TST-109-05-G-D SAMTEC Connector (Other) In Stock
SAMTEC TST-109-05-G-D is an 18-position dual-row shrouded PCB header with 0.100" (2.54 mm) pitch and gold contact finish for reliable board-to-board interconnection. The full shroud provides mechanical polarization and contact protection in industrial and embedded computing applications. Available in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- TST-109-05-G-D Datasheet PDF
- Category
- Connector
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TST-109-05-G-D?
- 18 contacts (9 positions dual-row) at 0.100" (2.54 mm) pitch in a compact shrouded header for board-to-board signal routing
- Gold (G) contact finish providing low contact resistance below 20 mΩ and extended service life across multiple mating cycles
- Full polarized shroud preventing mis-mating and protecting contacts from mechanical damage during blind assembly operations
What is TST-109-05-G-D used for?
The TST-109-05-G-D serves compact embedded systems, sensor interface boards, and industrial module interconnections requiring 18 signals with full mechanical polarization. Its 0.100" pitch and dual-row layout fit standard ribbon cable connectors and IDC sockets, simplifying cable harness integration in PLC, robotics, and test equipment designs. The shrouded header is also well-suited for daughter card expansion slots in medical devices and communication gateways requiring repeated plug-unplug serviceability.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TST-109-05-G-D datasheet?
TST-109-05-G-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-109-05-G-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
Which ribbon cable or IDC socket mates directly with the TST-109-05-G-D, and what cable assembly pitch is required?
The TST-109-05-G-D mates with standard 18-pin IDC socket connectors designed for 0.100" (2.54 mm) pitch, such as SAMTEC's FTSH or compatible third-party IDC housings accepting 28 AWG or 26 AWG flat ribbon cable. The 9-position dual-row layout also accepts crimped socket assemblies on the same 2.54 mm grid, enabling both ribbon cable and discrete wire-to-board harness configurations for flexible prototyping and field wiring.
How does the gold contact finish on the TST-109-05-G-D affect connector life in high-humidity environments compared to tin-plated alternatives?
The gold (G) contact finish on the TST-109-05-G-D provides superior corrosion resistance in humid environments rated up to 95% relative humidity, maintaining contact resistance below 20 mΩ without oxide formation that afflicts tin-plated contacts over time. In coastal industrial installations or HVAC control systems exposed to condensation, gold-finished contacts can extend reliable service life from the typical 2 to 3 years of tin contacts to 10 or more years without requiring cleaning or re-tensioning.
For a 16-bit microcontroller expansion bus at 3.3 V, is 18 pins sufficient or should a larger TST variant be selected?
An 18-pin TST-109-05-G-D accommodates a 16-bit data bus plus 2 control lines such as chip-select and clock, making it a minimal but functional choice for direct GPIO expansion at 3.3 V logic levels rated up to 500 mA total connector current. If the design also requires separate address lines, interrupt signals, or power rails alongside the 16-bit bus, a larger 26-pin TST-113 or 34-pin TST-117 variant in the same 0.100" pitch family would provide the necessary additional contacts without changing the connector footprint style.
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