749020011A 1000Base-T Ethernet Transformer Surface Mounting
749020011A WE-LAN LAN Transformer for 1000Base-T SMT RJ45 applications, featuring 1500V isolation, 350µH inductance, improved CMRR, and –40°C to +85°C industrial temperature range. Ideal for industrial Ethernet, routers, switches, IP cameras, and IoT devices.
749020011A SMT LAN Transformer Overview:
The 749020011A WE-LAN LAN Transformer is a high-performance SMT Ethernet isolation transformer designed for 1000Base-T Gigabit Ethernet interfaces. Featuring enhanced common-mode noise suppression (Improved CMRR), industrial-grade temperature range, and excellent signal integrity, this transformer is optimized for SMT RJ45 connector modules, Ethernet PHY designs, and industrial networking equipment.
It is widely used in industrial Ethernet systems, routers, switches, automation devices, IP cameras, and IoT gateways, delivering reliable EMI suppression, signal isolation, and stable Ethernet performance.
Key Features
- Data Rate: 1000Base-T (Gigabit Ethernet)
- Mounting Type: Surface Mount Technology (SMT)
- Number of Ports: 1
- PoE Support: Non-PoE
- Improved CMRR: Yes (Excellent noise immunity)
- Operating Temperature: –40 °C to +85 °C
- Isolation Voltage: 1500 V RMS
- Inductance: 350 µH @ 100 kHz / 8 mA DC bias
- Compliance: IEEE 802.3ab compliant
Why Choose 749020011A for SMT Designs?
- Excellent signal integrity
- High EMI suppression
- Proven industrial-grade reliability
- Easy SMT integration
- Stable Gigabit Ethernet performance
It is an ideal choice for high-reliability industrial networking equipment and embedded Ethernet systems.
749020011A Drawing
1. 749020011A Dimensions
2. 749020011A Recommended Land Pattern
3. 749020011A Schematic
Electrical Characteristics of 749020011A LAN Magnetics:
| Parameter | Symbol | Test Conditions | Value | Unit |
|---|---|---|---|---|
| Inductance | L | 100 kHz / 100 mV @ 8 mA DC bias | 350 | µH (min.) |
| Insulation Test Voltage | VT | 1 min | 1500 | V RMS (min.) |
| Insertion Loss | IL | 1–100 MHz | –1 | dB (max.) |
| Return Loss | RL | 1–40 MHz @ 100 Ω | –18 | dB (min.) |
| Return Loss | RL | 50 MHz @ 100 Ω | –16 | dB (min.) |
| Return Loss | RL | 60–80 MHz @ 100 Ω | –12 | dB (min.) |
| Return Loss | RL | 80–100 MHz @ 100 Ω | –10 | dB (min.) |
| Differential to Common Mode Rejection | DCMR | 1–30 MHz | –43 | dB (min.) |
| Differential to Common Mode Rejection | DCMR | 30–60 MHz | –37 | dB (min.) |
| Differential to Common Mode Rejection | DCMR | 60–100 MHz | –33 | dB (min.) |
| Crosstalk | CT | 1–60 MHz | –40 | dB (min.) |
| Crosstalk | CT | 60–100 MHz | –35 | dB (min.) |
| Turns Ratio | n | — | 1:1 | ±3% |
749020011A Specifications
| Item | Description |
|---|---|
| Product Type | LAN Transformer / Ethernet Isolation Transformer |
| Data Rate | 1000Base-T |
| Ports | 1 |
| Mounting | SMT (Surface Mount) |
| PoE Support | No |
| Isolation Voltage | 1500 V RMS |
| Operating Temperature | –40 °C to +85 °C |
| Storage Conditions | < 40 °C, < 75% RH |
| Moisture Sensitivity Level | MSL 1 |
| Standards Compliance |
IEEE 802.3ab |
749020011A LAN Transformer Advantages
The 749020011A WE-LAN LAN Transformer offers a high-performance, SMT-friendly, industrial-grade solution for Gigabit Ethernet isolation and noise suppression. With excellent CMRR, wide temperature range, and broad PHY compatibility, it is an optimal choice for SMT RJ45 connector modules and industrial Ethernet hardware designs.
1. High Noise Immunity – Improved CMRR
With excellent Differential-to-Common-Mode Rejection (up to –43 dB), the 749020011A effectively suppresses common-mode noise, reducing EMI and enhancing signal stability in electrically noisy industrial environments.
2. Industrial-Grade Reliability
Designed for –40 °C to +85 °C operation, this LAN transformer ensures long-term stability and consistent signal performance in harsh industrial and outdoor conditions.
3. Optimized for SMT RJ45 Connector Modules
The SMT footprint allows seamless integration with SMT RJ45 MagJacks, enabling:
- Automated assembly (high-volume SMT production)
- Reduced PCB footprint
- Improved production efficiency
- Consistent electrical performance
4. Broad PHY Compatibility
Compatible with most mainstream Ethernet PHY ICs, including:
- Microchip
- TI
- Broadcom
- Analog Devices / Linear Technology
This makes it ideal for PHY reference designs, embedded Ethernet modules, and industrial controllers.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.