This PoE+ HAT for Raspberry Pi 5 allows you to power your board with a single Ethernet cable injected with PoE (Power over Ethernet), is galvanically isolated, and is small enough to fit inside the official Raspberry Pi 5 case.
The HAT simply fits on to the 40-pin GPIO and 4-pin PoE headers on your Pi 5, with optional included riser headers for GPIO access (allowing use with the Raspberry Pi Active Cooler), and can supply the full 5V 5A the board needs for full performance (assuming it's fed with full 802.3at PoE+).
It's galvanically isolated, providing reduced ground-loop issues, improved fault separation, and reduced common-mode interference. In short - if you're using your Raspberry Pi 5 with other hardware (attached to USB or GPIO) in a commercial, industrial or just a more complex installation, this isolated version may be a better option for you to cover electrical protection, grounding and interference.
