TST-120-03-G-D SAMTEC Connector (Other) In Stock
SAMTEC TST-120-03-G-D is a 40-position dual-row shrouded PCB header with 2.54 mm (0.100 inch) pitch, gold-over-nickel contact finish, and 2.3 inch body length, designed for reliable keyed board-to-cable and board-to-board connections in industrial and embedded systems.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- TST-120-03-G-D Datasheet PDF
- Category
- Connector
- Price
- From $4.2922(MOQ 1)
- Temp Range
- -55.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TST-120-03-G-D?
- 40-position dual-row shrouded header with 2.54 mm pitch preventing incorrect mating orientation
- Gold (10 µin) over nickel (50 µin) contact finish ensuring low resistance and durability
- 2.3 inch body length accommodating 20 contacts per row for high-density signal routing
- RoHS-compliant and available with 1-week factory lead time for fast procurement
What is TST-120-03-G-D used for?
The TST-120-03-G-D shrouded PCB header is suited for keyed ribbon-cable and IDC connector mating in industrial control systems, development boards, and embedded computer modules requiring reliable 40-position connectivity at 2.54 mm pitch. Its shroud prevents mis-insertion during field wiring, making it ideal for backplane interface connectors, JTAG and programming headers, and parallel bus connections in automation equipment and single-board computers.
What are the specifications of TST-120-03-G-D?
| Pbfree Code | Yes |
| Factory Lead Time | 1Week |
| YTEOL | 9.1 |
| Body Breadth | 0.365inch |
| Body Depth | 0.365inch |
| Body Length | 2.3inch |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | GOLD (10) OVER NICKEL (50) |
| Contact Finish Termination | Gold (Au) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | PHOSPHOR BRONZE |
| Contact Pattern | RECTANGULAR |
| Contact Style | SQ PIN-SKT |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulation Resistance | 5000000000Ω |
| Insulator Color | BLACK |
| Insulator Material | GLASS FILLED POLYESTER |
| JESD-609 Code | e4 |
| MIL Conformance | NO |
| Mating Contact Pitch | 0.1inch |
| Mating Contact Row Spacing | 0.1inch |
| 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 | 2.54mm |
| Plating Thickness | 10u inch |
| Polarization Key | POLARIZATION NOTCH |
| Terminal Length | 0.565inch |
| Terminal Pitch | 2.54mm |
| Termination Type | SOLDER |
| Total Number of Contacts | 40 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
| Country of Origin | Malaysia, USA |
Where can I find the TST-120-03-G-D datasheet?
TST-120-03-G-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-120-03-G-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the shrouded design of the TST-120-03-G-D reduce field-wiring errors compared to unshrouded headers?
The shroud on the TST-120-03-G-D physically guides mating IDC or ribbon-cable connectors into the correct 40-position alignment, preventing reversed or offset insertions that cause immediate circuit damage. In field-serviced industrial panels with 2.54 mm pitch ribbon cables, shrouded headers reduce wiring errors by enforcing single-orientation mating across all 40 contacts.
What mating connector families are compatible with the TST-120-03-G-D for cable assembly in embedded systems?
The TST-120-03-G-D mates with standard 2.54 mm pitch IDC cable connectors such as 3M 89120, TE Connectivity 1658621-1, and compatible 40-pin dual-row housings. At 0.100 inch pitch, it also accepts flat ribbon cables terminated with 40-way IDC plugs, supporting typical wire gauges of 28 AWG in a 1.27 mm ribbon pitch.
How does the gold contact finish of the TST-120-03-G-D affect its suitability for low-signal-level JTAG or SPI interfaces?
Gold plating (10 µin gold over 50 µin nickel) on the TST-120-03-G-D maintains contact resistance below 20 mΩ even at the low contact forces of 40-position headers. For JTAG, SPI, and UART debug interfaces carrying signal voltages of 1.8 V to 3.3 V at currents below 10 mA, gold contacts prevent oxide-induced signal degradation through the product lifecycle.
With a 1-week factory lead time, how does the TST-120-03-G-D fit into rapid prototype and NPI procurement schedules?
The 1-week lead time of the TST-120-03-G-D allows rapid procurement for new product introduction builds without the 12-week delays common for specialty connectors. Engineering teams can order the 40-position shrouded header mid-sprint and receive it before the next board spin, supporting agile hardware development cycles for embedded system prototypes.
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About SAMTEC
SAMTEC is a leading electronic component manufacturer. FindMyChip sources SAMTEC ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $7.7600 | $7.76 |
| 50+ | $7.6610 | $383.05 |
| 100+ | $7.3000 | $730.00 |
| 500+ | $5.9700 | $2985.00 |
| 1000+ | $5.1277 | $5127.71 |
| 2500+ | $4.2922 | $10730.55 |
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