TSM-121-03-TM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-03-TM-DH-A-K-TR is a 42-position, dual-row, 0.100 inch pitch surface-mount terminal strip with top-mount (TM) SMT feet and dual-height (DH) body for versatile stacking. Supplied in tape-and-reel packaging with -K reel option for automated high-volume pick-and-place PCB assembly.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-121-03-TM-DH-A-K-TR?
- 42-position dual-row layout at 0.100 inch (2.54 mm) pitch provides high-density SMT terminal strip in a standard grid compatible with most PCB layout tools
- Top-mount (TM) SMT feet option enables surface-mount reflow soldering without through-hole drilling, simplifying PCB fabrication
- Dual-height (DH) body accommodates mating with headers across a range of stack heights, offering flexibility in multi-board assemblies
- Tape-and-reel (TR) with -K reel packaging supports fully automated pick-and-place placement in high-throughput SMT production lines
What is TSM-121-03-TM-DH-A-K-TR used for?
The TSM-121-03-TM-DH-A-K-TR is used in industrial automation, computing backplanes, and FPGA evaluation boards where a 42-pin SMT terminal strip at 0.100 inch pitch provides a flexible, high-density interface for daughter card and module attachment. Its top-mount SMT feet simplify PCB fabrication by eliminating through-hole drilling, and the dual-height body accommodates varying board-to-board clearances in compact enclosures. This connector is also well suited for test and measurement equipment and embedded system development boards requiring high pin count SMT connectors in tape-and-reel automated assembly.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-121-03-TM-DH-A-K-TR datasheet?
TSM-121-03-TM-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-121-03-TM-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the position count and pitch of TSM-121-03-TM-DH-A-K-TR, and how does this affect signal density?
The TSM-121-03-TM-DH-A-K-TR provides 42 positions arranged in a dual-row configuration at 0.100 inch (2.54 mm) pitch, delivering 21 contacts per row. This configuration routes 42 signals or mixed power and ground lines in a footprint approximately 2 inches long, achieving higher density than a single-row equivalent of the same pitch.
What does the top-mount (TM) option mean for TSM-121-03-TM-DH-A-K-TR and how does it simplify PCB design?
The top-mount (TM) option replaces through-hole retention pegs with SMT feet that solder directly to PCB pads on the top surface, eliminating the need for drilled holes under the connector body. This reduces PCB layer count requirements and allows routing traces or vias in the area beneath the connector, saving approximately 10 to 15 percent of PCB real estate in dense designs.
For which high-pin-count applications is TSM-121-03-TM-DH-A-K-TR particularly suited as an alternative to IDC connectors?
TSM-121-03-TM-DH-A-K-TR is preferred over IDC (insulation displacement) connectors in SMT-only PCB assemblies where through-hole processes are not available, and where 42 signals must be connected via a solderable surface-mount strip at 0.100 inch pitch. It suits FPGA I/O breakout boards, motor control modules, and backplane daughter card interfaces requiring up to 42 channels in a 2-inch footprint.
Can TSM-121-03-TM-DH-A-K-TR be assembled in fully automated SMT lines, and what packaging supports this?
Yes. The -TR suffix designates tape-and-reel packaging, and the -K option specifies the reel format, both optimized for standard automated pick-and-place equipment. Reflow soldering at peak temperatures up to 260 degrees C is fully compatible with the top-mount SMT feet, enabling the 42-position connector to be placed and soldered in a single reflow pass alongside other SMT components.
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