What is the minimum power for Class 0 PD at PSE?

In Power over Ethernet (PoE), Class 0 Power Devices (PDs) are defined under the IEEE 802.3 standard to receive a minimum power of 15.4 W from Power Sourcing Equipment (PSE). This classification indicates the minimum level of power that must be made available to ensure that devices such as IP cameras, VoIP phones, and wireless access points can function properly.

Class 0 serves as a baseline for other classes, with higher classes allowing for greater power levels, but the 15.4 W requirement is a critical threshold for basic operational needs of standard network devices. This ensures compatibility and function across a range of devices that make use of this power standard, thereby facilitating easier deployment and operation within various networking environments.

The other listed options reflect power classes that either exceed the minimum necessary for Class 0 or correspond to different classifications altogether. Classes 1 through 4 offer higher power levels suitable for devices with increased power requirements, but for Class 0 specifically, 15.4 W is the established minimum threshold.