TSM-121-02-LM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-121-02-LM-DH-A-K-TR is a 42-position dual-row surface mount terminal strip with 0.100" pitch, providing reliable high pin-count board-to-board connectivity for industrial and embedded applications. Features gold-plated contacts rated for 3A per pin and operating temperature range of -55°C to +125°C. Supplied in tape-and-reel packaging for automated SMT assembly with worldwide shipping.
- 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 terminal strip at 0.100" (2.54 mm) pitch enabling 42-signal or mixed power/signal board connections in a single SMT component
- Gold-plated contacts rated at 3A per pin support both signal and power distribution across the full 42-position array
- Tape-and-reel packaging and SMT termination ensure compatibility with high-volume automated pick-and-place assembly lines
Applications
TSM-121-02-LM-DH-A-K-TR is used in industrial backplane interconnects, modular embedded computing expansion headers, and multi-function interface boards where 42 signals or mixed power and signal lines must be routed between PCBs at 0.100" pitch. Its dual-row surface mount format allows integration into high-density designs without through-hole drilling, supporting inner-layer routing beneath the connector footprint. The 3A per pin rating and -55°C to +125°C temperature range suit power distribution and control signal headers in industrial automation, test equipment, and ruggedized electronics.
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 signals can TSM-121-02-LM-DH-A-K-TR route and how are its 42 positions physically arranged?
TSM-121-02-LM-DH-A-K-TR provides 42 positions arranged in a dual-row layout with 21 pins per row at 0.100" (2.54 mm) pitch, spanning approximately 2.1" (53.3 mm) of board length. This dual-row format allows mixed routing of digital signals, analog references, and power rails — for example, 36 signal lines plus 6 power and ground connections — in a single compact SMT connector on industrial control boards.
What is the current rating per contact on TSM-121-02-LM-DH-A-K-TR and how does this affect power distribution in embedded designs?
Each contact in TSM-121-02-LM-DH-A-K-TR is rated at 3A continuous current. In an embedded backplane distributing 5V power across 4 dedicated pins, the connector can deliver up to 12A total to downstream modules, sufficient for powering multiple processing boards. Engineers should still derate contacts and verify PCB trace widths to the connector pads when running maximum current through individual pins.
When is TSM-121-02-LM-DH-A-K-TR a practical alternative to a 50-position or larger connector for a mid-density board interface?
TSM-121-02-LM-DH-A-K-TR at 42 positions suits designs where a 50-position connector would be oversized and waste PCB real estate, but a 26-position or 34-position part lacks enough pins. With 42 contacts, it commonly fits applications like mid-size FPGA prototype boards carrying 32 GPIO plus 10 power and ground lines, or industrial I/O modules routing 4 analog channels, 16 digital I/O, 8 bus signals, and 6 power pins in a single 2.1" header.
Is TSM-121-02-LM-DH-A-K-TR suitable for operation in industrial environments and what temperature extremes does it withstand?
TSM-121-02-LM-DH-A-K-TR is rated for -55°C to +125°C, fully spanning the industrial temperature range and extending into mil-spec cold-soak territory. This range supports reliable 42-pin connectivity in outdoor industrial control cabinets reaching -40°C in winter, PCB assemblies mounted near power dissipating components at +100°C, and equipment undergoing thermal shock testing across the full temperature span in compliance with IEC 60068-2-14.
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