TSM-121-03-H-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-03-H-DH-A-K-TR is a 42-position, 0.100" pitch dual-row surface mount terminal strip with tall mating height and keying feature. Supports high-reliability daughter card interconnects with error-proof alignment. Available in tape-and-reel packaging with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- TSM-121-03-H-DH-A-K-TR Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42-position dual-row surface mount terminal strip with 0.100" (2.54 mm) pitch for versatile high-density signal routing
- Keying feature (K suffix) prevents mismating between adjacent connectors during automated PCB assembly
- Tall mating height (H) variant with tape-and-reel (TR) delivery optimized for high-volume SMT production
Applications
The TSM-121-03-H-DH-A-K-TR is used in industrial automation, embedded computing, and telecommunications equipment requiring reliable 42-pin dual-row SMT connections. Its keying feature ensures error-free daughter card installation in multi-connector board designs, reducing field failures. The tall mating height variant accommodates board-to-board clearance requirements in stacked PCB assemblies with component height constraints.
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 pin count and pitch of the TSM-121-03-H-DH-A-K-TR connector?
The TSM-121-03-H-DH-A-K-TR is a 42-position connector with 21 pins per row in a dual-row layout at 0.100" (2.54 mm) pitch. This provides a total of 42 signal contacts, suitable for high-density module and daughter board interfaces in industrial and embedded applications.
How does the keying (K) option on the TSM-121-03-H-DH-A-K-TR reduce assembly errors?
The K keying feature adds a physical asymmetry to the connector housing that prevents incorrect mating with unkeyed or differently keyed connectors. On boards with multiple 42-pin headers at 0.100" pitch, this eliminates polarity and orientation errors during assembly, reducing costly rework on populated PCBs in production environments.
Can the TSM-121-03-H-DH-A-K-TR be used in automated pick-and-place production?
Yes. The TSM-121-03-H-DH-A-K-TR is supplied in tape-and-reel (TR) packaging fully compatible with automated SMT pick-and-place equipment. The surface mount termination supports standard reflow soldering processes, and the consistent 0.100" pitch spacing ensures repeatable placement accuracy in high-volume PCB assembly lines.
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.”