TFC-137-02-LM-D-A-K SAMTEC Connector (Other) In Stock
SAMTEC TFC-137-02-LM-D-A-K is a 74-position Tiger Eye cost-effective dual-row terminal strip at 0.050" (1.27 mm) pitch with LM surface-mount tails and key polarization. Designed for high-density commercial board interconnect with automated SMT assembly compatibility. Available from stock globally with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 74
- Lifecycle
- ACTIVE
- Datasheet
- TFC-137-02-LM-D-A-K Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFC-137-02-LM-D-A-K?
- 74-position dual-row layout at 0.050" (1.27 mm) pitch provides high contact density in a compact SMT footprint
- LM surface-mount tail termination enables automated pick-and-place reflow assembly at up to 260°C
- Key (-K) polarization feature prevents incorrect mating orientation, reducing assembly errors in field-replaceable modules
- Tiger Eye cost-effective design delivers reliable commercial-grade performance at a lower unit cost than high-reliability alternatives
What is TFC-137-02-LM-D-A-K used for?
The TFC-137-02-LM-D-A-K is designed for high-density board-to-board and module interconnect in networking equipment, industrial motion control, and communications hardware requiring 74 signal contacts at 0.050" pitch. The key polarization feature prevents incorrect mating in applications where boards or modules are field-replaceable, reducing the risk of costly connector damage. LM tail SMT termination supports automated reflow soldering in high-volume commercial production.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TFC-137-02-LM-D-A-K datasheet?
TFC-137-02-LM-D-A-K Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFC-137-02-LM-D-A-K?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What does the -K suffix on TFC-137-02-LM-D-A-K signify for mating reliability?
The -K suffix indicates a key polarization feature that physically prevents the connector from being mated in the wrong orientation across all 74 positions. This is particularly valuable in networking and industrial equipment where modules are swapped in the field by technicians, as an incorrectly inserted 74-position connector could damage pads or short circuits before the error is detected.
How many contact positions and at what pitch does the TFC-137-02-LM-D-A-K provide?
The TFC-137-02-LM-D-A-K provides 74 contact positions arranged in a dual-row format at a 0.050" (1.27 mm) pitch. Routing 74 signals through a single connector rather than multiple smaller ones simplifies PCB routing, reduces BOM SKU count, and decreases the number of mating operations required during board-level assembly or field module replacement.
What soldering process is the LM tail style of TFC-137-02-LM-D-A-K optimized for?
The LM tail style is a surface-mount termination optimized for automated reflow soldering, with contacts designed to land on a standard 1.27 mm pitch SMT pad pattern. Peak reflow temperatures up to approximately 260°C are compatible with this connector. This allows the 74-position connector to be placed by pick-and-place machines and soldered in a single reflow pass, maintaining throughput in high-volume production lines.
When should a designer choose the TFC-137-02-LM-D-A-K over a through-hole alternative with the same pin count?
Designers prefer the TFC-137-02-LM-D-A-K's SMT termination over a through-hole alternative when the PCB uses multilayer construction where through-hole vias for 74 positions would consume too many inner-layer routing channels. An SMT connector at 0.050" pitch preserves those inner layers for signal routing, reducing layer count requirements. SMT assembly also eliminates wave-soldering steps, which is advantageous when the board is processed entirely through reflow.
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