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Document 1468-1

High Power PoE Flyback Transformers
HalogenFree• Developed for Flyback DC/DC PoE PD power converters
up to 51 W
• Designed to meet the upcoming IEEE802.3bt standard andoperates with 36 – 57 V input• 1500 Vrms, one minute isolation (hipot) between primary andauxiliary to secondary.
• Perfect solution for high power PoE applications including
Smart Building and IoT• AEC-Q200 Grade 1 (–40°C to +125°C)

AEC

Q200 +125°C

Core material Ferrite
Environment RoHS compliant, halogen freeTerminations Tin-silver-copper over tin over nickel over phos bronze
Weight 6.5 – 8 gAmbient temperature –40°C to +125°C
Maximum part temperature +165°C (Ambient + temp rise)
Storage temperature Component: –40°C to +165°C
Tape and reel packaging: –40°C to +80°C
Resistance to soldering heat Max three 40 second reflows at+260°C, parts cooled to room temperature between cycles
Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /85% relative humidity)			InductancePartPower	 at 0 A2
number1(W)(µH)

DCR max (mOhms)
pri    sec    aux

POE40Q-33ED
POE40Q-50ED
POE40Q-12ED
POE40Q-24ED
POE40Q-48ED
POE51Q-33ED
POE51Q-50ED
POE51Q-12ED
POE51Q-24ED
POE51Q-48ED

6466
3535346466
3535
344040
4040
40
51
51
51
51
51

33.3 @ ±15%33.3 @ ±15%27.8 @ ±15%27.8 @ ±15%27.8 @ ±15%26.7 @ ±10%26.7@ ±10%22.2@ ±10%22.2@ ±10%22.2@ ±10%

2
418
69
266
241869
266

104
102
85
85
85
104
10285
85
85

Leakageinductance3max (µH)

Turns ratio
pri : sec : aux

Isat4(A)

Output50.32
0.25
0.14
0.14
0.13
0.32
0.25
0.14
0.110.10

1 : 0.143 : 0.5
1 : 0.214 : 0.5
1 : 0.5 : 0.5
1 : 1 : 0.5
1 : 2 : 0.5
1 : 0.143 : 0.5
1 : 0.214 : 0.5
1 : 0.5 : 0.5
1 : 1 : 0.5
1 : 2 : 0.5

3.5
3.5
3.7
3.7
3.7
4.5
4.5
4.7
4.7
4.7

3.3 V, 11 A
5 V, 7.3 A
12 V, 3 A
24 V, 1.5 A
48 V, 0.76 A
3.3 V, 14.1 A
5 V, 9.3 A
12 V, 3.9 A
24 V, 1.9 A
48 V, 0.97 ADocument 1468-1

Revised 05/31/22

1. Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (150 parts per full reel). Quantities less than full
reel available: in tape (not machine ready) or withleader and trailer ($25 charge).
2. Inductance is for the primary, measured at 250 kHz, 0.5 Vrms, 0 Adc.
3. Leakage inductance is for the primary with the secondary and aux
windings shorted.
4. DC current at 25°C that causes an inductance drop of <15%(POExx51Q) and <15% (POExx40Q) from its value without current.
5. Output is for the secondary. Output of the aux winding is 12 V, 30 mA.
6. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 1468-2

Flyback Transformers for PoE
L vs Current
HalogenFreeAEC

Q200 +125°C

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1468-2

Revised 05/31/22© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.

Document 1468-3

Flyback Transformers for PoE
Schematics
POExxQ-12E, POExxQ-24E,POExxQ-33E, POExxQ-50E

Halogen
FreeAEC

Q200 +125°C

1109PriSec

367

4Aux
5Connect pin 9 to 10 andpin 6 to 7 on PC board.

POExxQ-48E
110PriSec

347Aux5Packaging 150 per 13″ reel Plastic tape: 44 mm wide,
0.5 mm thick, 28 mm pocket spacing, 14.6 mm pocket depth

US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg

Document 1468-3

Revised 05/31/22© Coilcraft Inc. 2022
This product may not be used in medical or highrisk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.