TST-120-03-T-D SAMTEC Connector (Other) In Stock
TST-120-03-T-D is a 40-position dual-row shrouded PCB header from SAMTEC with 0.100-inch (2.54 mm) pitch, featuring phosphor bronze male contacts with matte tin over nickel finish and a polarized shroud body measuring 2.3 inches in length for reliable 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-T-D Datasheet PDF
- Category
- Connector
- Price
- From $1.4240(MOQ 1)
- Temp Range
- -55.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TST-120-03-T-D?
- 40-position dual-row shrouded header on 0.100-inch (2.54 mm) pitch for standard IDC ribbon cable mating
- Phosphor bronze contacts with matte tin over nickel finish providing reliable low-resistance connections
- Polarized shroud body (2.3-inch length) preventing mis-keyed cable insertion in dense cable assembly environments
- SAMTEC TST series construction compatible with industry-standard 40-pin IDC connectors and flat ribbon cables
What is TST-120-03-T-D used for?
TST-120-03-T-D is commonly used as a board-mounted header for IDC ribbon cable assemblies in embedded computing, industrial I/O expansion boards, and legacy parallel interface designs. The 40-position shrouded configuration and 0.100-inch pitch make it directly interchangeable with standard 40-pin ATA, GPIO expansion, and parallel data bus connectors used in industrial PLCs, SBCs, and development boards.
What are the specifications of TST-120-03-T-D?
| YTEOL | 9.1 |
| Body Breadth | 0.365inch |
| Body Depth | 0.365inch |
| Body Length | 2.3inch |
| Connector Type | BOARD CONNECTOR |
| Contact Finish Mating | MATTE TIN OVER NICKEL (50) |
| Contact Finish Termination | Tin (Sn) - 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 | e3 |
| 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 |
| 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-T-D datasheet?
TST-120-03-T-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-120-03-T-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many positions does TST-120-03-T-D provide and what is its contact pitch?
TST-120-03-T-D has 40 positions arranged in a dual-row format with a 0.100-inch (2.54 mm) pitch. This is the standard pitch for IDC ribbon cable assemblies, making the connector directly compatible with a wide range of 40-pin flat-flex cables and crimp-on IDC socket housings used in industrial and embedded system designs.
What contact material and finish does TST-120-03-T-D use, and how does that affect solderability?
The contacts are phosphor bronze with a matte tin over nickel barrier termination. Tin-over-nickel termination is compatible with standard lead-free wave solder and hand soldering processes. The nickel barrier prevents tin whisker migration and maintains joint reliability during thermal cycling in the -40 °C to +85 °C operating range typical of industrial PCB assemblies.
Why is the shrouded design of TST-120-03-T-D important in cable-harness-intensive industrial installations?
The polarized plastic shroud around the 40 male pins prevents reversed or misaligned cable insertion, which in a 40-position connector could short critical signals or damage ICs. The shroud body measures 2.3 inches long and 0.365 inches wide, providing clear physical keying that cable assembly technicians can rely on even in low-visibility or high-density wiring environments common in PLC and CNC machine panels.
Is TST-120-03-T-D a suitable replacement for standard 40-pin ATA or GPIO expansion headers?
Yes. The 40-position dual-row 0.100-inch pitch shrouded header is dimensionally compatible with industry-standard 40-pin IDE/ATA connectors and the 40-pin GPIO expansion header format used on many single-board computers and development platforms. Designers should verify pin-1 orientation and the shroud polarity tab position, but the 2.54 mm pitch and 20 pins per row are standard across these interface families.
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Why Buy from FindMyChip
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+ | $4.1300 | $4.13 |
| 100+ | $2.9460 | $294.60 |
| 500+ | $2.6190 | $1309.50 |
| 1000+ | $2.0600 | $2060.00 |
| 2000+ | $1.7410 | $3481.92 |
| 5000+ | $1.4240 | $7119.75 |
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