WE-LAN LAN Transformer

Characteristics

  • Suitable for industrial temperatures from –40 °C up to +125 °C
  • Different version available from 1.5 kV isolation to 6 kV.
  • HPLE version
  • Additional CMC for higher attenuation
  • Non PoE, PoE and PoE++ up to 2 A
  • PoE up to 150 W and speeds up to 1 Gbit/s
  • Available in SMT
  • Compliant with standards: IEEE 802.3u, IEEE 802.3ab, IEEE 802.3af, IEEE 802.3at and IEEE 802.3bt
  • UL Recognized
  • Reference Designs
  • RD016 Reference Design Gigabit Ethernet Front End
  • RD022 GB PoE+-Ethernet-USB“ adapter for industrial use with an EMC perspective
  • RD041 Design of a Single Pair Ethernet System with Power over Data Lines (SPoE)

Applications

  • Compatible to Industrial Ethernet systems like EtherCAT or Profinet
  • Compliant with most IC’s for Ethernet applications such as Microchip, Texas Instruments, Broadcom, Linear Technology
  • Router, switches, sensors, robotics, automation, IP cameras, IoT applications

Products

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Data­sheet
Simu­lation
Downloads
Status
Data rate
Ports
PoE
Improved CMRR
Operating Temperature
VT (V (RMS))
Mount
L (µH)
Design Kit
Samples
WE-LAN LAN Transformer
749080010
2.5/5G Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 2.5/5G Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 200 µH
Design Kit
WE-LAN LAN Transformer
749082010
2.5/5G Base-T, 1, 4PPoE (up to 1500 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 2.5/5G Base-T 
Ports
PoE 4PPoE (up to 1500 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 120 µH
Design Kit
WE-LAN LAN Transformer
7490100110A
10/100BASE-TX, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490100111A
10/100BASE-TX, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749013011A
10/100BASE-TX, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490100161A
10/100BASE-TX, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +125 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490120110
10/100BASE-TX, 1, PoE+ (up to 720 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE PoE+ (up to 720 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 120 µH
Design Kit
WE-LAN LAN Transformer
7490220120
10/100/1000BASE-T, 1, 4PPoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE 4PPoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490220121
10/100/1000BASE-T, 1, 4PPoE (up to 600 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE 4PPoE (up to 600 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490220122
10/100/1000BASE-T, 1, 4PPoE (up to 1000 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE 4PPoE (up to 1000 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020100A
10/100/1000BASE-T, 0.5, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports 0.5 
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490220115
10/100/1000BASE-T, 1, 4PPoE (up to 800 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE 4PPoE (up to 800 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749010012A
10/100BASE-TX, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140122B
10/100BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140123B
10/100BASE-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749024015C
10/100/1000BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140117C
10/100BASE-TX, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-TX 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 2500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140142
10/100BASE-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140125
10/100BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140124
10/100BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140141
10/100BASE-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140123
10/100BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490140140
10/100BASE-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100BASE-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749023113C
10/100/1000BASE-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020112B
10/100/1000BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 10/100/1000BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020010A
1000 Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020011A
1000 Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection Yes 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020111A
1000 Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749023010A
1000 Base-T, 1, PoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE PoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature 0 °C up to +70 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490220123
1000 Base-T, 1, 4PPoE (up to 1500 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE 4PPoE (up to 1500 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 180 µH
Design Kit
WE-LAN LAN Transformer
749020022A
1000 Base-T, 2, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490240120
1000 Base-T, 1, 4PPoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE 4PPoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
749020023A
1000BASE-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000BASE-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +105 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490240121
1000 Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 1500 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490240141
1000 Base-T, 1, 4PPoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE 4PPoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490240140
1000 Base-T, 1, 4PPoE (up to 350 mA)
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE 4PPoE (up to 350 mA) 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit
WE-LAN LAN Transformer
7490240142
1000 Base-T, 1, non-PoE
Simu­lation
Status Active i | Production is active. Expected lifetime: >10 years.
Data rate 1000 Base-T 
Ports
PoE non-PoE 
Improved Common Mode Rejection No 
Operating Temperature -40 °C up to +85 °C
Insulation Test Voltage 4000 V (RMS)
Mount SMT 
Inductance 350 µH
Design Kit

Reference Designs

GB-Ethernet Front End

Reference Designs

GB-Ethernet Front End

  • Based on Microchip's EVB-LAN7800LC evaluation board.
  • Circuit built on a 4-layer PCB.
  • Powered via the USB interface.
  • Firmware enables real-time measurements of data rate and bit error rate.
  • The electronics board offers two interfaces:
    • USB Type C™ (USB 3.1)
    • 1 Gigabit RJ45/Ethernet interface
Elektronikboard mit zwei Schnittstellen, eine USB‑Type‑C™ (USB 3.1) - und eine 1-Gigabit-RJ45/Ethernet‑Schnittstelle.

