Dedicated transformers ease implementation of PoE designs

April 3, 2025

The Eaton portfolio of power-over-Ethernet (PoE) transformers enables power-system designers to avoid the need to develop a custom transformer or to use a transformer that is not optimized for PoE applications.

Eaton manufactures a wide range of PoE transformers for use in devices operating according to the IEEE 802.3 Ethernet protocol, and supplying loads ranging from 3 W to 156 W.

 

These PoE transformers support both flyback and fly-forward topologies, and meet the requirements of various Ethernet types:

  • IEEE Type 1 (802.3af)
  • IEEE Type 2 (802.3at)
  • IEEE Type 3 (802.3bt)
  • IEEE Type 4 (802.3bt)

The transformers are supplied in six standard sizes:

  • EP10
  • EP13
  • EFD15
  • EFD20
  • EFD25
  • EFD30

Flyback designs are often used in energy storage and battery charging applications, while the fly-forward topology mostly supports high-power applications consuming typically 50 W or more.

 

The Eaton PoE transformers are certified for compliance with the IEEE 802.3af PoE standard. 

Features

  • Low leakage inductance
  • High power density
  • Operating-temperature range: -40° C to 125°C
  • 1,500 V isolation

Applications

  • Lighting equipment
  • Remote cameras
  • Industrial automation equipment
  • Security system
  • VoIP equipment
  • Network access points
  • Chargers
  • Network routers and repeaters
EXTRA_Eaton_PoE-Transformers

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