TST-128-03-G-D SAMTEC Connector (Other) In Stock
SAMTEC TST-128-03-G-D is a 56-position dual-row shrouded PCB header with 0.100 inch pitch through-hole vertical mounting. It features gold-over-nickel contact finish on phosphor bronze contacts and a 3.1 inch body length for reliable board-to-board and wire-to-board connectivity.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- TST-128-03-G-D Datasheet PDF
- Category
- Connector
- Price
- From $3.4988(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-128-03-G-D?
- 56-position dual-row shrouded header at 0.100 inch pitch provides robust mechanical keying and 56 contacts in a 3.1 inch body for dense signal routing
- Gold (10 microinch) over nickel (50 microinch) contact finish on phosphor bronze ensures low-resistance mating and excellent corrosion resistance for long-life reliability
- Through-hole vertical mounting with shrouded housing offers superior board retention and polarization, preventing mis-mating in demanding industrial and automated environments
What is TST-128-03-G-D used for?
The TST-128-03-G-D is designed for board-to-board and cable-to-board connections in industrial automation, test and measurement equipment, and embedded computing systems. Its 56-position shrouded header at 0.100 inch pitch accommodates high signal count backplane interfaces and motherboard expansion connectors. The gold-plated phosphor bronze contacts make it suitable for applications requiring thousands of mating cycles with reliable low-contact-resistance performance.
What are the specifications of TST-128-03-G-D?
| YTEOL | 9.1 |
| Body Breadth | 0.365inch |
| Body Depth | 0.365inch |
| Body Length | 3.1inch |
| 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 | 56 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8536.69.40.40 |
Where can I find the TST-128-03-G-D datasheet?
TST-128-03-G-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-128-03-G-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact finish does the TST-128-03-G-D use, and how does it affect connector longevity in high-cycle applications?
The TST-128-03-G-D features gold (10 microinch) over nickel (50 microinch) contact finish on phosphor bronze contacts. This gold plating minimizes oxidation and contact resistance, supporting thousands of mating cycles without performance degradation. It is the preferred finish for high-reliability applications such as test fixtures or field-replaceable I/O modules where connectors are mated and unmated frequently.
How does the shrouded housing of TST-128-03-G-D protect against mis-mating in dense connector fields?
The TST-128-03-G-D shrouded housing surrounds all 56 pins across its 3.1 inch body length, providing a mechanical keying wall that guides the mating receptacle into the correct orientation. This prevents bent pins and reversed connections during assembly, which is critical in 0.100 inch pitch dual-row configurations where off-by-one insertion errors can damage components in industrial and backplane applications.
For a backplane design needing 56 signal lines, when is TST-128-03-G-D preferable to higher-density 0.050 inch pitch alternatives?
The TST-128-03-G-D at 0.100 inch pitch is preferable when the design uses standard ribbon cables or IDC connectors that mate to 0.100 inch headers, or when the board thickness and via drill sizes favor through-hole mounting over SMT. At 56 positions, the 3.1 inch body length is compatible with most backplane slot spacings, whereas switching to 0.050 inch pitch would require custom cable assemblies and finer PCB fabrication tolerances.
What is the body length of TST-128-03-G-D, and how should PCB keepout zones be planned around the connector?
The TST-128-03-G-D has a body length of 3.1 inches (approximately 78.7 mm) and a body breadth and depth each of 0.365 inch (9.27 mm). PCB keepout zones should extend at least 1 mm beyond the shroud perimeter on all sides, and the through-hole drill pattern for 56 pins at 0.100 inch pitch requires a cleared area of at least 80 mm x 12 mm to accommodate the dual-row footprint and soldering access.
Related Guides
CSD87313DMS Synchronous Buck Power Stage Design Guide
Design a compact CSD87313DMS synchronous buck stage with practical guidance for loss, gate drive, PCB layout, EMI, thermal validation, and sourcing.
Aug 6, 2026
STEF05SGR eFuse Selection Guide for 5 V Overcurrent Protection
Choose STEF05SGR for 5 V overcurrent protection by checking current-limit margin, inrush, thermal loss, fault response, and sourcing.
Aug 6, 2026
C0402C103K3RACTU Selection Guide: Choosing a 10 nF 0402 MLCC
Select C0402C103K3RACTU by voltage margin, X7R behavior, tolerance, 0402 assembly risk, and qualified alternatives.
Aug 4, 2026
STM32H753VIT6 MCU Selection Guide: Memory, Package, Connectivity, and Security
Choose STM32H753VIT6 by evaluating memory architecture, LQFP-100 pin fit, connectivity, security, power, and sourcing tradeoffs.
Aug 4, 2026
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+ | $6.7500 | $6.75 |
| 2+ | $4.5000 | $9.00 |
| 2000+ | $3.4988 | $6997.54 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“Response time is incredible — usually under 4 hours. They understand that production lines can't wait.”
You May Also Like
10214-6212PC
3M
Connector
1778573
Phoenix Contact
Connector
5227222-3
TE Connectivity
Connector
S4B-XH-SM4-TB(LF)(SN)
JST (JAPAN SOLDERLESS TERMINALS)
Connector
185226-2
TE Connectivity
Connector
0533980571
Molex
Connector
0360-0-15-01-34-27-10-0
Mill-Max
Connector
7850-0006PR
3M
Connector
AVB 1,5/2/12
BLOCK
Connector
N3764-5002RB
3M
Connector
N3627-6002RB
3M
Connector
N3627-5002RB
3M
Connector
N3440-6002RB
3M
Connector
929715-03-36-I
3M
Connector
929667-02-36-I
3M
Connector
929665-04-36-I
3M
Connector
929665-02-36-I
3M
Connector
929647-04-36-I
3M
Connector
929647-03-36-I
3M
Connector
7834-0006PR
3M
Connector
7826-0006PR
3M
Connector
7820-0006PR
3M
Connector
3440-5002
3M
Connector
3433-5302
3M
Connector