TSM-121-04-STL-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-04-STL-DH-A-K-TR is a 42-position dual-row surface-mount terminal strip with 0.100 inch pitch, featuring straight leads and tape-and-reel packaging for high-volume automated SMT assembly on dense interconnection boards.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 42
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 42-position dual-row surface-mount terminal strip at 0.100 inch (2.54 mm) pitch offering standard grid compatibility for broad PCB layout tool support
- Tape-and-reel (TR) packaging enabling consistent automated pick-and-place placement in high-volume SMT production environments
- Dual-height (DH) contact design providing extended mating engagement for improved mechanical stability and secure board-to-board connection
Applications
The TSM-121-04-STL-DH-A-K-TR is used in surface-mount dual-row header applications on industrial control boards, embedded computing baseplates, and expansion card interfaces where 42 contacts at standard 0.100 inch pitch are needed. The dual-height contact option provides increased mechanical robustness for daughter card and mezzanine module connections subject to vibration or repeated mating cycles. Tape-and-reel packaging makes this connector suitable for high-volume automated SMT assembly in production environments.
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
How many positions and what pitch does the TSM-121-04-STL-DH-A-K-TR provide for surface-mount applications?
The TSM-121-04-STL-DH-A-K-TR is a 42-position dual-row surface-mount terminal strip at 0.100 inch (2.54 mm) pitch, providing a total of 42 contacts. This standard 2.54 mm pitch is widely compatible with common PCB design rule sets, making it straightforward to route signal and power traces from each contact pad to its intended net on the board.
What does the dual-height (DH) designation mean for the TSM-121-04-STL-DH-A-K-TR mating interface?
The dual-height (DH) designation indicates that the TSM-121-04-STL-DH-A-K-TR has an extended contact stack height compared to standard single-height versions, providing increased mating engagement depth of several millimeters. This additional engagement length improves mechanical retention force and helps maintain reliable 42-pin electrical continuity in applications subject to vibration, shock, or boards that are repeatedly mated and un-mated during system assembly or maintenance.
How does the TSM-121-04-STL-DH-A-K-TR's 0.100 inch pitch compare to 0.050 inch pitch connectors for a 42-position application?
At 0.100 inch (2.54 mm) pitch, the TSM-121-04-STL-DH-A-K-TR spans approximately 2.1 inches along the board edge for 21 positions per row, whereas an equivalent 42-position 0.050 inch pitch connector would occupy only about 1.05 inches. The 0.100 inch pitch design is easier to hand-solder and inspect, supports higher per-pin current capacity, and uses PCB pad dimensions compatible with older legacy board designs and standard 0.1 inch grid footprint libraries.
Is the TSM-121-04-STL-DH-A-K-TR suited for automated SMT production, and how does tape-and-reel packaging help?
Yes, the TSM-121-04-STL-DH-A-K-TR is supplied in tape-and-reel (TR) packaging, making it directly compatible with automated pick-and-place SMT assembly equipment. Tape-and-reel ensures each connector is held at a consistent orientation and pitch spacing in the carrier tape, allowing placement machines to handle 42-position SMT connectors at high throughput rates with low misplacement rates compared to bulk or tray packaging alternatives used in lower-volume assembly.
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