TFC-139-02-FM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC TFC-139-02-FM-D-A-K is a 78-position Tiger Eye Cost-Effective Terminal Strip with 0.050" (1.27 mm) pitch and female-male dual-row contacts, offering high-density board interconnect for advanced embedded and industrial systems.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TFC-139-02-FM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row FM (female-male) configuration at 0.050" (1.27 mm) pitch supports 39 circuits per row in a compact connector body
- Tiger Eye dual-beam contacts maintain contact resistance below 20 mΩ over 200+ mating cycles for long-term signal reliability
- Cost-effective Tiger Eye terminal strip design lowers per-circuit cost at volume without sacrificing mating durability or electrical performance
Applications
The TFC-139-02-FM-D-A-K is applied in high-channel embedded computing boards, FPGA mezzanine modules, and industrial I/O expansion cards requiring 78 reliable signal paths within a minimal PCB footprint. The 1.27 mm pitch female-male dual-row layout provides board-to-board connectivity at reduced stack height compared to discrete pin headers, making it attractive for compact backplane and daughter-card assemblies. Its Tiger Eye contact reliability makes it dependable across the full industrial temperature range.
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 circuits per row does the TFC-139-02-FM-D-A-K provide and what is the overall connector body length?
The TFC-139-02-FM-D-A-K provides 39 circuits per row across its dual-row layout for a total of 78 positions, all at a 0.050 inch (1.27 mm) pitch. The resulting connector body measures approximately 65 mm in length, fitting within the standard keepout zones of compact PCB designs while delivering a high circuit count. This makes it one of the densest options in the SAMTEC TFC series for applications requiring 78-circuit board-to-board interconnect.
For an FPGA mezzanine card needing 78 general-purpose I/O lines, how does the TFC-139-02-FM-D-A-K compare to a traditional 2.54 mm pitch alternative?
The TFC-139-02-FM-D-A-K at 1.27 mm pitch fits all 78 I/O lines into a connector body about 65 mm long, whereas a standard 2.54 mm pitch dual-row header for the same 78 circuits would extend to approximately 130 mm — twice the board space. Tiger Eye contacts also provide more consistent mating force than simple stamped pins, keeping contact resistance under 20 mΩ even after repeated module swaps, which is important for FPGA development platforms that may be reconfigured dozens of times.
What procurement factors should engineers consider when sourcing the TFC-139-02-FM-D-A-K for a high-volume industrial product?
Engineers sourcing the TFC-139-02-FM-D-A-K for high-volume production should confirm availability through authorized SAMTEC distributors, verify the -A-K suffixes confirming plating and packaging options, and request pricing at 1,000-piece and 10,000-piece breaks to confirm the cost-effective positioning of the TFC series. Lead times for standard TFC variants are typically 4 to 8 weeks from distributor stock, but 78-position configurations may require factory orders with 12-week lead times, so early procurement planning covering at least 6 months of safety stock is recommended.
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