Ethernet Surge Protective Device (SPD) design considerations

This document defines the common-mode, common mode to differential mode conversion and differential mode surge parameter and test circuit requirements of an Ethernet port primary protector. The preferred surge generator voltage levels are 2.5 kV, 6 kV and 12 kV, but the test circuits can be used for any surge voltage environmental. Power over Ethernet (PoE) feed requirements are also given.