TSM-128-01-SS-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-128-01-SS-DH-A-K-TR is a 56-position, single-row, 0.100" pitch surface mount terminal strip with solder seal (SS) contact finish and dual-height body. Keyed for reliable polarized mating and supplied in tape-and-reel format for automated assembly. Available in stock with worldwide shipping.
- 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-128-01-SS-DH-A-K-TR?
- 56 positions single-row 0.100" pitch SMT terminal strip for standard-density board interconnect
- Solder seal (SS) contact finish ensures reliable solder joint integrity with low contact resistance below 20 mΩ
- Dual-height (DH) body offers approximately 8.5 mm elevated clearance to accommodate tall components on stacked PCBs
- Keyed (K) housing prevents incorrect mating orientation in multi-board assemblies and field-service scenarios
What is TSM-128-01-SS-DH-A-K-TR used for?
The TSM-128-01-SS-DH-A-K-TR is designed for industrial automation controllers, embedded computing modules, and measurement instrumentation requiring a high-reliability 56-position single-row interconnect at 0.100" pitch. The solder seal contact finish improves joint strength in high-vibration environments, while the dual-height body supports vertically stacked PCB systems with tall component clearances. Its tape-and-reel packaging integrates seamlessly into automated SMT production lines.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-128-01-SS-DH-A-K-TR datasheet?
TSM-128-01-SS-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-128-01-SS-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the SS (solder seal) contact finish on TSM-128-01-SS-DH-A-K-TR mean for solder joint quality?
The SS solder seal finish pre-applies a controlled solder coating to the contact tails, ensuring uniform wetting during reflow soldering at standard 245°C to 260°C peak temperatures. This finish reduces the incidence of cold joints and bridging across the 56 contact positions, which is especially important in dense SMT layouts where rework is time-consuming. The solder seal coating also improves long-term joint reliability in environments experiencing mechanical shock up to 50 G.
For a 56-pin industrial I/O module, how does the keyed (K) housing prevent costly field wiring errors?
The -K suffix adds a mechanical polarizing key to the connector housing that physically prevents mating with an un-keyed or differently-keyed header, blocking offset or reversed insertions across 56 contacts. In field service where board swap technicians work under time pressure, this key ensures that replacing an I/O module never results in a mis-seated connector that could reverse power rails and damage connected 24 V industrial sensors or motor drives. Each key position is unique across the TSM product family.
How does the dual-height body of TSM-128-01-SS-DH-A-K-TR accommodate component height in stacked PCB systems?
The DH (dual-height) body raises the mating interface approximately 8.5 mm above the host PCB, creating a vertical gap that accommodates electrolytic capacitors, inductors, or SOM modules taller than 4 mm mounted on the daughter card. Standard single-height TSM variants provide only 2 mm to 3 mm of clearance and are incompatible with boards carrying taller passives. For a typical embedded controller stack using 10 mm tall electrolytic capacitors, the dual-height TSM-128 is the minimum viable choice.
When is TSM-128-01-SS-DH-A-K-TR preferred over a 56-pin edge connector for a modular industrial PCB system?
Header-and-socket configurations like the TSM-128 are preferred over edge connectors when PCB card-edge plating cost is a concern, when the board design uses standard 0.100" grid routing, or when the interconnect carries 3 A per contact—edge connectors in this pitch typically support 1 A to 2 A per contact. Additionally, the TSM-128 allows selective contact-position allocation for mixed power and signal on the same 56-pin connector, a flexibility that PCB edge-card connectors do not offer.
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