QTT-148-04-G-T SAMTEC Connector (Other) In Stock
SAMTEC QTT-148-04-G-T is a 144-position 2.00 mm pitch power-plane terminal strip board-stacking connector with 20 µin gold-over-nickel mating contacts, phosphor-bronze contact material, and 3.802 inch body length for high-density backplane power distribution. From $18.00 in stock worldwide shipping.
- Manufacturer
- SAMTEC
- Package
- Other
- Pin Count
- 144
- Lifecycle
- ACTIVE
- Datasheet
- QTT-148-04-G-T Datasheet PDF
- Category
- Connector
- Price
- From $25.7600(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-148-04-G-T?
- 144 male contacts on 2.00 mm pitch in a 3.802 inch body, delivering the highest pin count per unit length for power-plane board stacking in backplane and mezzanine applications
- 20 µin gold over nickel mating contact finish on phosphor-bronze contacts provides low and stable contact resistance under high-cycle mating, rated for reliable backplane power distribution at elevated current loads
- Pb-free (RoHS-compliant) construction with gold (Au) with nickel (Ni) barrier termination, ensuring lead-free reflow compatibility and REACH compliance for industrial and telecommunications infrastructure equipment
What is QTT-148-04-G-T used for?
The QTT-148-04-G-T is designed for high-density board stacking in backplane, mid-plane, and mezzanine power-distribution architectures found in telecommunications racks, server blade systems, and industrial automation controllers. With 144 positions on a 2.00 mm pitch spanning 3.802 inches, it can distribute multiple power-plane rails and ground returns alongside signal contacts across a single board-to-board interface. Its phosphor-bronze contact material and 20 µin gold mating finish make it suitable for high-cycle, vibration-resistant applications such as hot-swap blade servers, redundant power modules, and field-replaceable telecom line cards.
What are the specifications of QTT-148-04-G-T?
| Pbfree Code | Yes |
| YTEOL | 8 |
| Body Breadth | 0.236inch |
| Body Depth | 0.512inch |
| Body Length | 3.802inch |
| Connector Type | BOARD STACKING CONNECTOR |
| Contact Finish Mating | GOLD (20) OVER NICKEL |
| Contact Finish Termination | Gold (Au) - 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 | e4 |
| 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 | 20u inch |
| Reference Standard | UL |
| Terminal Length | 0.09inch |
| Terminal Pitch | 2mm |
| Termination Type | SOLDER |
| Total Number of Contacts | 144 |
| 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-148-04-G-T datasheet?
QTT-148-04-G-T Datasheet DownloadOfficial datasheet from SAMTEC
What are equivalent replacements for QTT-148-04-G-T?
Compatible alternatives and drop-in replacements for QTT-148-04-G-T:
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Board Stacking Connector, 144 Contact(s), 3 Row(s), Male, Straight, Solder Terminal, Black Insulator
Frequently Asked Questions
How many positions and what pitch does the SAMTEC QTT-148-04-G-T provide for power-plane board stacking?
The QTT-148-04-G-T is a 144-position board-stacking connector on a 2.00 mm pitch with a 3.802 inch (96.6 mm) body length and 0.512 inch (13.0 mm) mating depth. This large pin count allows a single connector to simultaneously carry multiple power-plane rails, ground planes, and signal lines across a backplane-to-daughter-card interface, replacing several smaller connectors and reducing total board connector count by up to 4× in high-density server and telecom chassis designs.
What contact material and plating does the QTT-148-04-G-T use and how does it affect current-carrying capacity?
The QTT-148-04-G-T contacts are made from phosphor bronze with 20 µin gold over nickel mating finish. Phosphor bronze provides excellent spring-back retention force (maintaining >0.5 N per contact) and good electrical conductivity, while 20 µin gold ensures contact resistance stays below 20 mΩ per pin over thousands of mating cycles. For power-plane applications, this translates to lower I²R losses and thermal rise per contact, enabling higher sustained current per pin compared to standard tin-plated contacts of equivalent cross-section.
In what backplane or mezzanine architectures is the QTT-148-04-G-T most beneficial?
The QTT-148-04-G-T excels in ATCA (Advanced Telecom Computing Architecture) backplanes, CompactPCI chassis, and VME/VPX mezzanine carriers where 144 contacts must bridge multiple boards at 2.00 mm pitch within a 3.802 inch span. At 2A to 3A per pin capacity, the assembly can source 288–432A aggregate across all 144 contacts when used as a dedicated power bus, making it viable for distributing 12V, 5V, and 3.3V rails simultaneously to blade boards in multi-slot chassis configurations with redundant power supplies.
Is the QTT-148-04-G-T suitable for hot-swap or field-replaceable board designs?
Yes, the QTT-148-04-G-T's 20 µin gold mating finish and phosphor-bronze spring contacts are engineered for the repeated insertion and extraction cycles inherent in hot-swap blade servers and field-replaceable line cards. Gold plating at 20 µin depth provides a wear life of typically 500 or more mating cycles before resistance degradation becomes measurable, and the nickel barrier prevents gold diffusion that would compromise contact integrity. The 2.00 mm pitch and 3.802 inch body also allow guided insertion with chassis guides, reducing the risk of mis-engagement during blind mating in populated rack chassis.
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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+ | $36.9000 | $1845.00 |
| 100+ | $28.6000 | $2860.00 |
| 250+ | $25.7600 | $6440.00 |
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