As consumers have higher and higher requirements for the quality of electronic products, especially for Netcom products against lightning and surge, Netcom brand manufacturers on the market have also made higher requirements for lightning protection of their own products (switches, modems, routers, etc.) on the basis of standards.，

Most product regulations require: power port, differential mode/common mode :±1KV/±2KV; Signal port :±1KV

Manufacturer requirements: Power port, differential mode/common mode :±4KV/±6KV; Signal port :DSL port ±6KV& Ethernet port ±2.5KV

In the process of lightning strike & surge immunity test, the selection of CDN (coupled decoupling network) is crucial to the accuracy and reliability of the test results. The following describes the relevant requirements of IEC 61000-4-5 for the selection of CDN

IEC 61000-4-5 requirements for CDN selection are shown in the following figure 

a, for AC/DC port CDN:

b, for unshielded asymmetric interconnect CDN:

c, for unshielded symmetric interconnect CDN:

BTL has two CDNS of different designs for unshielded symmetric interconnect testing in IEC 61000-4-5 (commonly used in RJ45 and RJ11 port tests), and both can implement online communication testing.

BTL South China has three sets of lightning/surge test equipment and one set of power line induction and power line contact test equipment required by K.21 regulations, which not only meets the requirements of major brands, but also can quickly digest test projects.

Thet energy of Songshan Lake site: power port ±6KV, signal port ±6KV;

Test energy of Dalang site: power port ±10KV, signal port ±6KV.。

If you want to know more about lightning strike/surge immunity testing, you are welcome to contact the BTL team at any time, BTL will share the most professional and comprehensive information with you.