TFC-139-02-FM-D-A SAMTEC Connector (Other) In Stock
The TFC-139-02-FM-D-A is a 78-position dual-row Tiger Eye cost-effective terminal strip from Samtec operating at 0.050 inch (1.27 mm) pitch. It features phosphor bronze contacts with gold mating finish for reliable signal connections in high-density board connector applications. Ideal for compact electronics requiring large pin counts in a minimal PCB footprint.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TFC-139-02-FM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 78-position dual-row configuration at 0.050 inch (1.27 mm) pitch delivers very high pin density in a compact PCB footprint
- Tiger Eye cost-effective contact design provides commercial-grade connectivity performance at reduced component cost
- Gold-plated mating contacts over phosphor bronze ensure low contact resistance and reliable signal integrity across all 78 positions
- Dual-row layout supports simultaneous routing of large numbers of digital signals, power, and ground connections on a single connector
Applications
The TFC-139-02-FM-D-A is well-suited for high-density board-to-board interconnects in telecommunications equipment, data acquisition systems, and industrial automation controllers that require a large number of simultaneous signal connections. With 78 positions at 0.050 inch pitch, it enables compact multi-rail connectivity for complex embedded systems and modular expansion cards. The cost-effective Tiger Eye design is optimized for high-volume commercial production where minimizing connector cost per connection is a primary design constraint.
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 positions does the TFC-139-02-FM-D-A have and how are they laid out on the PCB?
The TFC-139-02-FM-D-A features 78 positions arranged in a dual-row configuration with 39 pins per row at 0.050 inch (1.27 mm) pitch. This high pin count within a compact body allows designers to route a large number of signals, power, and ground connections through a single connector in space-constrained PCB designs.
What contact material and mating finish does the TFC-139-02-FM-D-A use for reliable signal connections?
The TFC-139-02-FM-D-A uses phosphor bronze contacts with a gold mating finish. Gold plating provides excellent corrosion resistance and low contact resistance across all 78 mating positions, ensuring consistent signal integrity in commercial electronics environments over the expected service life of the connector.
For which types of electronics systems is the TFC-139-02-FM-D-A most appropriate given its pin count?
With 78 positions at 1.27 mm pitch, the TFC-139-02-FM-D-A is particularly suited to telecommunications line cards, FPGA breakout boards, and industrial I/O expansion modules that must route 60 or more digital signals through a single compact connector. Its dual-row layout fits standard board edge and mid-board mounting configurations.
How does the TFC-139-02-FM-D-A Tiger Eye design compare to premium connector alternatives in terms of mating cycles?
The Tiger Eye cost-effective design on the TFC-139-02-FM-D-A is optimized for commercial applications with typical mating cycle ratings around 30 cycles, which is lower than premium connector lines rated for 100 or more cycles. For applications requiring only infrequent board-level mating during assembly or service, the Tiger Eye design delivers adequate reliability at significantly lower cost per 78-position connector.
Related Guides
How to Choose a Digital Potentiometer: AD5204, AD5206, and AD8403 Selection Guide
Compare the AD5204, AD5206, and AD8403 multi-channel SPI digipots by channel count, resistance value, and package to choose the right Analog Devices digital potentiometer for your design.
Jun 21, 2026
AD7745 / AD7746 / AD7747 Capacitance-to-Digital Converter Design Guide
Complete application note for the AD774x CDC family: circuit design, shielding, conversion rate selection, and sourcing guidance for the AD7745, AD7746, and AD7747.
Jun 21, 2026
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”