PoE Class
PoE class is specified in IEEE802.3af. There are five classes which stipulate maximum current consumption of the PoE product.
Class: 0
Power available at powered product: 0.44 to 12.96 W
Class: 1
Power available at powered product: 0.44 to 3.84 W
Class: 2
Power available at powered product: 3.84 to 6.49 W
Class: 3
Power available at powered product: 6.49 to 12.95 W
Class: 4
Power available at powered product: reserved