Datasheet 3D Models

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

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Count	Unit price
1	$3.77
200	$3.00
600	$2.23
1000	$1.76
2400	$1.51
5000	$1.39

For high volume or non-stock items, request a quote.

Termination

L = Tin-silver over tin over nickel

Packaging

D = 13" machine-ready reel

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Designer's Kit:

Kit	Values	Price
C372	10 (2 of each)	$53.00

Specifications

Electrical specifications at 25°C.

Samples of parts in red are available in Coilcraft Designer's Kit C372

Part number 1 (Hover for schematics)	Power (W)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min (µH)	DCR max 3			Leakage Inductance max (µH) 4	Turns Ratio 5	Isolation Voltage (Vrms) 6	Secondary Output (V, ) 7
Part number 1 (Hover for schematics)	Power (W)	Inductance at 0A (µH) 2 (Tolerance: ±10%)	Inductance min (µH)	Pri (Ω)	Sec (mΩ)	Bias (mΩ)	Leakage Inductance max (µH) 4	Pri : Sec : Bias	Isolation Voltage (Vrms) 6	Secondary Output (V, ) 7
POE13F-18LD	13	45.0	40.5 @ 2.3 A	0.195	5.000	195.000	7.9	1 : 0.07 : 0.36	1500	1.8 V , 7.2 A
POE13F-25LD	13	35.0	31.5 @ 2.2 A	0.095	5.000	150.000	4.2	1 : 0.08 : 0.33	1500	2.5 V , 5.2 A
POE13F-33LD	13	40.0	36.0 @ 2.2 A	0.138	7.000	180.000	3.4	1 : 0.11 : 0.36	1500	3.3 V , 3.9 A
POE13F-50LD	13	40.0	36.0 @ 2.1 A	0.130	9.000	165.000	1.9	1 : 0.15 : 0.35	1500	5 V , 2.6 A
POE13F-12LD	13	35.0	31.5 @ 2 A	0.095	17.000	150.000	0.6	1 : 0.35 : 0.35	1500	12 V , 1.1 A
POE60F-18LD	6	75.0	67.5 @ 1.3 A	0.195	5.000	195.000	8.0	1 : 0.07 : 0.36	1500	1.8 V , 3.3 A
POE60F-25LD	6	55.0	49.5 @ 1.2 A	0.095	5.000	150.000	4.6	1 : 0.08 : 0.33	1500	2.5 V , 2.4 A
POE60F-33LD	6	65.0	58.5 @ 1.2 A	0.138	7.000	180.000	3.9	1 : 0.11 : 0.36	1500	3.3 V , 1.8 A
POE60F-50LD	6	60.0	54.0 @ 1.1 A	0.130	9.000	165.000	2.3	1 : 0.15 : 0.35	1500	5 V , 1.2 A
POE60F-12LD	6	55.0	49.5 @ 1.1 A	0.095	17.000	150.000	2.4	1 : 0.35 : 0.35	1500	12 V , 500 mA
POE13F-19LD	13	37.0	33.3 @ 2 A	0.085	25.000	150.000	0.4	1 : 0.57 : 0.35	1500	19.5 V , 670 mA
POE13F-24LD	13	37.0	33.3 @ 2 A	0.086	49.000	150.000	0.4	1 : 0.67 : 0.33	1500	24 V , 540 mA

Notes

When ordering, please specify packaging code: e.g. POE13F-12LD
Inductance is for the primary, measured at 250 kHz, 0.3 Vrms.
DCR for the primary and for the secondary are with the windings connected in parallel.
Leakage inductance is for the primary windings with the secondary windings shorted.
Turns ratios are with the primary the secondary windings connected in parallel.
1500 Vrms isolation primary and bias windings to secondary windings.
Output of the secondary is with the windings connected in parallel. Bias winding output is 12 V, 20 mA.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver over tin over nickel over phos bronze terminations. Other terminations available at additional cost.

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.

Environmental

Environmental:

RoHS compliant

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +125°C
Tape and reel packaging: –40°C to +80°C

Failures in Time (FIT) / Mean Time Between Failures (MTBF):

See FIT/MTBF Calculations

Schematics

Primary windings and secondary windings
to be connected in parallel on PC board.

Physical characteristics

Tape and Reel specification

Parts per reel	Reel dimensions (mm)					Tape dimensions (mm)						Orientation
13" (330 mm)	A	B	C	D	E	W	P	Po	P1	H	T
200	330	100	13	50,4	44,4	44	28	4	2	9,6	0,4

General specification

Core Material:

Ferrite

Weight:

5.0 – 5.6 g

Packaging:

200 per 13″ reel Plastic tape: 44 mm wide, 0.4 mm thick, 28 mm pocket spacing, 9.6 mm pocket depth

Soldering/Washing

Moisture Sensitivity Level (MSL):

1 (unlimited floor life at <30°C / 85% relative humidity)

Resistance to soldering heat:

Max three 40 second reflows at +260°C, parts cooled to room temperature between cycles

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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Flyback Transformers

for Power over Ethernet

Selected configuration not available

Specifications

Termination:

Packaging:

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning