Announcing the Raspberry Pi PoE+ HAT [raspberrypi.org]
The Raspberry Pi Foundation has just announced the Raspberry Pi PoE+ HAT compliant with 802.3at (aka PoE+) and 802.3af standards and support for up to 25.5 Watts input.
It will replace the Raspberry Pi PoE HAT [cnx-software.com] introduced in 2018 which was limited to 802.3af standard with a maximum of 15.4 Watts input and will become available around mid-June for $20 plus taxes and shipping.
HAT = Hardware Attached on Top.
Here is a competing Waveshare PoE HAT for Raspberry Pi 3B+/4B [waveshare.com].
Also at CNX Software [cnx-software.com].