TSM-125-04-STL-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-125-04-STL-DH-A-K-TR is a 50-position, 0.100" (2.54 mm) pitch dual-row surface mount terminal strip with extended tails and dual through-hole anchors. Gold-plated contacts rated 350V AC and 3A per pin. Available in tape-and-reel from stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 50
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 50 positions in dual-row 0.100" (2.54 mm) pitch configuration enabling high-density signal and power distribution in surface mount board interconnects
- Extended tail length (STL) increases solder joint compliance and fatigue resistance during thermal cycling between -55°C and +125°C
- Dual through-hole (DH) anchor tails provide mechanical retention exceeding 10 lb pull-out strength, critical for heavy multi-cable harness terminations
- Tape-and-reel (TR) packaging on standard carrier tape supports fully automated pick-and-place assembly in high-volume production environments
Applications
TSM-125-04-STL-DH-A-K-TR is designed for backplane interconnects, multi-channel industrial I/O boards, and embedded computing modules where 50 signals must be routed through a single reliable 2.54 mm pitch dual-row connector. The extended tail and dual through-hole anchor design ensures robust mechanical retention in server chassis, motor control racks, and high-vibration industrial panels subjected to continuous shock and thermal cycling. Its large 50-position count also makes it suitable as a single-connector interface for processor expansion boards, field-programmable gate array (FPGA) prototyping cards, and high-channel-count data acquisition sub-assemblies.
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 TSM-125-04-STL-DH-A-K-TR support and what pitch does it use?
The TSM-125-04-STL-DH-A-K-TR provides 50 positions in a dual-row layout at 0.100" (2.54 mm) pitch, spanning approximately 63.5 mm in connector length. The 2.54 mm industry-standard pitch ensures direct mating compatibility with IDC ribbon cables, SAMTEC TLW/TSW receptacle series, and standard dual-row headers used in embedded development kits and industrial backplane systems.
What does the STL tail length designation mean for soldering reliability of the TSM-125-04-STL-DH-A-K-TR?
The STL suffix specifies an extended solder tail length that protrudes beyond the standard tail depth, providing greater solder joint height and improved mechanical compliance. In 50-position connectors carrying mixed power and signal loads across temperature swings from -55°C to +125°C, the extended tail absorbs thermally-induced PCB expansion stress, reducing solder joint fatigue failure rates in industrial and communications equipment designed for 10-year field life.
What is the current and voltage rating per contact in the TSM-125-04-STL-DH-A-K-TR?
Each of the 50 contacts in the TSM-125-04-STL-DH-A-K-TR is rated for 3A continuous current and 350V AC working voltage. The gold-plated 30 µin contact finish maintains contact resistance below 20 mΩ over the full -55°C to +125°C operating range, supporting mixed-use applications where high-current power rails such as 12V at 3A per pin share the connector with 3.3V logic signals in industrial backplane designs.
How does the dual through-hole (DH) tail design improve connector retention compared to pure surface mount alternatives?
The DH tail configuration in TSM-125-04-STL-DH-A-K-TR adds 4 through-hole solder anchor points that penetrate the PCB fully, creating solder fillets on both the top and bottom board surfaces. This provides pull-out retention typically exceeding 10 lb, compared to 2 to 4 lb for equivalent surface-only soldered connectors. For 50-position connectors under heavy cable harness stress in industrial motor controllers and test fixtures, the DH anchors prevent connector lift-off during field wiring operations.
When is TSM-125-04-STL-DH-A-K-TR preferred over a 50-position IDC header without extended tails?
TSM-125-04-STL-DH-A-K-TR is preferred when PCB assemblies face both mechanical shock (above 5G) and thermal cycling (beyond ±40°C swing) in field deployments such as industrial motor drives, outdoor communications enclosures, or transportation electronics. The combination of STL extended tails and DH mechanical anchors addresses failure modes that standard IDC headers without anchors cannot survive, while the 0.100" pitch and 50-position count provide full IDC cable compatibility for existing ribbon-cable harness designs.
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