TST-128-03-L-D SAMTEC Connector (Other) In Stock
The SAMTEC TST-128-03-L-D is a 56-position shrouded PCB header with 0.100 inch pitch dual-row male square pin contacts, gold-over-nickel mating finish, and tin-nickel barrier termination in a 3.1 inch body. Designed for reliable through-hole board-to-board and cable-to-board signal interconnect, its shroud protects contacts and guides mating connectors. Available from authorized distributors with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 56
- Lifecycle
- ACTIVE
- Datasheet
- TST-128-03-L-D Datasheet PDF
- Category
- Connector
- Price
- From $2.5300(MOQ 500)
- 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-L-D?
- 56-position dual-row shrouded header at 0.100 inch pitch provides 56 contacts in a protected 3.1 inch x 0.365 inch housing, preventing contact damage during repeated mating
- Gold (10 microinch) over nickel mating finish on square pin contacts ensures low and stable contact resistance across hundreds of mating cycles in demanding environments
- Integrated polarized shroud guides mating socket connectors into correct alignment, eliminating mis-insertion across all 56 positions and preventing PCB or connector damage
What is TST-128-03-L-D used for?
The TST-128-03-L-D is used in industrial backplane assemblies, embedded computing systems, and test and measurement equipment requiring a robust 56-position through-hole header for board-to-board or cable-to-board interconnect. Its shrouded, keyed housing prevents misalignment during field service and automated assembly, making it well suited for rack-mount chassis, servo drive controllers, and data acquisition systems. The gold-plated mating contacts ensure long-term signal integrity in high-cycle connector interfaces such as module replacement and system reconfiguration.
What are the specifications of TST-128-03-L-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 |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| 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 | 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-L-D datasheet?
TST-128-03-L-D Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for TST-128-03-L-D?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the significance of the 10 microinch gold mating finish on the TST-128-03-L-D contacts for long-term connector reliability?
A 10 microinch gold (Au) over nickel mating finish provides a low and stable contact resistance, typically below 20 milliohms, over hundreds to thousands of mating cycles. This protects the 56 square pin contacts from oxidation, fretting corrosion, and wear in the TST-128-03-L-D, making it far more reliable than tin-only mated contacts in applications such as test fixtures or field-replaceable modules that are disconnected and reconnected frequently.
How does the shroud on the TST-128-03-L-D protect the connector during PCB handling and cable-to-board assembly?
The integrated shroud surrounds all 56 male square pin contacts, protecting them from mechanical damage during PCB handling, shipping, and storage before mating. During assembly, the shroud's alignment guides ensure the 0.100 inch pitch mating socket seats correctly across all 56 positions in the 3.1 inch body, preventing bent pins or partial insertions that would create open circuits or increased contact resistance in the board-to-board interface.
When would a designer choose the TST-128-03-L-D over an unshrouded 56-pin header of equivalent pitch?
The TST-128-03-L-D is preferred over an unshrouded header in any application where the mating connector may be installed under poor lighting, by non-technical personnel, or in systems subject to vibration that could shift the cable connector off-center before locking. The shroud's polarization key prevents the 56-position mating socket from being inserted 180° reversed, which would short-circuit signals and potentially damage ICs connected to the 0.100 inch pitch header in backplane or daughtercard assemblies.
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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 |
|---|---|---|
| 500+ | $4.1000 | $2050.00 |
| 1000+ | $3.3700 | $3370.00 |
| 2500+ | $2.5300 | $6325.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
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