TSM-127-01-SM-DH-A-K-TR SAMTEC Connector (Other) In Stock
Samtec TSM-127-01-SM-DH-A-K-TR is a 54-position, 0.100-inch pitch dual-row surface-mount terminal strip with SMT tails, dual-height insulator, and polarization key. Offers gold-plated contacts for reliable signal-level connections in high-density backplane and industrial I/O applications. Available in tape-and-reel format with global in-stock distribution.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 54
- Lifecycle
- ACTIVE
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TSM-127-01-SM-DH-A-K-TR?
- 54-position dual-row SMT terminal strip on 0.100 inch (2.54 mm) industry-standard pitch
- SMT (SM) tail style with dual-height (DH) insulator for stable surface-mount reflow assembly
- Polarization key (K) prevents incorrect connector mating orientation in multi-connector boards
- Tape-and-reel (TR) packaging enables high-throughput automated SMT assembly lines
What is TSM-127-01-SM-DH-A-K-TR used for?
The TSM-127-01-SM-DH-A-K-TR is used in high-density signal routing applications such as backplane expansion headers, industrial PLC I/O modules, and data acquisition boards where 54 positions on a 0.100-inch pitch provide maximum pin density without moving to finer-pitch connectors. Its SMT tail configuration suits fully surface-mount PCB assemblies, eliminating through-hole drilling costs and enabling double-sided PCB use. The keyed insulator prevents wiring errors during field-replacement of daughter cards in rack-mounted industrial control systems.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TSM-127-01-SM-DH-A-K-TR datasheet?
TSM-127-01-SM-DH-A-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TSM-127-01-SM-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 row configuration of TSM-127-01-SM-DH-A-K-TR?
TSM-127-01-SM-DH-A-K-TR provides 54 positions arranged as 2 rows of 27 pins on a 0.100-inch (2.54 mm) pitch. This dual-row layout spans approximately 66 mm in the row direction, making it one of the larger TSM series variants. The 54-pin count supports dense I/O assignments, including power, ground, and up to 50 signal lines for GPIO buses, memory interfaces, or parallel data buses.
How does the SM tail style of TSM-127-01-SM-DH-A-K-TR differ from TL or L options, and which PCB process does it favor?
The SM (surface-mount) tail style means all contacts terminate as SMT pads with no through-board pins, unlike TL (through-hole tail) or L (right-angle through-hole tail) options. SM tails are fully compatible with standard solder paste and reflow ovens operating at peak temperatures up to 260°C for lead-free processes. This makes TSM-127-01-SM-DH-A-K-TR ideal for fully SMT production lines where eliminating through-hole drilling reduces board fabrication cost and assembly cycle time.
For how many mating cycles is TSM-127-01-SM-DH-A-K-TR rated, and does the gold plating help in field-replaceable card applications?
Samtec TSM series connectors with gold-plated contacts are typically rated for a minimum of 50 mating cycles under standard test conditions. Gold plating prevents oxidation and maintains contact resistance below 20 milliohms across the rated life, which is essential in field-replaceable daughter card applications where cards may be swapped repeatedly during commissioning, maintenance, or configuration changes in industrial systems.
Is TSM-127-01-SM-DH-A-K-TR a drop-in alternative to TSM-127-01-TL-DH-A-K-TR for an existing PCB layout?
TSM-127-01-SM-DH-A-K-TR and TSM-127-01-TL-DH-A-K-TR share the same 54-position, 2.54 mm dual-row insulator body and the same mating interface, but their PCB footprints differ. The SM version uses surface-mount SMT pads while the TL version requires through-hole drill holes with 0.8 mm or 1.0 mm diameter barrels. Switching between them requires a PCB footprint update; they are not drop-in substitutes without a board revision.
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