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AT-4 Active Gigabit PoE+ Injector IEEE802.3at Mode A Power Over Ethernet Injector -Not Include Power Supply

AT-4 Active Gigabit PoE+ Injector IEEE802.3at Mode A Power Over Ethernet Injector -Not Include Power Supply

Regular price £29.99 GBP
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4 port Gigabit PoE+ auto negotiating injector - Power supply NOT included

This 4 port PoE+ Gigabit injector allows for 10/100/1000 data speed and is able to provide up to 25 watts of power to each individual port. It negotiates with 802.3af devices and gives the device the power it needs. No power is given until a PoE device is found and activated. 


  • Wall mount
  • Use with any PoE or non-PoE switch
  • No power given to non-PoE devices
  • 802.3af/at compatible
  • Input voltage range 44-57v DC
  • 10/100/1000 data speed
  • 650 ma current limiter per port
  • 2.1mm x 5.5mm DC plug
  • Mode A output pins: 1&2 (-) and 3&6 (+) - polarity reversible (see our XRJ-45 crossover cable or use any Ethernet crossover cable)
  • Quiet operation - no fan or cooling required
  • Operating temperature: 0°C ~ 50°C
  • Storage temperature: 0°C ~ 50°C
  • Humidity range: 5% to 90% non-condensing

Product Specifications:

  • Size: 116 x 45 x 25 mm includes 2 10mm tabs
  • Weight 24 ounces

Other Options:

  • 8 and 16 port version available 
  • 6, and 12 wall mount Gigabit injectors
  • 6 and 12 rack mount injectors

Similar Products: 

  • GAT-8
  • GAT-16
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    Frequently Questions About POE

    What is "POE"?

    PoE is " Power over Etherenet". A device like this one take DC power and injects on one or both pairs of wire in the Ethernet cable. It's used to power IP cameras, VOIP phones, Wifi Access Points and other networks devices.

    What is the difference between Mode A and Mode B?

    Mode A and Mode B are two different POE pinouts ( the wire pairs used to transmit power).

    Mode matters most if you're powering a 24-volt passive PoE devices like those from Mikrotik or Ubiquiti. These devices always need Mode B.

    If you're powering a devices that has a spec of “802.3af” (48 Volts), them eighter mode A or mode B should work.

    What does passive POE mean?

    Passive PoE means the PoE Injector is always on rather than negotiating with the powered device to turn on and off as need.

    Which power supply do I need?

    The power supply will depend on the specs of the powered devices. Most VOIP phones and IP cameras use 802.3af PoE, which requires a 48 volt power supply. For Wifi, check your device specs for either 802.3af or 24 volt passive.

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