QTT-149-02-L-T SAMTEC Connector (Other) In Stock
SAMTEC QTT-149-02-L-T is a 147-position, 2.00 mm pitch board-stacking power plane terminal strip with phosphor-bronze contacts finished in 10 µ" gold over nickel for reliable mating and tin-nickel termination, spanning a 3.881" body length for high-current backplane interconnects. Available in stock with worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 147
- Lifecycle
- ACTIVE
- Datasheet
- QTT-149-02-L-T Datasheet PDF
- Category
- Connector
- Price
- From $19.7300(MOQ 50)
- 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 QTT-149-02-L-T?
- 147-position board-stacking connector at 2.00 mm pitch, delivering a high-density power and signal interconnect in a single 3.881-inch body length for compact backplane designs
- Gold (10 µin) over Nickel contact finish on mating surfaces ensures low and stable contact resistance across thousands of mating cycles in demanding server and telecom applications
- Phosphor bronze contact material provides high spring force and resilience, maintaining consistent 2.00 mm pitch contact pressure over temperature cycling from -55°C to +125°C
- RoHS-compliant (Pb-free) tin-nickel termination finish supports lead-free solder assembly processes and meets global environmental compliance requirements
What is QTT-149-02-L-T used for?
QTT-149-02-L-T is used in server backplane assemblies, ATCA and VME chassis, and high-density FPGA daughter-card stacks where a 147-position 2.00 mm pitch power plane connector provides simultaneous power distribution and signal routing across multiple PCB layers. Telecom equipment designers use this connector family to interconnect line cards and switch fabric boards where the gold-plated contacts guarantee low resistance on power rails supplying up to several amperes per pin. Defense electronics and data center switching platforms also leverage the robust phosphor-bronze construction for board-to-board stacking in environments subject to vibration and wide temperature excursions.
What are the specifications of QTT-149-02-L-T?
| Pbfree Code | Yes |
| YTEOL | 8 |
| Body Breadth | 0.236inch |
| Body Depth | 0.355inch |
| Body Length | 3.881inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD (10) OVER NICKEL |
| Contact Finish Termination | Tin (Sn) - with Nickel (Ni) barrier |
| Contact Gender | MALE |
| Contact Material | PHOSPHOR BRONZE |
| Contact Style | SQ PIN-SKT |
| DIN Conformance | NO |
| Filter Feature | NO |
| IEC Conformance | NO |
| Insulator Color | BLACK |
| Insulator Material | LIQUID CRYSTAL POLYMER |
| JESD-609 Code | e3 |
| MIL Conformance | NO |
| Mating Information | MULTIPLE MATING PARTS AVAILABLE |
| Mixed Contacts | NO |
| Mounting Style | STRAIGHT |
| Mounting Type | BOARD |
| Number Of Connectors | ONE |
| Number of Rows Loaded | 3 |
| Option | GENERAL PURPOSE |
| Plating Thickness | 10u inch |
| Reference Standard | UL |
| Terminal Length | 0.09inch |
| Terminal Pitch | 2mm |
| Termination Type | SOLDER |
| Total Number of Contacts | 147 |
| 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 QTT-149-02-L-T datasheet?
QTT-149-02-L-T Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for QTT-149-02-L-T?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What contact pitch and body length does QTT-149-02-L-T use, and how does this affect backplane layout density?
QTT-149-02-L-T uses a 2.00 mm contact pitch across 147 positions, yielding a total mating body length of approximately 3.881 inches (98.6 mm). Compared to legacy 2.54 mm pitch connectors, the 2.00 mm pitch reduces the linear footprint by about 21%, allowing more signal and power contacts per unit length on ATCA or VME backplane PCBs where connector row spacing is constrained to under 110 mm.
How does the 10 µin gold contact finish on QTT-149-02-L-T contribute to reliable power plane connections in server backplanes?
The 10 µin gold over nickel mating contact finish on QTT-149-02-L-T maintains contact resistance below 10 mΩ per pin even after 500 or more mating cycles, preventing resistive heating on high-current power plane pins that may carry 1 A to 3 A each. Gold's immunity to oxidation also ensures stable resistance in humid data center environments where base metal contacts would develop surface films that increase resistance and cause voltage drop on 12 V or 48 V supply rails.
What mechanical advantage does the phosphor-bronze contact material of QTT-149-02-L-T provide over brass contacts in board-stacking applications?
Phosphor bronze has a higher elastic modulus and yield strength than standard brass, allowing QTT-149-02-L-T's contacts to maintain their designed spring force of approximately 50 gf to 100 gf per pin across temperature swings from -55°C to +125°C without permanent deformation. For a 147-position connector, this means the total insertion and extraction force remains predictable and within JEDEC guidelines across thousands of mating cycles, which is critical for hot-swap server blade applications where partial insertion can cause momentary open-circuit events.
When should a board designer select QTT-149-02-L-T over two separate smaller connectors to cover the same 147-pin requirement?
Using a single QTT-149-02-L-T instead of two 74-position connectors eliminates one connector seam at the midpoint, which in 2.00 mm pitch power plane designs can introduce a 0.5 mm to 1.0 mm gap that misaligns the power plane copper pour and creates a current bottleneck. The single-body solution also saves approximately 2 mm of PCB length and reduces BOM line items by one, simplifying procurement and assembly validation for the 147-pin interface.
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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 |
|---|---|---|
| 50+ | $28.2700 | $1413.50 |
| 100+ | $21.9200 | $2192.00 |
| 250+ | $19.7300 | $4932.50 |
In Stock · 24h Response · Worldwide Shipping
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