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
Key Features
- 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
Applications
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) |
Alternate & Equivalent Parts
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.
Related Guides
ECMF02-4CMX8 Common-Mode Filter with ESD Protection: Selection Guide
Compare ECMF02-4CMX8 vs ECMF02-2AMX6, ECMF04-4HSM10, and other ST ECMF filters. Choose the right 4-channel common-mode filter with ESD protection for USB 2.0.
Jun 20, 2026
AD5204 Quad Digital Potentiometer Selection Guide (2026)
How to choose the right AD5204 quad digital potentiometer: compare 10kΩ vs 100kΩ variants, TSSOP vs SOIC packages, and SPI interface options for your design.
Jun 20, 2026
0402 10uF X5R Decoupling Design Guide for Compact Digital Rails
Application note for using CL05A106MP5NUNC-class 0402 10uF X5R MLCCs in compact digital rail decoupling designs.
Jun 19, 2026
How to Choose an 0805 10uF MLCC for Decoupling and Bulk Capacitance
Selection guide for choosing 0805 10uF MLCCs around CL21A106KOQNNNE, covering derating, dielectric, package, and sourcing checks.
Jun 19, 2026
Why Buy from FindMyChip
About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”