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30 W Flyback Transformers
for PoE Plus Applications

  • Developed for flyback applications up to 30 Watts.
  • Designed  to meet IEEE 802.3at-2009 standard.
  • Operates with 36 – 72 V input at a 250 kHz switching frequency.
  • Isolation: 1500 Vrms primary to secondary; 500 Vrms primary to auxiliary
  • RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations
  • Samples of all values are available in Coilcraft Designer's Kit C398

SPECIFICATIONS


Part number1
Click for
samples
L at 0 A
±10%2
(µH)
L at Ipk
min3
(µH)
DCR (Ohms) Leakage
L max5
(µH)
Turns ratio6 Ipk3
(A)
Output7
pri4    sec4    aux    pri : sec pri : aux
POE300F-33L_ 42.0 37.8 0.070 0.0023 0.220 3.00 : 0.09 : 0.33 2.6 3.3 V, 9 A
POE300F-50L_ 42.0 37.8 0.069 0.0050 0.225 1.60 : 0.14 : 0.33 2.6 5 V, 6 A
POE300F-12L_ 42.0 37.8 0.061 0.015 0.195 0.545 : 0.33 : 0.33 2.6 12 V, 2.5 A
POE300F-19L_ 42.0 37.8 0.060 0.037 0.195 0.430 : 0.56 : 0.33 2.6 19.5 V, 1.5 A
POE300F-24L_ 42.0 37.8 0.060 0.055 0.195 0.310 : 0.67 : 0.33 2.6 24 V, 1.25 A
1 When ordering, please specify packaging code: e.g. POE300F-24LD
Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (175 parts per full reel)
B = Less than full reel
In tape, but not machine-ready. To have a leader and trailer added ($25 charge), use code letter D instead.
2 Inductance is for the primary, measured at 250 kHz, 0.7 Vrms, 0 Adc
3 Ipk is the peak primary current drawn at minimum input voltage.
4 DCR is with the windings connected in parallel, measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is for the primary with the secondary windings shorted.
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 Ambient temperature range: –40°C to +125°C
9 Storage temperature range: Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C
10 Resistance to soldering heat: Three reflows at >217°C for 90 seconds (+260°C ±5°C for 20 – 40 seconds), allowing parts to cool to room temperature between.
11 Electrical specifications at 25°C.
Refer to Soldering Coilcraft Components before soldering.
PCB washing: Tested to MIL-STD-202 Method 215 plus an additional aqueous wash. More info.

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Updated: November 28, 2016