It is increasingly important to include proper circuit protection in Power over Ethernet (PoE) designs to ensure adequate protection and inter-compatibility among equipment. Though the PoE standard includes overcurrent protection specifications, it is important to remember that these systems are also threatened by electrical transients that would be observed in any other power equipment. In addition, because electronics and telecommunication equipment have become inherently more sensitive, smaller and power hungry to meet users’ demands, it is even more important to include adequate surge protection in the design. This white paper from Bourns outlines the range of threats and provides circuit protection solutions.