MORE POWER!
Today we’re announcing the next generation of our Power over Ethernet (PoE) HAT. Compared to its predecessor, the Raspberry Pi PoE+ HAT delivers more power, implementing the 802.3at PoE+ standard; and it runs cooler, thanks to various design improvements. Best of all, we’ve been able to keep the original affordable price of $20.
The original PoE HAT implements the 802.3af standard, and can deliver a guaranteed minimum of 13W to the Raspberry Pi. This is enough to power a Raspberry Pi 4 at maximum load, but not quite enough to power the hungriest USB peripherals at the same time.
The PoE+ HAT implements the 802.3at standard. When used with a compatible switch or injector this means it can deliver up to 25W, as you can see from this comparison table.
| PoE HAT | PoE+ HAT | |
| Standards supported | 802.3af | 802.3af, 802.3at |
| Output voltage | 5V | 5V |
| Maximum output current | 2.5A | 5A |
| Maximum power | 15.4W | 25.5W |
| Fan | Yes | Yes |
| Current sense | No | Yes |
| Transformer design | Wire-wound | Planar |
| PCB | 4 layers, 2oz copper | 4 layers, 2oz copper |
| Price | $20 | $20 |
| Compatible with | Raspberry Pi 3B+, 4B | Raspberry Pi 3B+, 4B |
The new components:
A New Diode Rectifier -
The Raspberry Pi Foundation have replaced the existing diode rectifier with what they are calling an "Ideal diode".
A New Transformer - Bourns Planar Transformer
A very interesting almost flat transformer which uses PCB traces as windings for the Transformer its self!
All in all a wonderful and rounded upgrade with some great real world problem solving!
What would you do with the new PoE Hat?
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