TSM-121-03-S-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-03-S-DH-A-K-TR is a 42-position dual-row surface mount terminal strip with 0.100" (2.54 mm) pitch and dual-hole through-board mounting. Gold-plated contacts rated at 3A per pin operate from -55°C to +125°C for reliable signal distribution. Available from authorized distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Datasheet
- TSM-121-03-S-DH-A-K-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-S-DH-A-K-TR?
- 42-position dual-row terminal strip at 0.100" (2.54 mm) pitch consolidates large pin-count connections in a standard grid footprint
- Dual-hole (DH) mounting option provides through-board mechanical retention improving connector pull strength during mating and unmating cycles
- Single-row access (S) variant simplifies hand-soldering and rework in prototype and low-volume production environments
- Gold-plated contacts rated at 3A per pin across -55°C to +125°C support mixed signal and power distribution on a single header
What is TSM-121-03-S-DH-A-K-TR used for?
The TSM-121-03-S-DH-A-K-TR is used as a high pin-count interface header on FPGA development boards, SBC expansion connectors, and industrial backplane signal distribution modules. Its 42-position dual-row layout at standard 0.100" pitch accommodates a full 32-bit parallel bus plus power and control lines within a single connector, reducing cable harness complexity in embedded system prototypes. The dual-hole surface mount design provides mechanical stability suitable for frequent mating in test fixtures and field-configurable equipment.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-121-03-S-DH-A-K-TR datasheet?
TSM-121-03-S-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-121-03-S-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What bus widths can the 42-position TSM-121-03-S-DH-A-K-TR accommodate in a single connector?
With 42 pins arranged in 2 rows of 21 at 0.100" pitch, the TSM-121-03-S-DH-A-K-TR can simultaneously carry a 32-bit data bus, 4 address or control lines, and up to 6 power and ground pins within a single connector footprint. This consolidation is especially valuable in single-board computer expansion headers where multiple bus interfaces must be routed through one edge connector.
How does the DH (dual hole) configuration improve mechanical retention of TSM-121-03-S-DH-A-K-TR on the PCB?
The dual-hole configuration provides through-board anchor posts in addition to the surface mount solder tails. These posts pass through PTH vias and are soldered on the PCB bottom side, increasing the pull force required to detach the connector from several Newtons to over 50N depending on solder joint quality. This added retention is important in test fixtures, development boards, and portable equipment subject to mechanical stress during repeated connector mating.
Which prototype and production workflows benefit from the TSM-121-03-S-DH-A-K-TR tape-and-reel format?
The TR (tape-and-reel) packaging makes the TSM-121-03-S-DH-A-K-TR compatible with automated pick-and-place machines used in SMT production lines, enabling placement speeds above 1000 components per hour with ±0.05 mm accuracy. For prototype runs, individual strips can be cut from the reel and hand-placed, while production runs benefit from consistent machine placement that reduces solder joint defects compared to manual loading of loose connectors from trays.
Is the TSM-121-03-S-DH-A-K-TR pin-compatible with standard 0.100" pitch mating sockets from other manufacturers?
Yes. The 0.100" (2.54 mm) pitch is a widely standardized connector grid, and the TSM-121-03-S-DH-A-K-TR's 42-position dual-row layout mates with any compatible receptacle that follows this pitch standard. The 3A per pin rating and -55°C to +125°C operating range exceed most commercial-grade 0.100" socket specifications, so the Samtec connector can serve as a direct drop-in upgrade in designs that previously used lower-rated equivalents.
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