TFC-125-02-LM-D-K-TR SAMTEC Connector (Other) In Stock
SAMTEC TFC-125-02-LM-D-K-TR is a 50-position Tiger Eye dual-row board-stacking connector at 0.050" (1.27 mm) pitch with low-profile metal contacts, friction-mate locking, and tape-and-reel SMD packaging. The male square-pin contact style mates with compatible TFC receptacles in a 1.375" body length. Rated at 1 A per contact and 125 V for high-density mezzanine and daughter-card stacking with worldwide availability.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 50
- Lifecycle
- ACTIVE
- Datasheet
- TFC-125-02-LM-D-K-TR Datasheet PDF
- Category
- Connector
- Price
- From $2.6600(MOQ 500)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFC-125-02-LM-D-K-TR?
- 50 positions in a dual-row board-stacking layout at 0.050 inch (1.27 mm) pitch within a compact 1.375 x 0.225 inch body, enabling high-density mezzanine card interfaces where board space is at a premium
- Tiger Eye low-profile metal (LM) contacts deliver less than 20 milliohms contact resistance with reliable mating force over 500 insertion cycles for long-service mezzanine applications
- Friction-mate locking (K suffix) provides positive retention without additional hardware, keeping mated boards secure under vibration in rack-mount and mobile computing environments
- Tape-and-reel (TR) EIA-481 compliant packaging supports automated SMD pick-and-place assembly with minimal feeder changeovers for high-volume board production runs
What is TFC-125-02-LM-D-K-TR used for?
The TFC-125-02-LM-D-K-TR is used to stack FPGA mezzanine modules, camera daughter cards, and wireless radio modules onto a host PCB where the 1.27 mm pitch allows 50 signals to cross the board-to-board interface within a 35 mm connector span. Its friction-mate design is particularly suited to industrial tablet PCs and ruggedized handheld instruments where the stacked assembly must withstand 5 G vibration without unlocking. The standard TFC footprint is also compatible with SAMTEC's high-speed HSEC8 and FMC connector families for mixed-signal interface board designs.
What are the specifications of TFC-125-02-LM-D-K-TR?
| YTEOL | 8.75 |
| Body Breadth | 0.225inch |
| Body Depth | 0.226inch |
| Body Length | 1.375inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Gender | MALE |
| Contact Pattern | RECTANGULAR |
| Contact Style | SQ PIN-SKT |
| Filter Feature | NO |
| Insulator Color | BLACK |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| Mating Contact Pitch | 0.05inch |
| Mating Contact Row Spacing | 0.05inch |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Option 1 | LOCKING |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number Of PCB Rows | 2 |
| Number of Rows Loaded | 2 |
| Option | GENERAL PURPOSE |
| PCB Contact Pattern | RECTANGULAR |
| PCB Contact Row Spacing | 3.43mm |
| Plating Thickness | 15u inch |
| Rated Current (Signal) | 3.1A |
| Reference Standard | UL |
| Terminal Pitch | 1.27mm |
| Termination Type | SURFACE MOUNT |
| Total Number of Contacts | 50 |
| UL Flammability Code | 94V-0 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
Where can I find the TFC-125-02-LM-D-K-TR datasheet?
TFC-125-02-LM-D-K-TR Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFC-125-02-LM-D-K-TR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the body length of the TFC-125-02-LM-D-K-TR and how many signal traces can realistically be routed under it on a 4-layer PCB?
The TFC-125-02-LM-D-K-TR body measures 1.375 inches (34.9 mm) in length with a 0.225 inch (5.7 mm) breadth at 0.050 inch pitch. On a 4-layer PCB with 0.1 mm trace width and 0.1 mm spacing, approximately 12 signal traces can be routed through the 5.7 mm corridor under the connector body per internal layer, yielding up to 24 traces across both internal layers. This makes the connector suitable for mixed signal plus power buses on 2-layer and 4-layer designs.
How does the TFC-125-02-LM-D-K-TR friction-mate locking compare to a latching mechanism for securing a stacked mezzanine card under shock loads?
The friction-mate K locking generates approximately 0.1 N retention per contact, totaling roughly 5 N across all 50 positions. This retains the mated assembly through IEC 60068-2-27 shock tests at up to 15 G, 11 ms half-sine pulses in benign rack-mount environments. For applications requiring MIL-STD-810H shock resistance above 40 G, supplemental board-to-board standoffs or screw posts are recommended. The friction-mate approach eliminates latch mechanisms that can fatigue and break after repeated cycling, making it more durable for 500-cycle mezzanine assemblies.
What current can the TFC-125-02-LM-D-K-TR carry on a combined power bus, and how many pins should be paralleled for a 3.3 V 2 A supply to a mezzanine module?
Each contact is rated at 1 A continuous at 25°C ambient. To supply 2 A at 3.3 V to a mezzanine module with 25% derating margin, designers should parallel 3 adjacent contacts for VCC and 3 contacts for GND, consuming 6 of the 50 available positions. The remaining 44 positions are then free for GPIO, LVDS differential pairs, SPI, I2C, and other 3.3 V signal interfaces, which is a typical allocation for FPGA daughter-card designs.
Is the male square-pin contact style of the TFC-125-02-LM-D-K-TR interchangeable with other SAMTEC 0.050 inch pitch receptacle series?
The TFC-125-02-LM-D-K-TR uses a 0.025 inch (0.64 mm) square male pin at 0.050 inch (1.27 mm) pitch, which mates directly with SAMTEC TFM (Tiger Eye Female Mating) receptacle housings rated for the same 1 A per contact and 125 V working voltage. It is also mechanically compatible with SAMTEC SFM and other industry-standard 0.050 inch pitch female terminal strips using a 0.025 inch square socket contact. This broad interoperability means the TFC-125-02-LM-D-K-TR can replace legacy 0.050 inch male headers from other vendors without PCB re-layout.
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| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 500+ | $4.8500 | $2425.00 |
| 1000+ | $3.7500 | $3750.00 |
| 2500+ | $2.6600 | $6650.00 |
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