TSM-121-03-STL-DH-P-TR SAMTEC Connector (Other) In Stock
Samtec TSM-121-03-STL-DH-P-TR is a 42-position dual-row surface-mount terminal strip with 0.100 inch pitch, featuring a single-tier low-profile (STL) body, dual-height standoff, and polarized keying. Tape-and-reel packaging enables automated SMT assembly for industrial, embedded, and communications board-to-board interconnect applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- TSM-121-03-STL-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-STL-DH-P-TR?
- 42-position dual-row at 0.100 inch (2.54 mm) pitch compatible with a wide range of mating pin headers
- Single-tier low-profile (STL) body minimizing mated stack height in space-constrained assemblies
- Dual-height (DH) standoff providing defined board-to-board clearance in stacked PCB systems
- Polarized (P) keying preventing reverse mating and protecting all 42 contacts during assembly
- Tape-and-reel (TR) packaging enabling high-volume automated SMT pick-and-place production
What is TSM-121-03-STL-DH-P-TR used for?
TSM-121-03-STL-DH-P-TR is suited for board-to-board interconnect in industrial controllers, embedded system modules, and communications equipment requiring a compact, polarized 42-position connector at standard 0.100 inch pitch. Its low-profile body and dual-height standoff make it an effective choice for layered PCB assemblies in panel-mount enclosures and rack systems where controlling the inter-board gap is critical.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-121-03-STL-DH-P-TR datasheet?
TSM-121-03-STL-DH-P-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-121-03-STL-DH-P-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the single-tier low-profile (STL) body on TSM-121-03-STL-DH-P-TR reduce mated stack height in a layered board assembly?
The STL (single-tier low-profile) designation on TSM-121-03-STL-DH-P-TR indicates a reduced connector body height compared to standard-height TSM variants. This lower profile directly reduces the total mated stack height in a dual-board assembly, allowing a smaller board-to-board separation while still providing the dual-height standoff clearance across all 42 positions at 0.100 inch pitch.
Can TSM-121-03-STL-DH-P-TR be used in an automated SMT production line, and does the tape-and-reel format meet pick-and-place feeder requirements?
Yes. TSM-121-03-STL-DH-P-TR ships in tape-and-reel (TR) format, which is directly compatible with standard SMT pick-and-place feeders. The surface-mount termination is suitable for lead-free reflow soldering with SAC305 solder paste at profiles peaking around 245°C to 260°C, allowing the 42-position connector to be assembled on standard high-volume SMT production lines without manual placement.
How does the polarized keying feature on TSM-121-03-STL-DH-P-TR prevent assembly errors across its 42-position interface?
The P (polarized) suffix on TSM-121-03-STL-DH-P-TR means the connector housing incorporates a physical key that only allows mating in the correct orientation. In a 42-position dual-row assembly, inserting the mating header in the wrong direction would be mechanically blocked, preventing contact damage and protecting the connected circuits from reverse-polarity or signal-swap faults during PCB assembly or field servicing.
For a procurement manager evaluating TSM-121-03-STL-DH-P-TR in a long-lifecycle industrial product, what second-source strategy is recommended?
TSM-121-03-STL-DH-P-TR combines a 42-position count, 0.100 inch pitch, low-profile body, dual-height standoff, polarization, and tape-and-reel packaging into a specific Samtec configuration. Procurement teams should request Samtec's alternate part crossing for any compatible TSM-series variant sharing the 42-position, 0.100 inch pitch, polarized attributes, and verify that the standoff height and body profile match. Maintaining a safety stock of at least 6 to 8 weeks covers typical build-to-order lead times for this connector type.
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