How convenient is RJ45 with transformer

In theory, you do not need to connect to the transformer, directly connected to the RJ45 is also able to work properly. However, the transmission distance is very limited, and when different levels of access to the network, there will be an impact. And external interference on the chip is also very large. When connected to the network transformer, it is mainly used for signal level coupling. In the network transformer to play the role of filtering, specifically, is the suppression of the mode signal, electromagnetic radiation suppression. Many network transformer manufacturers choose choke core material, generally choose 5000U. Applied in network communication, Internet of things, Ethernet, industrial power, automotive electronics and other fields. The RJ45 connector with transformer not only enhances the transmission signal and improves the transmission distance, but also increases the practicability and adaptability of the connector, which makes the network interface more convenient and comfortable, and reduces the user's burden, it is a very important electronic component to get more results with less effort. The range of normal operation without RJ45 transformer is very limited, which will have some influence when connecting to different level network ports. And the chip is subject to great external interference.