TST-120-03-S-D SAMTEC Connector (Other) In Stock
SAMTEC TST-120-03-S-D is a 40-position shrouded dual-row PCB header with 0.100" pitch, gold over nickel contact finish, and through-hole termination. Body measures 2.3 inch length for robust board-to-wire and board-to-board connections. From $3.00 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 40
- Lifecycle
- ACTIVE
- Datasheet
- TST-120-03-S-D Datasheet PDF
- Category
- Connector
- Price
- From $4.0563(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-S-D?
- 40-position shrouded dual-row PCB header at 0.100" (2.54 mm) pitch with gold (30 µin) over nickel (50 µin) mating contact finish for reliable low-resistance connections
- Polarizing shroud prevents incorrect mating orientation and protects 40 male contacts from mechanical damage during handling and assembly
- Through-hole termination with tin over nickel barrier provides robust solder joint strength suitable for high-vibration and repeated mating environments
What is TST-120-03-S-D used for?
The TST-120-03-S-D is widely used in industrial control panels, power supply boards, and embedded computing systems requiring secure 40-pin wire-to-board or board-to-board connectivity at 2.54 mm pitch. Its shrouded design protects male contacts during cable assembly and prevents reverse insertion errors, reducing field failures in mission-critical equipment. The standard 0.100 inch pitch and through-hole termination make it compatible with a broad range of mating IDC cable connectors and female socket strips.
What are the specifications of TST-120-03-S-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 (30) OVER NICKEL (50) |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | NOT SPECIFIED |
| 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 |
| Plating Thickness | 30u 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-S-D datasheet?
TST-120-03-S-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-120-03-S-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact plating does the TST-120-03-S-D use and why does it matter for connector reliability?
The TST-120-03-S-D features gold (30 microinch) over nickel (50 microinch) on the mating contacts, which provides corrosion resistance, stable contact resistance below 20 milliohms, and extended mating cycle life compared to tin-plated alternatives, critical for 40-position headers in test fixtures and frequently mated equipment.
How does the shrouded housing of the TST-120-03-S-D improve field installation compared to unshrouded headers?
The shroud on TST-120-03-S-D physically guides the mating connector into correct alignment and prevents reverse insertion, eliminating a common source of connector damage across 40 pins during cable assembly in the field, where misalignment can bend multiple contacts simultaneously and cause costly board failures.
What is the body length of the TST-120-03-S-D and how does it affect PCB layout planning?
The TST-120-03-S-D body measures 2.3 inches (approximately 58 mm) in length, which requires a dedicated keep-out zone along that dimension on the PCB. Designers must account for this length when routing traces and placing components adjacent to the 40-pin header, particularly in compact embedded control board layouts.
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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+ | $7.9300 | $7.93 |
| 25+ | $7.1680 | $179.20 |
| 50+ | $6.9100 | $345.50 |
| 100+ | $5.6600 | $566.00 |
| 500+ | $4.8627 | $2431.33 |
| 1000+ | $4.0563 | $4056.29 |
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