TFM-139-03-H-D-LC SAMTEC Connector (Other) In Stock
SAMTEC TFM-139-03-H-D-LC is a high-reliability Tiger Eye dual-row terminal strip at 0.050" pitch, 78 positions, with high-performance contacts and low-clearance design for compact stacked board assemblies. From $3.20 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TFM-139-03-H-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFM-139-03-H-D-LC?
- 78-position dual-row 0.050" pitch Tiger Eye strip delivering high contact density for complex signal and power routing in a compact SMT footprint
- Low-clearance (LC) design minimizes the inter-board gap to the lowest possible stack height, essential for densely packed server or telecom blade assemblies
- High-performance (H) contact option provides enhanced current capacity and reduced contact resistance compared to standard Tiger Eye configurations
What is TFM-139-03-H-D-LC used for?
The TFM-139-03-H-D-LC is designed for high-density interconnect applications in network switches, server blades, and multi-channel data acquisition systems where 78 signals must be routed through a single compact 0.050" pitch connector. Its low-clearance design is optimized for tightly stacked board assemblies typical of 1U and 2U rack-mount equipment where inter-board spacing is less than 10 mm. The high-performance contact option ensures reliable signal integrity across all 78 positions in environments with thermal cycling.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TFM-139-03-H-D-LC datasheet?
TFM-139-03-H-D-LC Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFM-139-03-H-D-LC?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the significance of the high-performance (H) contact option in the TFM-139-03-H-D-LC?
The high-performance (H) designation indicates enhanced contact design with lower contact resistance and higher current-carrying capacity than standard Tiger Eye contacts. In a 78-position dual-row connector, even a small reduction in contact resistance—such as from 30 milliohms to 15 milliohms—can meaningfully reduce power dissipation across high-current signal rails.
How does the low-clearance (LC) feature of the TFM-139-03-H-D-LC benefit tightly stacked PCB assemblies?
The LC designation reduces the height of the connector above the PCB surface, allowing mated boards to be stacked closer together—sometimes achieving inter-board gaps as small as 4 mm to 6 mm. This is essential in 1U rack-mount servers and telecommunications blades where total chassis height limits available vertical space.
For a 78-position interconnect requirement, when should a designer choose TFM-139-03-H-D-LC over two separate lower-position connectors?
A single 78-position TFM-139-03-H-D-LC is preferred when PCB routing requires all signals to cross a single board boundary at one location, reducing impedance discontinuities. Using one connector instead of two also cuts assembly placement steps in half and eliminates the risk of one connector being misaligned while the other is correctly seated.
Which procurement considerations apply when buying the TFM-139-03-H-D-LC in production quantities?
The TFM-139-03-H-D-LC is available in tape-and-reel or cut-strip formats from authorized SAMTEC distributors. Lead times for standard stock are typically under 2 weeks, but the 78-position high-performance variant may require 4 to 6 weeks for larger volume orders. Confirming RoHS compliance and MSL rating is recommended before finalizing the BOM.
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About SAMTEC
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