TST-109-04-G-D SAMTEC Connector (Other) In Stock
SAMTEC TST-109-04-G-D is an 18-position dual-row shrouded PCB header with 0.100" pitch and gold-plated contacts. Its polarizing shroud ensures correct cable-side connector orientation for wire-to-board and board-to-board assemblies. Available from global distributors with competitive pricing and worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- TST-109-04-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-109-04-G-D?
- 18-position dual-row shrouded header on 0.100" (2.54 mm) pitch with polarizing key to prevent misconnection
- Gold (G suffix) plated contacts provide low contact resistance below 20 mΩ and superior corrosion resistance for long service life
- Through-hole termination delivers robust mechanical retention exceeding 50 N pull force per contact row for vibration-resistant assemblies
What is TST-109-04-G-D used for?
The TST-109-04-G-D is used in test and measurement equipment, industrial control panels, and prototyping boards where a reliable 18-position shrouded header accommodates ribbon cable or discrete wire harnesses. Its dual-row 0.100" pitch layout provides sufficient signal and power contacts for interfacing microcontrollers, FPGAs, and sensor modules with external peripherals. Gold plating on the contacts ensures signal integrity across thousands of mating cycles in lab environments and field-replaceable module designs.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Where can I find the TST-109-04-G-D datasheet?
TST-109-04-G-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-109-04-G-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many mating cycles are the gold-plated contacts of the TST-109-04-G-D rated for, and why does gold plating matter in test environments?
SAMTEC TST series gold (G suffix) contacts are rated for a minimum of 100 mating cycles with contact resistance maintained below 20 mΩ throughout. In test and measurement applications where connectors are mated and unmated frequently during development or calibration, gold plating prevents oxide buildup that would increase contact resistance on base metal contacts — ensuring clean, repeatable electrical connections across all 18 positions.
For a dual-row ribbon cable interface, what cable-side connector mates with the TST-109-04-G-D on 0.100" pitch?
The TST-109-04-G-D on 0.100" (2.54 mm) pitch accepts SAMTEC's FFSD or IDC connector families as the cable-side mate, designed for 28 AWG flat ribbon cable with a 0.050" wire spacing. The 18-position dual-row format on 2.54 mm pitch also accepts standard IDC crimp connectors from other manufacturers with the same footprint, making it compatible with off-the-shelf 18-position ribbon cable assemblies and development tool interfaces like JTAG debug cables.
In what way does the shroud on TST-109-04-G-D protect signal integrity during PCB assembly compared to unshrouded headers?
The polarizing shroud on the TST-109-04-G-D acts as a physical guide that aligns the mating connector and prevents partial or sideways insertion across all 18 positions simultaneously. Without a shroud, dual-row 0.100" headers risk one row offset misconnection, which on a 3.3 V or 5 V powered bus can short power rails or invert address lines — causing irreversible component damage. The shroud also protects the 2.54 mm pitch gold-plated contact tips from physical damage during PCB handling.
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