Eaton PoE transformers in ﬂyback and

forward designs for PoE applications

Eaton’s Power-over-Ethernet high

voltage transformers (PoE) are

suitable for a wide range of ethernet

power devices using IEEE802.3

ethernet protocols.

Product description

Eaton’s Power-over-Ethernet

transformers (PoE) are suitable

for a wide range of ethernet

power devices using IEEE802.3

ethernet protocols. Eaton’s PoE

transformers support various

PoE controllers across many

power devices ranging from 3

W to 156 W. Eaton’s PoE comes

in 6 standard transformer sizes

(EP10, EP13, EFD15, EFD20,

EFD25, EFD30) and in both

flyback and forward topologies.

Flyback designs are often used as

energy storage while the forward

designs provide energy transfer

mostly for high power outputs,

typically 50 watts and above.

Applications for the PoE

transformers include lighting,

remote cameras, industrial

automation, security systems,

Voice over Internet Protocol

(VoIP), network access points,

chargers, network routers,

bluetooth, and network repeaters.

They perform reliably in high

operating temperatures ranging

from - 40° C to + 125° C and up

to 1500 V isolation voltage.

Features and benets

• Flexible/standard footprint options

• Design flexibility across sizes and

electrical performances covering

from 3 W to 156 W

• Full PoE transformer line covering

IEEE Type 1 (802.3af), Type 2

(802.3at), Type 3 (802.3bt), Type 4

(802.3bt)

• Offered in two popular topologies:

flyback and

forward designs

• 1500 Vac isolation between

primary and secondary

• High operating temperature

to - 40° C to + 125° C

• Low leakage inductance for

low-loss energy storage

Eaton Power-over-Ethernet high voltage transformers

Eaton is a registered trademark.

All other trademarks are property

of their respective owners.

Eaton

Electronics Division

1000 Eaton Boulevard

Cleveland, OH 44122

United States

Eaton.com/electronics

Printed in USA

Publication No. ELX1324 BU-ELX22191

March 2023

Product specifications

Part number

Output

Power

(W)

OCL

(μH)

±10%

SCL

(μH)

maximum

sat

(A)

DCR (mΩ)

maximum

@ +25 °C

(Pri)

DCR (mΩ)

maximum

@ +25 °C

(Sec 1)

DCR (mΩ)

maximum

@ +25 °C

(Sec 2)

DCR (mΩ)

maximum

@ +25 °C

(Aux) Size

POEA1FB 3 to 10 60 to 253 1.7 to 7.5 0.45 to 1.20 130 to 420 16 to 343 150 115 to 822 EP10

POEA2FB 10 to 18 37 to 180 0.56 to 2.5 1 to 2.7 70 to 460 9 to 100 190 94 to 600 EP13

POEB1FB 12 to 18 70 to 155 1.3 to 2.5 1 to 2 260 to 500 30 to 220 16 to 28 200 to 300 EFD15

POEB2FB 24 to 60 11.5 to 100 0.5 to 2 1 to 3 28 to 150 7 to 23 70 to 130 120 to 260 EFD20

POEB3FB 48 to 84 17.5 to 30 1 5 to 22 30 to 85 7 to 50 35 100 to 500 EFD25

POEB3FW 50 162 0.3 - 30 5 - 60 EFD25

POEB4FW 156 100 0.25 - 20 4.25 - 250 EFD30

Mechanical parameters and pad layout (Representative drawing--see data sheets for dimension details)

Recommended PCB LayoutEP drawing

EFD drawing Recommended PCB Layout