TFC-139-02-LM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC TFC-139-02-LM-D-A-K is a 78-position Tiger Eye dual-row terminal strip at 0.050" (1.27 mm) pitch with long machined tails and kinked pins for secure PCB placement. Cost-effective design with gold-plated contacts suits high-density signal routing applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TFC-139-02-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78 positions at 0.050" (1.27 mm) pitch in a dual-row arrangement provides high contact density for compact PCB designs
- Long machined (-LM) tails enable precise through-hole placement and support wire-wrap or press-fit termination options
- Kinked tail (-K) design ensures positive PCB registration and prevents connector shift during automated assembly processes
Applications
The TFC-139-02-LM-D-A-K serves high-density through-hole interconnection needs on embedded computing cards, industrial controller boards, and data acquisition modules routing 78 signals in a 1.27 mm dual-row footprint. Long machined tails provide extra insertion length for secure solder joints or alternative wire-wrap termination in prototyping environments. The kinked pin design improves alignment in automated PCB assembly, reducing placement defects in volume production.
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 does the LM suffix mean on the SAMTEC TFC-139-02-LM-D-A-K and how does it affect assembly?
The LM suffix denotes long machined tails. Long tails extend further through the PCB, providing additional pin length of approximately 0.230" for more robust solder joints or enabling wire-wrap termination. Machined contacts maintain tighter dimensional tolerances than stamped tails, improving alignment accuracy during board assembly.
How does the 78-pin TFC-139-02-LM-D-A-K compare in density to 50-pin connectors at the same pitch?
At 0.050" (1.27 mm) pitch, the TFC-139-02-LM-D-A-K routes 78 signals in a dual-row footprint approximately 1.950" long, versus a 50-pin connector at about 1.250". This 56% increase in pin count within a proportionally larger footprint helps consolidate signal interfaces and reduce the number of separate connectors on high-channel boards.
Which industries commonly procure the SAMTEC TFC-139-02-LM-D-A-K for high-density signal interconnects?
Telecom equipment manufacturers, industrial automation companies, and defense electronics suppliers commonly use the TFC-139-02-LM-D-A-K for 78-pin dual-row 1.27 mm pitch interconnects. Each pin supports 1 A and the Tiger Eye contacts deliver reliable low-resistance mating, meeting the stringent reliability standards of these industries.
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