First of all, you may want to know which places can be used by network transformers?
Main applications: RJ45 network card, Ethernet switch, network router, network set-top box, smart TV, network camera, PC motherboard, industrial motherboard, network server and other equipment.

What is the role of network transformers in different applications? Take Ethernet and network cards as an example.
1. The main role of network transformers in Ethernet
❶ Signal transmission
❷ Impedance matching and conversion
❸ Waveform repair
❹ Signal clutter suppression
❺ Functions such as high voltage isolation
The specific applications mentioned above mainly include routers, optical modems, docking stations, switches, etc.;
2. The main role of the network transformer on the network card
❶ Transmission data (filtering function)
The differential signal sent through the PHY is filtered with a differential-mode coupled coil coupling to enhance the signal.
Then through the conversion of the electromagnetic field, it is coupled to the other end of the connecting network cable of different levels.
❷ Protection chip
Isolate different levels between different network devices connected by network cables.
The purpose is to prevent the transmission of different voltages through the network cable from damaging the equipment.
❸ Lightning protection
The specific applications mentioned above mainly include hubs, personal computers, etc.
The above is some understanding of network transformers and their functions in different applications. I would like to share them with you, hoping to help those who want to know more about network transformers.