TFC-129-02-LM-D-A SAMTEC Connector (Other) In Stock
SAMTEC TFC-129-02-LM-D-A is a 58-position Tiger Eye cost-effective dual-row terminal strip at 0.050" (1.27 mm) pitch, featuring long machined contacts for improved board alignment and reliable signal connections in dense SMT PCB interconnect designs.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 58
- Lifecycle
- ACTIVE
- Datasheet
- TFC-129-02-LM-D-A Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 58-position dual-row terminal strip at 0.050" (1.27 mm) pitch supports high signal-count board-to-board connections in a compact SMT footprint
- Long machined (LM) contacts extend approximately 0.5 mm deeper into mating headers, improving alignment and retention in vibration-sensitive assemblies
- Tiger Eye cost-effective design offers precision machined contact quality at a reduced per-pin cost compared to premium Samtec series
- Gold-plated mating interface maintains low contact resistance below 30 mΩ across 100 or more mating cycles for reliable signal integrity
Applications
The TFC-129-02-LM-D-A is suited for embedded processor daughter cards, FPGA I/O expansion boards, and compact industrial controllers where 58 signal lines must pass between stacked PCBs at a 1.27 mm pitch. The long machined contact variant provides extra mechanical engagement depth for applications with light shock or vibration, such as portable instrumentation and vehicular electronics modules. Its SMT footprint is compatible with automated reflow assembly, making it cost-efficient for medium-to-high volume production of communications and computing hardware.
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
What advantage does the long machined (LM) contact in TFC-129-02-LM-D-A provide over standard contact lengths?
Long machined contacts in the TFC-129-02-LM-D-A extend approximately 0.5 mm further into the mating connector than standard contacts, providing a greater insertion depth and higher retention force. This deeper engagement reduces the risk of partial unmating in environments subjected to vibration up to 10 g or mechanical shock, making the LM variant preferred for portable instruments, vehicular control modules, and any 58-position application where accidental disconnection would cause system failure.
How does the 58-position count of TFC-129-02-LM-D-A compare to neighboring Samtec TFC variants for signal routing decisions?
The TFC-129-02-LM-D-A occupies a position between the 54-position TFC-127 and the 64-position TFC-132, offering 58 connections at 0.050" (1.27 mm) pitch. Choosing the 58-position variant allows routing of 29 differential pairs or 58 single-ended signals, fitting designs where 54 pins fall short but the larger 64-pin footprint wastes PCB area. The 58-pin body length spans approximately 37 mm, saving about 5 mm compared to the 64-position version and enabling tighter board layouts.
Can TFC-129-02-LM-D-A be used in a standard automated SMT assembly process?
Yes, the TFC-129-02-LM-D-A is designed for surface-mount technology assembly and is compatible with convection reflow soldering at peak temperatures up to 260°C per JEDEC J-STD-020. The component can be handled by standard pick-and-place equipment using 12 mm or larger carrier tape. For automated assembly, Samtec offers this series in tape-and-reel formats with thousands of units per reel, minimizing feeder changeover time for 58-position SMT connectors in production builds.
For which signal protocols is the 1.27 mm pitch TFC-129-02-LM-D-A suitable in terms of electrical performance?
At 0.050" (1.27 mm) pitch, the TFC-129-02-LM-D-A supports signal frequencies up to several hundred MHz for short board-to-board distances of 10 mm or less. It is suitable for CMOS, LVCMOS 3.3 V, LVTTL, and low-speed LVDS signals in applications where trace lengths between boards are under 50 mm. For high-speed differential protocols above 1 Gbps, controlled-impedance mating strip pairs should be verified, but for I2C, SPI, UART, GPIO, and 8-bit or 16-bit parallel buses, this connector provides adequate electrical performance without special impedance matching.
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