PoE+ to USB-C splitter

PoE+ to USB-C splitter for UniFi Cloud Gateway Ultra

Intro

I have a UniFi Cloud Gateway Ultra that supports speed 10/100/1000 with the following 🔌 Power Specifications:

Power MethodMax. Power ConsumptionSupported Voltage Range
USB type C (5V DC/3A)6.2W100-240V AC

It comes with a 🔌 Power Supply:

  • USB type C (5V DC/3A) (Adapter included)

So currently the setup looks like this:

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I want to avoid using 2 cables:

  • 1 cable for power
  • 1 cable for data transfer.

Instead I want to power this over PoE+ from my UniFi Lite 8 PoE device with one cable.

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This means I need a PoE+ to USB-C splitter that:

  • Voltage (V): Must be exactly 5V - this is non-negotiable.
  • Current (A): Should be 3A or higher.
  • Uses USB-C as the output port
  • Is 802.3at (PoE+) compliant (to provide sufficient power)

Investigation

But all of the above is not really necessary because the Max. Power Consumption of the UniFi Cloud Gateway Ultra is only 6.2W there is no need for 5V 3A that is 15W:

Power (W) = Voltage (V) × Current (A)
          = 5V × 3A
          = 15W

5V 2.4 supports 12W which is more than enough for the Max. Power Consumption: 6.2W of the UniFi Cloud Gateway Ultra.

Power (W) = Voltage (V) × Current (A)
          = 5V × 2.4A
          = 12W

If we look at the table below we also dont need 802.3at - PoE+ (Type 2). 802.3af - PoE (Type 1) is more than the Max. Power Consumption: 6.2W of the UniFi Cloud Gateway Ultra.

StandardMax Power from PSEMax Power at PDVoltage RangeCommon Name
802.3af15.4 W12.95 W44-57 VPoE (Type 1)
802.3at30.0 W25.5 W50-57 VPoE+ (Type 2)

So in the end I went for a budget PoE+ to USB-C splitter:

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But if you want to be on the safe side it is better to go with 5V 3A version that supports 802.3at (PoE+ (Type 2)) and speed of 10/100/1000 or higher.