ST’s telecom line protection solutions are compliant with worldwide telecom surge standards and support legacy applications. They offer the same surge current capability in both common and differential modes.
Their 4-point configuration ensures reliable protection, eliminating overvoltages introduced by the parasitic inductances of the wiring (LdI/dt), especially for very fast transient overvoltages.
This video is presenting ESD protections and Integrated Passives around the MCU
PEP01-5841, for Power over Ethernet supply lines
Introduction to surges – EOS and ESD – definition, standards, effects and root cause