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Document 522-1
For 30 Watt
PoE Applications
Flyback Transformers
• Designed to meet 30 W PoE IEEE 802.3at-2009 standard.
• Operates at 250 kHz with 36–72 Volts input.
• Isolation: 1500 Vrms, one minute pri to sec; 500 Vrms pri to aux
• UL Certified per File E219588
Designer’s Kit C398 contains three samples of each part.
Core material Ferrite
Terminations RoHS tin-silver over tin over nickel over phos bronze.
Other terminations available at additional cost.
Weight 11.9 g
Ambient temperature –40°C to +125°C
Storage temperature Component: –40°C to +125°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)
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
Inductance Inductance
Leakage
at0A2
at Ipk3
inductance5
Ipk3
(A)
DCR max (Ohms)
Turns ratio6
Part
number1
±±0ꢀ(µH)
min (µH)
pri4
sec4
aux
max (µH) pri:sec pri:aux
Output7
POE300F-33L_
POE300F-50L_
POE300F-12L_
POE300F-19L_
POE300F-24L_
42.0
42.0
42.0
42.0
42.0
37.8
37.8
37.8
37.8
37.8
0.070 0.0023 0.220
0.069 0.0050 0.225
3.00
1.60
0.545
0.430
0.310
1:0.09
1:0.14
1:0.33
1:0.56
1:0.67
1:0.33
1:0.33
1:0.33
1:0.33
1:0.33
2.6
2.6
2.6
3.3V, 9A
5V, 6A
12V, 2.5A
0.061 0.015
0.060 0.037
0.060 0.055
0.195
0.195
0.195
2.6 19.5V, 1.5A
2.6 24V, 1.25A
1. When ordering, please specify packaging code:
POE300F-50LD
12
11
10
1
2
Packaging: D = 13″ machine-ready reel. EIA-481 embossed plastic
tape (175 parts per full reel). Quantities less than full
reel available: in tape (not machine ready) or with
leader and trailer ($25 charge).
Pri
Sec
9
8
7
4
3
5
B = Less than full reel. In an effort to simplify our part
numbering system, Coilcraft is eliminating the need
for multiple packaging codes. When ordering, simply
change the last letter of your part number from B to D.
Aux
2. Inductance is for the primary, measured at 250 kHz, 0.7 Vrms, 0 Adc.
3. Peak primary current drawn at minimum input voltage.
4. DCR is with the windings connected in parallel.
5. Leakage inductance is for the primary winding with the secondary wind-
ings shorted.
6
The primary windings and the secondary
windings to be connected in parallel on
the PC board.
6. Turns ratio is with the primary and the secondary windings connected in
parallel.
7. Output is with the secondary windings connected in parallel. Output of
the auxiliary winding is 12 V
8. Electrical specifications at 25°C.
Refer to Doc 362 “Soldering Surface Mount Components” before soldering.
Document 522-1 Revised 07/05/23
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. 2023
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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