1.What is POE

POE is the abbreviation of Power over Ethernet . It is a technology that allows data to be transmitted over Ethernet cables while simultaneously providing power to connected devices. Traditionally, equipment requires additional power lines to supply power, but using POE technology can simplify the installation and management of equipment and reduce the number and complexity of cables. POE technology is widely used in network cameras, wireless access points, IP phones and other equipment.

2. Problems encountered by POE port

1) In a network environment, you may encounter electrical interference caused by factors such as lightning strikes, power mutations, and power failures. These interferences can cause problems such as voltage fluctuations and surge currents.

2) Without proper surge protection, electrical surges can produce momentary overvoltages on a device's electronic components and circuits, causing the device to be damaged or even fail to function properly .

3) The POE port is one of the key interfaces for connecting network devices, such as web cameras, wireless access points, etc. Without proper surge protection, electrical interference in the network can cause port failures, affecting the stability and reliability of the entire network.

3. How to solve the POE port surge interference problem

Taking appropriate surge protection measures for POE ports is very necessary to ensure the normal operation of equipment, reduce maintenance and replacement costs, and improve network performance. Placing surge protection devices on POE ports can effectively reduce the impact of these interferences on equipment. Due to the use environment, the lightning protection requirements for POE ports are sometimes as high as 4KV, or even higher than 6kV ( 10/700us) .

Shanghai Leimao launches 4KV and 6KV lightning protection solutions according to market demand

4. POE port outdoor 4KV lightning protection solution

Advantages of the solution: Used for outdoor surge protection of POE network ports. This solution uses secondary protection and works reliably.

Ensure signal high temperature integrity, meet IEC61000-4-2 , level 4 , contact discharge 30kV , air discharge 30kV .

IEC61000-4-5 10/700μs , 40Ω , 4kV , ±5 times, LMBJ58CP4 is specially designed for POE 48V power supply. This solution can transmit at high temperatures without packet loss.

2. POE port outdoor 6KV lightning protection solution

Advantages of the solution: Used for outdoor surge protection of POE network ports. This solution uses secondary protection and works reliably.

Ensure signal high temperature integrity, meet IEC61000-4-2 , level 4 , contact discharge 30kV , air discharge 30kV .

IEC61000-4-5 10/700μs , 40Ω , 6kV , ±5 times, this solution can transmit at high temperatures without packet loss

Shanghai Leiditech Electronics specializes in providing customers with electromagnetic compatibility EMC design services and provides free laboratory testing.