TSM-128-04-LM-DH-A-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TSM-128-04-LM-DH-A-K-TR is a 56-position dual-row surface mount terminal strip with 0.100 inch pitch. It provides right-angle termination and key polarization to prevent mis-mating in dense PCB assemblies. Well-suited for industrial control systems, test equipment, and embedded computing boards requiring 56 reliable signal connections.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-128-04-LM-DH-A-K-TR?
- 56-position dual-row terminal strip with 0.100 inch (2.54 mm) pitch
- Right-angle (LM) termination for board-edge mounting and low-profile connector routing
- Key polarization (K suffix) prevents incorrect mating and reduces assembly errors
- Tape-and-reel packaging (TR suffix) supports high-volume automated SMT assembly
- Dual-row DH configuration providing 28 positions per row in a compact layout
What is TSM-128-04-LM-DH-A-K-TR used for?
TSM-128-04-LM-DH-A-K-TR is deployed in industrial control panels, FPGA development boards, and embedded computing modules where 56 signals must route reliably between a main board and a daughter card or peripheral module. The right-angle termination and key polarization make it practical for enclosure-mounted boards accessed from the card edge. Its tape-and-reel packaging allows efficient integration into automated SMT manufacturing lines for high-volume production runs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-128-04-LM-DH-A-K-TR datasheet?
TSM-128-04-LM-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-128-04-LM-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the total pin count and pitch of TSM-128-04-LM-DH-A-K-TR?
TSM-128-04-LM-DH-A-K-TR has 56 total pins arranged in a dual-row configuration with 28 positions per row, all on a 0.100 inch (2.54 mm) pitch. This standard pitch ensures compatibility with a wide range of mating connectors, PCB design tools, and test accessories commonly used in industrial and embedded electronics development.
How does the key polarization feature (K suffix) prevent mis-mating in field assembly?
The K suffix denotes a key polarization feature that physically blocks incorrect connector orientation, preventing reversed mating with 56-pin assemblies during field or production installation. This is especially important for industrial equipment and test systems where a reversed 56-contact connection could damage sensitive circuitry, and technicians may be working quickly under time pressure.
Is the right-angle termination style of TSM-128-04-LM-DH-A-K-TR suitable for card-edge accessible enclosures?
Yes. The LM suffix indicates right-angle termination, which orients the 56 pins perpendicular to the board surface. This is ideal for enclosure-mounted PCBs where cables or mating connectors must connect from the side or back of the enclosure, reducing vertical height above the board while maintaining full 56-pin connectivity for GPIO, data buses, and power distribution.
How does TSM-128-04-LM-DH-A-K-TR compare to a 48-position variant like TSM-124-03-TM-DH-P-TR for FPGA I/O expansion?
TSM-128-04-LM-DH-A-K-TR provides 56 contacts versus 48 contacts on TSM-124-03-TM-DH-P-TR, offering 8 additional signals for FPGA I/O expansion, extra power or ground pins, or bus lines. The added key polarization and right-angle mounting of the 56-pin variant also benefit designs where connector orientation and assembly error prevention are priorities in high-density embedded or control systems.
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