TSM-128-02-SS-DH-A-K-TR SAMTEC Connector (Other) In Stock
The TSM-128-02-SS-DH-A-K-TR is a 56-position dual-row surface-mount terminal strip from SAMTEC with a 0.100" (2.54 mm) pitch and solder-shoulder (SS) termination for enhanced mechanical stability. Its dual-in-line header format and tape-and-reel packaging support high-volume SMT assembly in industrial, embedded computing, and telecommunications board interconnect applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-128-02-SS-DH-A-K-TR?
- 56 positions in dual-row layout at 0.100" (2.54 mm) pitch for high-density signal and power routing
- Solder-shoulder (SS) termination providing additional solder joint area and improved mechanical strength versus standard SMT pins
- Surface-mount dual-in-line header (DH) format compatible with standard 0.100" female receptacles and sockets
- Tape-and-reel (-TR) packaging enabling automated pick-and-place assembly on high-volume SMT production lines
- SAMTEC TSM series reliability with consistent contact finish for stable low-resistance connections across all 56 positions
What is TSM-128-02-SS-DH-A-K-TR used for?
The TSM-128-02-SS-DH-A-K-TR is suited for dual-row board interconnects in embedded single-board computers, industrial I/O expansion modules, and communications backplanes where 56-pin connectivity at 0.100" pitch with enhanced solder shoulder retention is specified. Its SMT solder-shoulder design improves resistance to mechanical vibration and thermal cycling stress, making it a reliable choice for industrial control panels and instrumentation equipment that demand long-term connector integrity.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-128-02-SS-DH-A-K-TR datasheet?
TSM-128-02-SS-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-128-02-SS-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the solder-shoulder (SS) termination on TSM-128-02-SS-DH-A-K-TR improve mechanical robustness over a standard SMT pin?
The solder-shoulder feature adds a widened pad contact area at the base of each pin, increasing the total solder fillet volume across all 56 positions. This distributes peel and shear forces over a larger joint area, improving resistance to mechanical shock events of 50 G or greater and thermal cycling between -40°C and +85°C compared to standard-footprint SMT pins that rely on a smaller solder fillet.
What is the maximum current per pin engineers should budget when using TSM-128-02-SS-DH-A-K-TR for mixed signal and power applications?
SAMTEC TSM series contacts at 0.100" (2.54 mm) pitch are rated at approximately 1 A per pin for signal-level currents. For power rails within the 56-position connector, designers typically gang 4 to 6 adjacent pins in parallel to carry 4 A to 6 A continuous, keeping individual pin dissipation within the connector's thermal limits and avoiding excessive voltage drop across the contact resistance of approximately 20 mΩ per pin.
How does TSM-128-02-SS-DH-A-K-TR differ from TSM-128-04-STL-DH-P-TR in terms of lead style and keying for board selection?
TSM-128-02-SS-DH-A-K-TR uses a solder-shoulder (SS) straight vertical SMT lead without polarized keying, while TSM-128-04-STL-DH-P-TR offers a short-tail lead (STL) with polarized (-P) keying. Designers select the SS version when they rely on PCB silkscreen orientation markers and prefer a larger solder joint area for mechanical strength, whereas the STL polarized version is chosen on multi-connector boards where assembly error prevention across 56 positions outweighs the smaller solder joint trade-off.
For a high-volume production run of 10,000 boards, how does tape-and-reel packaging on TSM-128-02-SS-DH-A-K-TR reduce assembly line cost?
Tape-and-reel (-TR) delivery feeds TSM-128-02-SS-DH-A-K-TR directly into automated SMT pick-and-place machines without any manual de-traying or singulation step, saving approximately 5 to 10 seconds per board in operator handling time. At 10,000 boards, this accumulates to 14 to 28 hours of saved labor, and the consistent component orientation on the reel eliminates the 0° versus 180° placement errors that occur when connectors are supplied loose in bags or antistatic tubes.
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