GB PoE+ Ethernet-USB Adapter

GB PoE+ Ethernet-USB Adapter

  • Based on the reference design of a 1 Gbit/s Ethernet USB adapter.
  • Original design lacked PoE functionality.
  • Incorporates Power over Ethernet Plus (PoE+) capability.
  • GB PoE+ Ethernet USB Adapter offers three interfaces:
    • USB Type-C (USB 3.1)
    • RJ45 1 Gbit/s Ethernet interface with integrated PoE function
    • Connector for a DC/DC converter with an adjustable output voltage of 6 to 18 V and a maximum output power of 25 W.
ethernet-usb-adapter, for industrial use under EMC aspects

Basics of GB-Ethernet interface

Basics of GB-Ethernet interface

  • Magnetics module (E.g., WE-LAN): This consists of a transformer and common mode choke (CMC). It reduces common-mode currents, which are unwanted electrical currents that flow in the same direction on both conductors of a twisted-pair cable. Common-mode currents can interfere with the differential signal carrying the data.
  • Bob Smith termination: This termination circuit, which includes a capacitor and four resistors, is connected between the differential signal pairs and ground. It reduces susceptibility to interference from unused wires on the RJ45 connector by providing a path for common-mode currents to flow to ground.
Graphical representation of GB-Ethernet interface (circuit), one of four channels is shown

Design structure of GB-Ethernet interface

Design structure of GB-Ethernet interface

The GB-Ethernet USB adapter was developed based on the EVBLAN7800LC Evaluation Board from Microchip. The board is available in two different variants: discrete and integrated. The integrated design combines the functionality of the discrete components into fewer, more streamlined modules. This integration results in a potentially more reliable design, reducing PCB space and simplifying assembly.

Graphical representation (circuit) of the structure of the GB-Ethernet interface

Discrete Solution Components

WE-LAN LAN Transformer

WE-LAN

A separate local area network transformer module.

WR-MJ Modular Jack Tab Up

WR-MJ

A discrete RJ45 Ethernet connector.

WE-TVS TVS diode, short response time Very low clamping voltage High ESD dielectric strength Uni- and bidirectional protection

WE-TVS

Transient voltage suppressor.

Integrated Solution Components

RJ45 Connector with integrated transformer

WE-RJ45LAN

Integrates the RJ45 connector and the  transformer (which includes the functions of WE-LAN and the WR-MJ).

Capacitors for additional filtering and stabilization.

WCAP-CSMH

Capacitors for additional filtering and stabilization.

Flyback transformer designed for PoE PDs

WE-PoE, WE-PoEH, WE-PoE+

Integrate the functionalities of the discrete components like transformers, common mode chokes, and possibly other filtering/protective elements.

Common Mode Line Filter

WE-SL5

Common mode chokes.

Discrete LAN

WE-LAN LAN Transformer, Power over Ethernet up to 150 Watts and speeds up to 1 Gbit/s

WE-LAN LAN Transformer

10/100/1000Base-T

WE-LAN 10G Transmitter 10Gbit Base-T

WE-LAN 10G Transformer

10Gbit Base-T

WE-LAN AQ Transformer, Ethernet with speeds of up to 1 Gbit/s Low overall height of 4 mm Improved return loss and crosstalk properties

WE-LAN AQ Transformer

10/100/1000Base-T

WE-STST Super Tiny Signal Transformer

WE-STST Super Tiny Signal Transformer

10/100/1G/10G Base-T

WE-BMS Transformer for battery management systems

WE-BMS Transformer

for Battery Management Systems

WE-PLC transformer

WE-PLC Transformer

Integrated LAN

WE-RJ45 plug with integrated transformer / current-compensated choke

WE-RJ45LAN

WE-RJ45 plug with integrated transformer and current-compensated choke, 10G Base-T

WE-RJ4510G

WE-RJ45 LAN Through Hole Reflow

WE-RJ45LAN (THR)

Through Hole Reflow

WE-LANMX plug connector, WE-LANMX screw connector

WE-LANMX

IP67 10/100Base-T

Frequently asked questions

10 / 100 Mbit/s uses 2 pairs

  • PSE (Power Source Equipment): This is the device that supplies power over the Ethernet cable. In a PoE system, a switch or injector acts as the PSE.
  • PD (Powered Device): This is the device that receives power and data over the Ethernet cable. Examples of PoE-powered devices include IP cameras, VoIP phones and wireless access points.

Table PoE interface classification according to IEEE 802.3

Assortments

Articles from this product series can be found in the following assortments: