TSM-121-04-TM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-04-TM-DH-A-K-TR is a 42-position, 0.100" pitch dual-row surface mount terminal strip with through-mount termination and tape-and-reel packaging for automated assembly. Features gold-plated contacts for reliable signal integrity in high-cycle board-to-board applications. Available from stocking distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42 positions at 0.100" pitch in a dual-row layout for versatile board-to-board connectivity
- Through-mount (TM) termination style provides enhanced mechanical stability during reflow soldering
- Tape-and-reel (TR) packaging enables high-volume automated pick-and-place assembly
- Gold-plated contacts deliver low contact resistance and long mating cycle durability
Applications
The TSM-121-04-TM-DH-A-K-TR is suited for industrial control boards, embedded computing modules, and backplane interconnect systems requiring reliable 42-pin dual-row header connections at 0.100" pitch. Its through-mount termination improves solder joint integrity, making it a preferred choice for harsh-environment applications subject to vibration or thermal cycling. The tape-and-reel packaging streamlines integration into high-volume SMT production lines.
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
What does the TM suffix indicate on the TSM-121-04-TM-DH-A-K-TR, and why does it matter for PCB assembly?
The TM suffix stands for Through-Mount termination, meaning the connector pins pass through the PCB and are soldered from the opposite side. This provides 42 solder joints with superior mechanical retention compared to surface-only SMT termination, particularly useful in applications subject to 0.100" pitch connector stress or vibration.
How does the TSM-121-04-TM-DH-A-K-TR compare in pin count to other TSM series parts for backplane use?
The TSM-121-04-TM-DH-A-K-TR provides 42 positions in a dual-row 0.100" pitch format. For designs needing more I/O, the TSM-126 (52 positions) or TSM-150 (100 positions) variants scale up, while the TSM-110 (20 positions) offers a smaller footprint — all sharing the same 0.100" pitch mating interface.
Which system designs typically use a 42-position 0.100" pitch dual-row terminal strip like the TSM-121-04-TM-DH-A-K-TR?
A 42-position 0.100" pitch dual-row terminal strip is commonly used in SBC (single-board computer) expansion interfaces, FPGA carrier boards, PLC backplanes, and industrial sensor hubs that route 42 mixed signal and power lines between stacked PCBs within a standard 2.54 mm pitch grid.
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