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Flyback Transformers
for Power over Ethernet

  • Developed for Powered Devices (PD) in IEEE 802.3af compliant PoE applications
  • 6 Watt and 13 Watt output versions
  • 36 – 72 V input, 250 kHz switching frequency
  • Bias winding output: 12 V, 20 mA
  • 1500 Vrms isolation primary and bias windings to secondary windings
  • 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 C372

SPECIFICATIONS


Parts in red type are included in Coilcraft Designer's Kit C372

Part number1
Click for
samples
Power
(W)
L at 0 A
±10%2
(µH)
L at Ipk
±10%3
(µH)      
DCR (Ohms)4 Leakage
L max5
(µH)
Turns ratio6 Ipk3
(A)
Output7
pri     sec    bias   pri sec pri : bias
POE60F-18L_ 6 75.0 67.5 0.195 0.005 0.195 8.0    : 0.07  0.36 1.3 1.8 V, 3.3 A
POE60F-25L_ 6 55.0 49.5 0.095 0.005 0.150 4.6 : 0.08 : 0.33 1.2 2.5 V, 2.4 A
POE60F-33L_ 6 65.0 58.5 0.138 0.007 0.180 3.9 : 0.11 : 0.36 1.2 3.3 V, 1.8 A
POE60F-50L_ 6 60.0 54.0 0.130 0.009 0.165 2.3 : 0.15 : 0.35 1.1 5.0 V, 1.2 A
POE60F-12L_ 6 55.0 49.5 0.095 0.017 0.150 0.7 : 0.35 : 0.35 1.1 12.0 V, 0.5 A
POE13F-18L_ 13 45.0 40.5 0.195 0.005 0.195 7.9 : 0.07 : 0.36 2.3 1.8 V, 7.2 A
POE13F-25L_ 13 35.0 31.5 0.095 0.005 0.150 4.2 : 0.08 : 0.33 2.2 2.5 V, 5.2 A
POE13F-33L_ 13 40.0 36.0 0.138 0.007 0.180 3.4 : 0.11 : 0.36 2.2 3.3 V, 3.9 A
POE13F-50L_ 13 40.0 36.0 0.130 0.009 0.165 1.9 : 0.15 : 0.35 2.1 5.0 V, 2.6 A
POE13F-12L_ 13 35.0 31.5 0.095 0.017 0.150 0.6 : 0.35 : 0.35 2.1 12 V, 1.1 A
POE13F-19L_ 13 37.0 33.3 0.085 0.025 0.150 0.4 : 0.57 : 0.35 2.0 19.5.0 V, 0.67 A
POE13F-24L_ 13 37.0 33.3 0.086 0.049 0.150 0.4 : 0.67 : 0.33 2.0 24 V, 0.54 A
1 When ordering, please specify packaging code: e.g. POE13F-12LD
Packaging: D = 13" machine-ready reel
EIA 481 embossed plastic tape (200 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, 0.3 Vrms, 0 Adc
3 Ipk: Peak primary current drawn at minimum input voltage.
4 DCR for the primary and for the secondary are with the windings connected in parallel. DCR measured at 25°C. For other operating temperatures, use this DCR at Temperature calculator.
5 Leakage inductance is for the primary winding with the secondary winding shorted.
6 Turns ratios are with the primary the secondary windings connected in parallel.
7 Output of the secondary is with the windings connected in parallel. Bias winding output is 12 V, 20 mA.
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: April 11, 2017