Which PoE standard can supply power up to 51W or 73W?

The 802.3bt standard, also referred to as PoE++, is designed to deliver higher power levels than its predecessors, making it capable of supplying up to 51W or even 73W per port, depending on the wiring scenario used. This significant increase in power delivery is a major advantage for devices that require more energy, such as high-performance wireless access points, surveillance cameras, and other power-hungry devices.

In contrast to this standard, 802.3af (PoE) provides a maximum of 15.4W, and 802.3at (PoE+) can deliver up to 30W. The 802.3az standard, known as Energy Efficient Ethernet, focuses on energy conservation during periods of low data transmission and does not directly relate to power delivery for devices in the same capacity as the other standards. Therefore, the correct answer highlights the advanced capabilities of the PoE++ standard, making it suitable for current and future networking needs that demand higher power levels.