TSM-121-03-SM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-03-SM-DH-A-K-TR is a 42-position dual-row .100" pitch surface mount terminal strip with surface mount tail contacts. Features 2.54 mm spacing, tin-plated pins, and tape-and-reel packaging for high-volume automated SMT 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-SM-DH-A-K-TR?
- 42 positions (2x21) on 2.54 mm / .100" pitch for high-density dual-row SMT board interconnection
- Surface mount (SM) tail option provides a fully SMT-compatible footprint for reflow-only PCB assembly processes
- Tape-and-reel (TR) packaging enables automated high-volume pick-and-place assembly on standard SMT lines
- Tin-plated dual-row contacts offer reliable solderability in lead-free reflow environments
What is TSM-121-03-SM-DH-A-K-TR used for?
The TSM-121-03-SM-DH-A-K-TR is designed for embedded computing daughter cards, FPGA expansion headers, and modular industrial controller boards needing 42 dual-row signals at standard 2.54 mm pitch. Its fully surface mount tail design makes it compatible with modern reflow-only assembly processes, eliminating the need for secondary through-hole soldering steps. Tape-and-reel packaging ensures seamless integration with automated SMT equipment in medium to high-volume production runs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-121-03-SM-DH-A-K-TR datasheet?
TSM-121-03-SM-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-121-03-SM-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the pin configuration and contact pitch of the TSM-121-03-SM-DH-A-K-TR?
The TSM-121-03-SM-DH-A-K-TR provides 42 positions arranged in a dual-row (2x21) layout on a 2.54 mm (.100") pitch. This mid-to-high density configuration suits FPGA I/O headers, expansion bus connectors, and modular embedded computing boards where 42 parallel signals are needed in a standard pitch layout.
What does the SM (surface mount) tail designation mean for PCB assembly of this 42-pin connector?
The SM suffix indicates surface mount tails, meaning all contacts terminate as SMT pads without through-hole pins. For a 42-pin, 2.54 mm pitch strip, this enables reflow-only assembly with no secondary soldering step, simplifying the manufacturing process and reducing cost compared to mixed through-hole / SMT variants in high-volume production.
For which embedded bus and computing interfaces is the TSM-121-03-SM-DH-A-K-TR a practical choice?
A 42-pin (2x21), 2.54 mm pitch dual-row terminal strip is a practical choice for microprocessor expansion buses, JTAG/debug headers with additional signal lines, sensor fusion boards, and FPGA I/O daughter cards requiring more than 36 but fewer than 50 signal connections without increasing connector pitch or form factor.
How does the TSM-121-03-SM-DH-A-K-TR support efficient volume production compared to non-reel packaged alternatives?
Tape-and-reel (TR) packaging feeds the 42-pin dual-row connector directly into automated pick-and-place machines, achieving placement rates and positional accuracy that manual tray or tube loading cannot match. This makes the TSM-121-03-SM-DH-A-K-TR with its 2.54 mm pitch SMT footprint significantly more cost-effective in production volumes above a few hundred boards.
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