Background

With the rapid development of Ethernet in recent years, there are more and more types of services carried by Ethernet, and the bandwidth and speed of Ethernet have also developed rapidly.Because of the high speed of port, Ethernet has higher requirements for circuit protection design.The Ethernet cable is located outdoors and vulnerable to lightning, so it is important to strengthen the surge protection design of their interfaces.we mainly use ceramic gas discharge tubes and transient suppression diodes in our Ethernet lightning protection and static protection solutions.This solution meets the needs of Ethernet lightning and ESD protection without affecting data transmission.

Socay Protection Circuit Diagram:

Protection Solution for Ethernet

Socay Electronics Components

Gas Discharge Tubes(GDTs)

GDT【SC1206-200ASMD】DC Spark-over Voltage：200±30%V，Nominal Impulse Discharge Current（8/20μS）：0.5kA，Maximum Capacitance＜0.5pF，Minimum Insulation Resistance >100MΩ; 

GDT【SC1812-90CSMD】DC Spark-over Voltage：90±20%V，Nominal Impulse Discharge Current（8/20μS）：2.0kA，Maximum Capacitance＜1.0pF，Minimum Insulation Resistance >1GΩ

TVS diode 

TVS【ESD03V32D-LC】Vrwm：3.0V；Vb：4.0V；Vesd：8KV/15KV；Ct（f=1MHz）：1.2pF；Package: SOD-323

Application

1. Laptop, PAD, home desktop computer, industrial computer

2.Switches/Router

3.camera equipment

4. Network printer

5. Set-top box

6. intelligent transportation system

7.Other devices with Ethernet ports

The Solution Note

1. The solution uses GDT in the front end of the transformer to do common mode (eight lines) surge protection.

2.The back end of the network transformer uses TVs with small volume and low junction capacitance to absorb differential mode energy. The TVS has fast reaction time and takes into account the function of electrostatic protection.

3. Comply with 802.11 electrical standards.

4. Meet IEC61000-4-5, GBT17626.5 and other surge test standards.

5. Meet IEC61000-4-2, GBT17626.2 and other electrostatic test standards

For more lightning surge protection solutions and electronics components, please directly enter the Socay website to consult the online customer service http://www.socay.com/.