TSM-121-03-LM-DH-P-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-03-LM-DH-P-TR is a 42-position dual-row 0.100" pitch surface mount terminal strip with low-mount LM termination, press-fit retention, gold-plated contacts, and tape-and-reel packaging for reliable high-density board-to-board SMT interconnect.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- TSM-121-03-LM-DH-P-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-121-03-LM-DH-P-TR?
- 42 positions in dual-row configuration at 0.100" (2.54 mm) pitch for standard SMT board interconnect
- Low-mount (LM) termination style providing minimal connector height above the PCB surface
- Press-fit (P) retention for secure component positioning during automated reflow assembly
- Gold-plated contacts for low-resistance, high-reliability mating connections
- Tape-and-reel (TR) packaging enabling automated pick-and-place SMT production
- RoHS-compliant lead-free construction suitable for modern environmental compliance requirements
What is TSM-121-03-LM-DH-P-TR used for?
The TSM-121-03-LM-DH-P-TR is suited for board-to-board signal and power distribution in embedded computing daughtercards, industrial control modules, and communication equipment that require 42-position dual-row SMT connectivity at 0.100" pitch with minimal vertical profile. Its low-mount design benefits space-constrained assemblies such as stacked PCB systems, backplane interconnect buses, and modular expansion cards where board height clearance is limited.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-121-03-LM-DH-P-TR datasheet?
TSM-121-03-LM-DH-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-121-03-LM-DH-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the LM termination in TSM-121-03-LM-DH-P-TR mean, and how does it reduce connector height compared to standard TL options?
LM stands for low-mount termination, which positions the connector body closer to the PCB surface than standard TL or SM profiles. For a 42-position dual-row connector at 0.100" (2.54 mm) pitch, the reduced standoff height allows stacked board designs to achieve tighter board-to-board clearances, saving vertical space in constrained enclosures or multi-board assemblies.
How many total pins does the TSM-121-03-LM-DH-P-TR provide, and how are they arranged across the dual-row layout?
The connector provides 42 total positions arranged in 2 rows of 21 pins at 0.100" (2.54 mm) pitch. This dual-row arrangement spans approximately 2.1 inches (53.3 mm) of mating length, making it suitable for multi-signal backplane buses, power and ground distribution rails, and mixed-function I/O expansion interfaces.
When is TSM-121-03-LM-DH-P-TR preferred over a higher-profile SAMTEC SMT strip in an industrial control enclosure?
The low-mount (LM) profile is preferred when the PCB assembly must fit within a shallow industrial DIN-rail enclosure or when a heatsink or cover panel imposes a maximum component height above the board. The press-fit (P) retention also aids assembly-line handling where the 42-position connector must stay aligned before reflow without adhesive or manual fixturing.
What procurement and delivery information should supply chain teams confirm before ordering TSM-121-03-LM-DH-P-TR in volume?
The TSM-121-03-LM-DH-P-TR ships in tape-and-reel (TR) format, typically in reels of 250 to 500 pieces for 42-position connectors. Buyers should verify stock with SAMTEC-authorized distributors and confirm RoHS lead-free compliance. Specialty low-mount dual-row TSM configurations can carry lead times of 6 to 12 weeks when not in local stock, so early procurement is advised.
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