TFM-138-21-SM-D SAMTEC Connector (Other) In Stock
SAMTEC TFM-138-21-SM-D Tiger Eye surface-mount dual-row terminal strip with 0.050-inch pitch delivering high-density board-to-board and mezzanine interconnections. Gold-plated Tiger Eye contacts rated at 1 A per pin and 125 V AC maintain stable signal paths across hundreds of insertion cycles. Eliminates through-hole drilling for lower PCB fabrication cost in aerospace, defense, and industrial applications.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 76
- Lifecycle
- ACTIVE
- Datasheet
- TFM-138-21-SM-D Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TFM-138-21-SM-D?
- Surface-mount (SM) dual-row 0.050-inch pitch layout eliminates through-hole drilling, reducing PCB fabrication cost while doubling pin density versus single-row configurations
- Tiger Eye gold-plated contact system sustains contact resistance below 30 mohm across hundreds of mating cycles, meeting mission-critical reliability requirements in aerospace and defense
- Compatible with automated SMT reflow soldering at up to 260°C peak temperature, enabling seamless integration into high-volume pick-and-place assembly lines
What is TFM-138-21-SM-D used for?
The SAMTEC TFM-138-21-SM-D is optimized for surface-mount board-to-board and mezzanine interconnections in aerospace computing, military embedded systems, and high-reliability industrial equipment where consistent signal integrity across repeated mating cycles is essential. Its 0.050-inch pitch dual-row configuration enables dense signal and power routing on FMC daughter cards and rugged module boards operating from -55°C to +125°C. The surface-mount design removes through-hole constraints, allowing component population on both PCB sides and simplifying multi-layer board stack-up in compact system designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TFM-138-21-SM-D datasheet?
TFM-138-21-SM-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TFM-138-21-SM-D?
Compatible alternatives and drop-in replacements for TFM-138-21-SM-D:
Board Connector, 76 Contact(s), 2 Row(s), Male, Right Angle, 0.05 inch Pitch, Solder Terminal
Board Connector, 76 Contact(s), 2 Row(s), Male, Right Angle, 0.05 inch Pitch, Solder Terminal
Frequently Asked Questions
How does the surface-mount design of the TFM-138-21-SM-D simplify PCB integration compared to through-hole Tiger Eye terminal strips?
The TFM-138-21-SM-D surface-mount variant eliminates through-hole drilling by using SMT solder pads, cutting PCB fabrication cost while preserving the 0.050-inch pitch and 1 A per pin current rating of the Tiger Eye series. It supports automated reflow soldering at up to 260°C peak temperature and allows component placement on both PCB sides, providing greater layout flexibility for compact mezzanine and daughter card designs.
Which rugged embedded computing platforms are best served by the dual-row 0.050-inch pitch of the TFM-138-21-SM-D?
The TFM-138-21-SM-D is ideal for signal and power distribution on 3U or 6U VPX mezzanine modules, FMC daughter cards, and radar processing boards where the dual-row 0.050-inch pitch concentrates a large pin count into a compact connector footprint. With a 125 V AC rating and reliable operation from -55°C to +125°C, the Tiger Eye contacts maintain signal integrity under high-vibration aerospace and defense conditions that would stress conventional SMT connectors.
When is the dual-row TFM-138-21-SM-D a stronger choice than a single-row 0.050-inch Tiger Eye strip for a high-speed mezzanine design?
The dual-row TFM-138-21-SM-D provides more than twice the pin count of a single-row strip at the same 0.050-inch pitch, which is critical for high-speed mezzanine buses operating above 100 MHz where dedicated ground pins between signal lines are required for signal integrity. This interleaved ground-signal arrangement reduces crosstalk and electromagnetic interference, and the 1 A per pin rating accommodates both high-speed data signals and auxiliary power distribution across the connector in a single compact footprint.
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