 signal lines, such as certain VITA or JEDEC board-to-board interfaces, where using TFM-147-12-STL-D-A-P-TR's 94 positions would leave 16 pins unused and increase connector cost unnecessarily. Selecting the 78-position variant also reduces the soldering area by approximately 17% compared to the 94-position version at the same 0.050" pitch, which can improve yield in fine-pitch wave-solder processes.
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