TSM-139-02-TM-DV-P-TR SAMTEC Connector (Other) In Stock
The Samtec TSM-139-02-TM-DV-P-TR is a 78-position dual-row 2.54 mm (0.100 inch) pitch surface-mount terminal strip with gold-plated contacts and tape-and-reel packaging for automated assembly. It provides a high-pin-count interconnection in a compact SMT footprint for data buses, power distribution, and mixed signal routing. Available from stock worldwide with standard lead-free construction.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 78
- Lifecycle
- ACTIVE
- Datasheet
- TSM-139-02-TM-DV-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-139-02-TM-DV-P-TR?
- 78 positions in a dual-row 2.54 mm (0.100 inch) pitch layout for high-density surface-mount board-to-board or wire-to-board interconnection
- Gold-plated (TM designation) contacts provide low, stable contact resistance and extended mating life for demanding signal integrity requirements
- Tape-and-reel (TR) packaging enables seamless integration with high-volume automated pick-and-place SMT assembly
- Surface-mount termination compatible with standard reflow soldering profiles up to 260 °C
What is TSM-139-02-TM-DV-P-TR used for?
The TSM-139-02-TM-DV-P-TR suits high-pin-count board-to-board and cable-to-board interconnection in computing backplanes, industrial control cards, and test equipment PCBs where a 78-position 2.54 mm pitch header is required. Its dual-row arrangement allows 39 signals per row, supporting parallel data buses, mixed power and signal harnesses, or backplane edge connections in a single connector body. The tape-and-reel format and SMT termination enable efficient integration into automated assembly lines for volume production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-139-02-TM-DV-P-TR datasheet?
TSM-139-02-TM-DV-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-139-02-TM-DV-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many positions and rows does TSM-139-02-TM-DV-P-TR provide and what is the contact pitch?
The TSM-139-02-TM-DV-P-TR provides 78 positions arranged in 2 rows at a 2.54 mm (0.100 inch) pitch, giving 39 contacts per row. The 2.54 mm pitch is the industry-standard 0.100 inch grid, ensuring broad compatibility with mating cable connectors, IDC ribbon assemblies, and discrete wire harnesses. The 78-position count accommodates 64-bit data buses plus power and control signals within a single connector footprint.
What contact plating does the TM designation in TSM-139-02-TM-DV-P-TR specify and how does it affect performance?
The TM designation in the part number specifies a gold contact finish, typically 15 µin to 30 µin gold over nickel underplate. Gold plating keeps contact resistance below 30 milliohms per position across the 78 contacts, resists oxidation in humid or contaminated environments, and maintains reliable electrical performance over hundreds of mating cycles. This is especially important for low-level signal lines and data bus interfaces where increased contact resistance would cause signal integrity degradation.
Is TSM-139-02-TM-DV-P-TR compatible with automated SMT reflow assembly, and what packaging does it ship in?
Yes. The TSM-139-02-TM-DV-P-TR uses surface-mount termination compatible with reflow soldering at up to 260 °C peak temperature per IPC J-STD-020. It ships in tape-and-reel (TR) format, compatible with standard pick-and-place equipment for SMT production. The dual-row body length for 78 positions is approximately 99 mm, so the pick-and-place program must account for the full body extents when placing the connector on the PCB.
When would a designer choose TSM-139-02-TM-DV-P-TR over a shorter TSM-series variant like TSM-120-02?
A designer selects the 78-position TSM-139 over a 40-position TSM-120 when the interface requires more than 40 signals, such as a 64-bit memory bus (64 data + 8 ECC bits + 6 control lines = 78 signals) that must fit in a single connector slot on a backplane. Using a single 78-position connector instead of two smaller connectors reduces PCB routing complexity, eliminates connector-to-connector skew on high-speed parallel buses, and simplifies the cable harness assembly with one mating connector instead of two.
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