TSM-127-04-L-DH-A-K-TR SAMTEC Connector (Other) In Stock
The TSM-127-04-L-DH-A-K-TR is a 54-position dual-row surface-mount terminal strip from SAMTEC with 2.54 mm (0.100") pitch, providing 27 pins per row. Featuring low-profile contacts with a kinked tail for improved SMT retention and supplied on tape-and-reel, it is designed for high-density board-to-board signal and power interconnections in embedded systems.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 54
- Lifecycle
- ACTIVE
- Datasheet
- TSM-127-04-L-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-127-04-L-DH-A-K-TR?
- 54 positions in a dual-row layout at 2.54 mm (0.100") pitch, providing 27 contacts per row
- Low-profile SMT configuration with kinked tail for enhanced solder joint retention
- Gold-plated contacts supporting low contact resistance and long mating cycle life
- Tape-and-reel (TR) packaging for automated high-volume SMT pick-and-place assembly
- Dual-row header compatible with standard 0.100" pitch mating sockets and IDC ribbon cables
What is TSM-127-04-L-DH-A-K-TR used for?
The TSM-127-04-L-DH-A-K-TR is used in embedded processor boards, FPGA daughter cards, and modular development platforms where a compact 54-pin dual-row header must be placed by automated SMT equipment at high volume. Its kinked tail variant improves coplanarity and solder retention compared to straight-tail SMT headers, making it especially reliable in assemblies subject to mechanical shock or vibration such as industrial controllers and robotics boards. The tape-and-reel packaging integrates directly with reel-fed SMT assembly lines, minimizing manual handling during volume production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-127-04-L-DH-A-K-TR datasheet?
TSM-127-04-L-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-127-04-L-DH-A-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many contacts per row does the TSM-127-04-L-DH-A-K-TR provide, and how long is its PCB footprint at 0.100" pitch?
The TSM-127-04-L-DH-A-K-TR has 27 contacts per row in a dual-row configuration for a total of 54 positions. At 2.54 mm (0.100") pitch, the 27-pin row spans approximately 66 mm (26 gaps × 2.54 mm) of board length. This makes it suitable for medium-density signal buses such as 16-bit data buses with address and control lines, or mixed signal-and-power interfaces on single-board computers and development kits.
What does the kinked tail (K suffix) on the TSM-127-04-L-DH-A-K-TR do to improve assembly reliability?
The kinked tail is a small bend formed into the SMT contact lead that presses the connector body down against the PCB surface during reflow, ensuring the connector sits flat and all 54 pads maintain contact with the solder paste during the thermal cycle. Without the kink, component weight variation and PCB warpage can cause some contacts to lift slightly, resulting in open solder joints. The kink provides a spring force of approximately 0.1 to 0.3 N per contact — sufficient to maintain coplanarity across the full 66 mm body length without mechanical fixtures.
Which mating connector families are compatible with the TSM-127-04-L-DH-A-K-TR?
The TSM-127 series mates with SAMTEC's SSM (SMT socket strip) and SFM (SMT socket) families at 0.100" pitch, as well as with industry-standard 2.54 mm dual-row box headers and IDC ribbon cable connectors per DIN 41651. Stacking heights from 8.89 mm to 20 mm are available in mating socket versions, giving designers flexibility for daughter-card separation in stacked board systems such as Arduino-compatible shields, Raspberry Pi HATs, and PC/104-style embedded stacks. The gold-plated contacts support a minimum of 100 mating cycles.
How does the tape-and-reel packaging of the TSM-127-04-L-DH-A-K-TR benefit high-volume PCB production?
Tape-and-reel packaging presents each connector individually in a carrier tape pocket on a standard 13 or 16 mm reel, allowing the feeder of an SMT pick-and-place machine to dispense connectors continuously without manual loading. This eliminates the per-part handling required for tray or tube packaging, reducing cycle time by 2 to 5 seconds per board in high-speed lines. For production runs of 1,000 or more boards per day, tape-and-reel can reduce total assembly labor cost by 10 to 20% compared to manually loaded connectors.
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