Ensure minimum energy usage by avoiding AC power outlets and instead using ON Semiconductor"s NCP1081DEG power over Ethernet controller. Use this part at voltages between 0 V and 57 V. In order to ensure parts aren"t damaged by bulk packaging, this product comes in tube packaging to add a little more protection by storing the loose parts in an outer tube. This POE controller"s maximum duty cycle is 80(Typ) %. This POE controller has an operating temperature range of -40 °C to 85 °C.