TFM-123-04-SM-D-LC SAMTEC Connector (Other) In Stock
SAMTEC TFM-123-04-SM-D-LC is a 46-position high-reliability Tiger Eye dual-row surface mount terminal strip at 0.050 inch pitch with board lock, featuring gold flash over nickel contacts for secure, dense PCB interconnection.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 46
- Lifecycle
- ACTIVE
- Datasheet
- TFM-123-04-SM-D-LC Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 46-position dual-row configuration at 0.050 inch (1.27 mm) pitch achieves high signal density in a compact 1.150 inch body length suitable for space-constrained PCB layouts
- Board lock (LC suffix) provides mechanical retention during SMT reflow, preventing 46-position connector shift on solder paste at peak reflow temperatures up to 260 degrees C
- Tiger Eye gold flash over nickel mating contacts deliver reliable low-resistance signal connections across the full rated mating cycle life
Applications
The TFM-123-04-SM-D-LC suits high-density board-to-board interconnect in networking switch cards, storage controllers, and embedded computing modules where 46 signal positions at 0.050 inch pitch minimize connector footprint. The board lock ensures stable placement during lead-free SMT reflow, making it a reliable choice for automated production lines with tight process windows. Medical imaging boards and portable test instrumentation also use this connector to maximize contact count within a small PCB area.
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
For a 46-signal parallel interface on a storage controller PCB, how does TFM-123-04-SM-D-LC minimize board area usage?
The TFM-123-04-SM-D-LC packs 46 positions into a dual-row footprint only about 1.150 inches (29.2 mm) long at 0.050 inch pitch, compared to roughly 2.3 inches required for a single-row 0.100 inch pitch connector carrying the same 46 signals. This space saving allows storage controller designers to reduce connector zone area by over 50 percent, freeing PCB real estate for decoupling capacitors and signal trace routing.
How does the board lock on TFM-123-04-SM-D-LC improve SMT assembly yield for 46-position fine-pitch connectors?
The LC board lock pegs press into PCB holes before reflow, anchoring the connector against surface tension and thermal expansion forces during the reflow profile that peaks at 260 degrees C for lead-free solder. Without the lock, a 46-position 0.050 inch pitch connector can shift by as little as 0.025 mm during reflow and cause up to 20 percent of pins to misalign, producing opens or bridges that require costly rework.
In what design scenario would a developer choose TFM-123-04-SM-D-LC over a 40-position TFM-120 variant?
A developer should select the TFM-123-04-SM-D-LC over a 40-position variant when the interface requires exactly 46 conductors, such as a 32-bit data bus with 8 address lines, 4 control signals, and 2 power pins, with no spare positions wasted. Selecting the correct count eliminates unused pads that complicate PCB DFM review and avoids routing additional interconnect signals through a second connector.
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