LINK-PP INT'L TECHNOLOGY CO., LIMITED
| Product Type | LAN Transformer / Ethernet Magnetics |
| Pin Count | 48 Pins |
| Isolation Voltage (Hi-Pot) | 1500 Vrms |
| Dimensions (L x W x H) | 27.70 x 15.36 x 7.30mm |
| Primary Inductance (OCL) | 350µH Min (with 8mA DC Bias) |
| Pin Pitch: | 1.02mm |
| Payment Terms | TT,NET30/60/90 Days |
| Supply Ability | 3KK/Month |
| Delivery Time | Stock |
| Packaging Details | T&R |
| Mounting Type | SMT (Surface Mount Technology) |
| Industry Standard | IEEE 802.3ab |
| Port Configuration | Dual Port |
| Operating Temperature | 0℃ to +70℃ |
| Speed Supported | 10/100/1000Base-T (Gigabit Ethernet) |
| P/N | QT48A03 |
| Brand Name | LINK-PP |
| Model Number | QT48A03 |
| Certification | UL,RoHS,Reach,ISO |
| Place of Origin | Guangdong,China |
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Product Specification
| Product Type | LAN Transformer / Ethernet Magnetics | Pin Count | 48 Pins |
| Isolation Voltage (Hi-Pot) | 1500 Vrms | Dimensions (L x W x H) | 27.70 x 15.36 x 7.30mm |
| Primary Inductance (OCL) | 350µH Min (with 8mA DC Bias) | Pin Pitch: | 1.02mm |
| Payment Terms | TT,NET30/60/90 Days | Supply Ability | 3KK/Month |
| Delivery Time | Stock | Packaging Details | T&R |
| Mounting Type | SMT (Surface Mount Technology) | Industry Standard | IEEE 802.3ab |
| Port Configuration | Dual Port | Operating Temperature | 0℃ to +70℃ |
| Speed Supported | 10/100/1000Base-T (Gigabit Ethernet) | P/N | QT48A03 |
| Brand Name | LINK-PP | Model Number | QT48A03 |
| Certification | UL,RoHS,Reach,ISO | Place of Origin | Guangdong,China |
| High Light | Dual Port Transformer Module ，QT48A03 Transformer Module ，SMT Ethernet Magnetics | ||
The QT48A03 1000Base-T Dual Port Transformer Module is a high-performance Gigabit Ethernet transformer module designed for dual-port 10/100/1000Base-T networking applications. Engineered to meet the IEEE 802.3ab standard, this compact SMT LAN transformer provides excellent signal integrity, electrical isolation, and EMI suppression for modern Ethernet interfaces.
Designed with 48 SMT pins and a compact footprint, the QT48A03 integrates two complete Gigabit Ethernet transformer channels into a single module, helping reduce PCB space, simplify layout, and improve manufacturing efficiency.
With a minimum 350μH primary inductance under 8mA DC bias, 1500Vrms isolation voltage, and compliance with RoHS and IR 255°C reflow soldering requirements, the QT48A03 is an ideal solution for high-density networking equipment including enterprise switches, industrial Ethernet devices, broadband gateways, and communication systems.
| Parameter | Performance |
| Turn Ratio | Tx 1:1 / Rx 1:1 (±3%) |
| Insertion Loss | -1.0 dB Max (0.5–100 MHz) |
| Return Loss | -16 dB Min (0.5–30 MHz) -14 dB Min (30.1–60 MHz) -12 dB Min (60.1–80 MHz) |
| Crosstalk | -35 dB Min (0.5–40 MHz) -30 dB Min (40.1–100 MHz) |
| CMRR | -30 dB Min (0.5–100 MHz) |
| Leakage Inductance | 0.5μH Max |
| DCR | 1.4Ω Max |
| Interwinding Capacitance | 40pF Max |
| Isolation Voltage | 1500Vrms |
| Parameter | Specification |
|---|---|
| Part Number | QT48A03 |
| Product Type | 1000Base-T Dual Port Transformer Module |
| Transformer Type | Gigabit LAN Transformer |
| Ethernet Standard | IEEE 802.3ab |
| Network Speed | 10/100/1000Base-T |
| Port Configuration | Dual Port |
| Mounting Type | Surface Mount (SMT) |
| Package | 48 Pins |
| Primary Inductance | 350μH Min @ 8mA DC Bias |
| Turn Ratio | Tx 1:1 / Rx 1:1 |
| Hi-Pot Isolation | 1500Vrms |
| Operating Temperature | 0°C to +70°C |
| Storage Temperature | -25°C to +125°C |
| Reflow Rating | IR 255°C Peak |
| Environmental Compliance | RoHS |
| Item | Dimension |
| Package Length | 27.70 ±0.5 mm |
| Package Width | 15.36 ±0.5 mm |
| Body Width | 12.20 mm |
| Package Height | 7.30 ±0.5 mm |
| Pin Count | 48 Pins |
| Pin Pitch | 1.02 mm |
| SMT Pad Spacing | 16.95 mm / 2.34 mm |
| Dimension Tolerance | ±0.25 mm Unless Otherwise Specified |
Thanks to its dual-port design and superior noise isolation, the QT48A03 Ethernet Magnetics module is the component of choice for a wide array of telecommunication and networking hardware:
* High-Performance Digital Switches and Enterprise Routers
* Power over Ethernet (PoE) Powered Devices (PD)
* Optical Transceivers and Media Converters
* Broadband Access Equipment (ISDN, ADSL, VDSL)
* Interactive Set-Top Boxes (STB) and HD Interactive Players
* Integrated Services Digital Network (ISDN) Equipment
A: A Dual Port Ethernet Transformer Module integrates magnetic transformers for two Ethernet ports into a single SMT package, providing electrical isolation, impedance matching, and EMI suppression for Ethernet interfaces.
A: Yes. The module is engineered for Surface Mount Technology (SMT) and is designed to withstand IR reflow soldering temperatures with a peak requirement of 255℃.
A: Compared with single-port transformers, a dual-port module offers:
A: Yes, the QT48A03 is highly suitable for PoE Powered Devices (PD) and related network equipment, providing the necessary signal isolation and 1500Vrms Hi-Pot protection.
A: The component requires a 48-pin layout with a pin pitch of 1.02mm. The overall dimensions are 27.70 x 15.36 x 7.30 mm. Please refer to the downloadable PDF datasheet for exact pad layout schematics.
A: The module provides 1500Vrms isolation, protecting Ethernet PHY circuits while improving system reliability.
A: Yes. QT48A03 is fully compliant with RoHS environmental regulations.
A: Yes. LINK-PP provides engineering samples, datasheets, technical support, and OEM/ODM customization services for product evaluation and mass production.
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
1997
Total Annual:
$30-$50 million
Employee Number:
300~600
Ecer Certification：
Verified Supplier
LINK-PP International Technology Co., Limited, founded in 1997, is a vertically integrated manufacturer specializing in Ethernet magnetic components and high-speed connectivity solutions up to 10G. With over 26 years of experience, our core products include RJ45 modular jacks, MagJacks, discrete m... LINK-PP International Technology Co., Limited, founded in 1997, is a vertically integrated manufacturer specializing in Ethernet magnetic components and high-speed connectivity solutions up to 10G. With over 26 years of experience, our core products include RJ45 modular jacks, MagJacks, discrete m...
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