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Introduction
Specifications
Environmental
Performance curves
Schematics
Physical characteristics
Tape & Reel
Soldering/Washing

3D Model Datasheet

Flyback & Forward Transformers

for Power over Ethernet

Flyback and forward transformers for PoE applications up to 72 W
Operates with 9 – 57 V input (POE21, 22, 24, 33, 35 and 38)
Operates with 33 – 57 V input (POE23, 30, 36, 53, 70 and 72)
Dual outputs can be configured as one single higher power output
AEC-Q200 Grade 1 (-40°C to +125°C)

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Count	Unit price
1	$3.26
150	$3.17
300	$2.89
600	$2.62
1200	$2.19
2400	$2.00
5000	$1.82

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

Termination

E = Tin-silver-copper over tin over nickel

Packaging

D = 13" machine-ready reel

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Specifications

Electrical specifications at 25°C.

Flyback Transformers

Part number (Hover for schematics)	Power (W)	Inductance at 0A (µH) 1	Tolerance (%)	Isat (A) 2	DCR max (mΩ)				Leakage Inductance max (µH) 3	Turns Ratio	Isolation Voltage (Vrms) 5	Secondary Output (V, A) 6
Part number (Hover for schematics)	Power (W)	Inductance at 0A (µH) 1	Tolerance (%)	Isat (A) 2	Pri	Sec1	Sec2	Aux	Leakage Inductance max (µH) 3	Pri : Sec1 : Sec2 : Aux	Isolation Voltage (Vrms) 5	Secondary Output (V, A) 6
POE21PR-33E_	21	21	10	6.2	31.0	10.0	10.0	80.0	0.30	1 : 0.231 : 0.231 : 0.692	1500	3.3 V , 3.2 A
POE22PR-50E_	22	21	10	6.2	31.0	17.0	17.0	80.0	0.16	1 : 0.333 : 0.333 : 0.75	1500	5 V , 2.2 A
POE23PR-33E_	23	54	10	3.2	62.0	6.5	6.5	58.0	0.67	1 : 0.125 : 0.125 : 0.375	1500	3.3 V , 3.5 A
POE24PR-12E_	24	21	10	6.3	31.0	52.0	52.0	72.0	0.15	1 : 0.75 : 0.75 : 0.667	1500	12 V , 1 A
POE30PR-50E_	30	48	10	3.6	62.0	10.0	10.0	85.0	0.40	1 : 0.188 : 0.188 : 0.375	1500	5 V , 3 A
POE36PR-12E_	36	41	10	4.2	62.0	23.0	23.0	85.0	0.28	1 : 0.375 : 0.375 : 0.375	1500	12 V , 1.5 A

Forward Mode Transformers

Part number (Hover for schematics)	Power (W)	Inductance at 0A (µH) 1	Tolerance (%)	DCR max (mΩ)				Leakage Inductance max (µH) 3	Turns Ratio	Volt-time product (V-µs) 4	Isolation Voltage (Vrms) 5	Secondary Output (V, A) 6
Part number (Hover for schematics)	Power (W)	Inductance at 0A (µH) 1	Tolerance (%)	Pri	Sec1	Sec2	Aux	Leakage Inductance max (µH) 3	Pri : Sec1 : Sec2 : Aux	Volt-time product (V-µs) 4	Isolation Voltage (Vrms) 5	Secondary Output (V, A) 6
POE33PR-33E_	33	128	25	17.0	12.5	12.5	145	0.10	1 : 0.625 : 0.625 : 0.75	71	1500	3.3 V , 5 A
POE35PR-50E_	35	128	15	17.6	23.0	23.0	340	0.15	1 : 0.875 : 0.875 : 1.75	71	1500	5 V , 3.5 A
POE38PR-12E_	38	128	15	17.6	122	122	340	0.15	1 : 2.125 : 2.125 : 1.75	71	1500	12 V , 1.6 A
POE53PR-33E_	53	100	15	30.0	6.5	6.5	120	0.40	1 : 0.167 : 0.167 : 0.5	107	1500	3.3 V , 8 A
POE70PR-50E_	70	100	15	30.0	10.0	10.0	120	0.40	1 : 0.25 : 0.25 : 0.5	107	1500	5 V , 7 A
POE72PR-12E_	72	100	15	38.0	27.0	27.0	120	0.25	1 : 0.583 : 0.583 : 0.5	107	1500	12 V , 3 A

Notes

Inductance is for the primary, measured at 200 kHz, 0.1 Vrms, 0 Adc.
DC current at 25°C that causes an inductance drop of < 30% from its value without current.
Leakage inductance measured between pins 1 and 3 with all other pins shorted.
Based on 280 mT at 25°C and number of turns on pins 1-3.
1500 Vrms, one minute isolation (hipot) from primary and auxillary to each secondary.
500 Vrms from pri to aux; 500 Vrms between two secondary.
Output is for each secondary. Output of the aux winding is 10 V, 50 mA.

Termination:

RoHS-compliant. 260°C compatible. Tin-silver-copper over tin over nickel
over phos bronze terminations.

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 with leader and trailer ($25 charge).

Environmental

Environmental:

RoHS compliant , halogen free

Ambient temperature range:

–40°C to +125°C

Storage temperature range:

Component: –40°C to +165°C
Tape and reel packaging: –40°C to +80°C

Maximum part temperature:

+165°C (ambient + temp rise)

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

See FIT/MTBF Calculations

Performance curves

Inductance vs Current

Schematics

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
150	330	100	13	50,4	44,4	44	28	4	2	14,6	0,5

General specification

Core Material:

Ferrite

Packaging:

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

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Flyback & Forward Transformers

for Power over Ethernet

Selected configuration not available

Specifications

Flyback Transformers

Forward Mode Transformers

Termination:

Packaging:

Performance curves

Inductance vs Current

Schematics

Physical characteristics

Tape and Reel specification

General specification

Soldering/Washing

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Warning