TFM-139-12-LM-D-A-P-TR SAMTEC Connector (Other) In Stock
SAMTEC TFM-139-12-LM-D-A-P-TR is a high-reliability Tiger Eye dual-row terminal strip with 0.050 inch pitch, 78 positions, low-profile male contacts, and tape-and-reel packaging for precise board stacking and mezzanine card interconnection in compact high-density electronics.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TFM-139-12-LM-D-A-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFM-139-12-LM-D-A-P-TR?
- Dual-row 78-position Tiger Eye terminal strip at 0.050 inch (1.27 mm) pitch providing high-density board stacking capability in a compact 1.95 inch footprint
- Low-profile male (LM) contact design minimizes stacking height overhead while maintaining secure mechanical engagement with mating Tiger Eye socket strips
- Tape-and-reel (TR) packaging enables automated SMT pick-and-place assembly for volume production of mezzanine cards and embedded computing boards
What is TFM-139-12-LM-D-A-P-TR used for?
The TFM-139-12-LM-D-A-P-TR is suited for low-profile mezzanine card interconnections in embedded computing platforms, FPGA acceleration boards, and compact telecommunications modules where stacking height must be minimized below 3 mm. Its dual-row 78-position layout on a 0.050 inch pitch ensures high signal density for parallel bus, differential pair, and mixed signal routing between stacked PCBs. The Tiger Eye contact system provides reliable wiping engagement that maintains signal integrity across extended temperature cycling in industrial and defense applications.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TFM-139-12-LM-D-A-P-TR datasheet?
TFM-139-12-LM-D-A-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFM-139-12-LM-D-A-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What stacking height does the low-profile male contact on the TFM-139-12-LM-D-A-P-TR enable?
The LM (low-profile male) contact designation on the TFM-139-12-LM-D-A-P-TR is designed for reduced stack heights, typically enabling board-to-board mating gaps of 2 mm to 4 mm when paired with the corresponding Tiger Eye socket strip. This makes it the preferred choice for slim embedded modules where vertical space budgets restrict stacking to under 5 mm.
How does the Tiger Eye contact system in the TFM-139-12-LM-D-A-P-TR improve signal integrity compared to standard socket strips?
SAMTEC's Tiger Eye contact geometry uses a precision-formed dual-wipe engagement that scrubs contact surfaces during insertion across the 78-position interface, removing oxidation films that cause increased contact resistance. This results in stable contact resistance below 20 mΩ per pin, supporting high-speed differential signals at multi-GHz data rates on mezzanine cards in FPGA and networking applications.
In a cost-constrained design needing 78 dual-row positions at 0.050 inch pitch, when is the TFM-139-12-LM-D-A-P-TR the right selection?
The TFM-139-12-LM-D-A-P-TR is the right selection when the design requires a low-profile male terminal strip in a tape-and-reel format for automated SMT assembly, mating with a 78-position 0.050 inch pitch Tiger Eye socket strip at a stack height under 5 mm. It becomes cost-effective for batch sizes above 500 units where the tape-and-reel handling reduces per-board connector placement cost by 30% to 50% compared to tray-packaged alternatives.
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