WE-FLEX Flexible Transformer for DC/DC Converter | Passive Components | Würth Elektronik Product Catalog

WE-FLEX Flexible Transformer for DC/DC Converter

Size	Dimensions	3D	L (mm)	W (mm)	H (mm)
ER11/5			12.9	13	6.2
ER14.5/6			16.3	16.8	7.4
EFD15			17.5	22.1	8.3
EFD20			21	29.5	10.8

LTSpice files

LT

LTSpice_WE-FLEX (rev23a).zip

|

337.3 KB

Characteristics

Transformer with 6 identical windings
4 sizes with 5 different lengths of air gap each
Isolation voltage 500 VDC
Low leakage inductance
Operating temperature: –40 ºC to +125 ºC
By using different circuits more than 375 transformer solutions and about 125 choke solutions possible. Consequently, quick prototyping possibilities

Applications

All kind of switching regulators
- Flyback converters
- Forward converters
- Push-pull converters
- Step-up/step-down converters
- SEPIC converter

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Products

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ER11/5

ER14.5/6

EFD15

EFD20

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	Order Code	Datasheet	Downloads	Status	L_BASE (µH)	I_{R BASE} (A)	I_{SAT BASE} (A)	n	V_T (V (AC))	∫Udt _Base (µVs)	R_{DC BASE} (mΩ)	Size	Type	Samples
	749196540	3.4 µH, 1.91 A, 4.18 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196540 (rev1).igs \| 2.1 MB STP 749196540 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 3.4 µH	Rated Current Base 1.91 A	Saturation Current Base 4.18 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 65.6 µVs	DC Resistance Base 30 mΩ	Size EFD20	Type gapped
	749196530	4.3 µH, 1.91 A, 2.91 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196530 (rev1).igs \| 2.1 MB STP 749196530 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 4.3 µH	Rated Current Base 1.91 A	Saturation Current Base 2.91 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 65.6 µVs	DC Resistance Base 30 mΩ	Size EFD20	Type gapped
	749196520	5.3 µH, 1.91 A, 2.53 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196520 (rev1).igs \| 2.1 MB STP 749196520 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 5.3 µH	Rated Current Base 1.91 A	Saturation Current Base 2.53 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 65.6 µVs	DC Resistance Base 30 mΩ	Size EFD20	Type gapped
	749196241	6.6 µH, 0.95 A, 1.55 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196241 (rev1).igs \| 2.8 MB STP 749196241 (rev1).stp \| 803.2 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 6.6 µH	Rated Current Base 0.95 A	Saturation Current Base 1.55 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 48.3 µVs	DC Resistance Base 159 mΩ	Size ER14.5/6	Type gapped
	749196541	7.6 µH, 1.7 A, 2.46 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196541 (rev1).igs \| 2.1 MB STP 749196541 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 7.6 µH	Rated Current Base 1.7 A	Saturation Current Base 2.46 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 98.4 µVs	DC Resistance Base 71.1 mΩ	Size EFD20	Type gapped
	749196341	7.9 µH, 0.97 A, 1.33 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196341 (rev1).igs \| 2 MB STP 749196341 (rev1).stp \| 584.9 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 7.9 µH	Rated Current Base 0.97 A	Saturation Current Base 1.33 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 39.8 µVs	DC Resistance Base 140 mΩ	Size EFD15	Type gapped
	749196231	8.3 µH, 0.95 A, 1.2 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196231 (rev1).igs \| 2.8 MB STP 749196231 (rev1).stp \| 803.2 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 8.3 µH	Rated Current Base 0.95 A	Saturation Current Base 1.2 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 48.3 µVs	DC Resistance Base 159 mΩ	Size ER14.5/6	Type gapped
	749196141	8.5 µH, 0.55 A, 0.96 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196141 (rev1).igs \| 1.2 MB STP 749196141 (rev1).stp \| 341.3 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 8.5 µH	Rated Current Base 0.55 A	Saturation Current Base 0.96 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 32.9 µVs	DC Resistance Base 344 mΩ	Size ER11/5	Type gapped
	749196331	9.3 µH, 0.97 A, 1.09 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196331 (rev1).igs \| 2 MB STP 749196331 (rev1).stp \| 584.9 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 9.3 µH	Rated Current Base 0.97 A	Saturation Current Base 1.09 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 39.8 µVs	DC Resistance Base 140 mΩ	Size EFD15	Type gapped
	749196531	9.7 µH, 1.7 A, 2.2 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196531 (rev1).igs \| 2.1 MB STP 749196531 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 9.7 µH	Rated Current Base 1.7 A	Saturation Current Base 2.2 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 98.4 µVs	DC Resistance Base 71.1 mΩ	Size EFD20	Type gapped
	749196510	9.9 µH, 1.91 A, 1.17 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196510 (rev1).igs \| 2.1 MB STP 749196510 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 9.9 µH	Rated Current Base 1.91 A	Saturation Current Base 1.17 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 65.6 µVs	DC Resistance Base 30 mΩ	Size EFD20	Type gapped
	749196131	10.9 µH, 0.55 A, 0.73 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196131 (rev1).igs \| 1.2 MB STP 749196131 (rev1).stp \| 341.3 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 10.9 µH	Rated Current Base 0.55 A	Saturation Current Base 0.73 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 32.9 µVs	DC Resistance Base 344 mΩ	Size ER11/5	Type gapped
	749196221	11.6 µH, 0.95 A, 0.84 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196221 (rev1).igs \| 2.8 MB STP 749196221 (rev1).stp \| 803.2 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 11.6 µH	Rated Current Base 0.95 A	Saturation Current Base 0.84 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 48.3 µVs	DC Resistance Base 159 mΩ	Size ER14.5/6	Type gapped
	749196521	12 µH, 1.7 A, 1.73 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196521 (rev1).igs \| 2.1 MB STP 749196521 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 12 µH	Rated Current Base 1.7 A	Saturation Current Base 1.73 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 98.4 µVs	DC Resistance Base 71.1 mΩ	Size EFD20	Type gapped
	749196321	14.2 µH, 0.97 A, 0.63 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196321 (rev1).igs \| 2 MB STP 749196321 (rev1).stp \| 584.9 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 14.2 µH	Rated Current Base 0.97 A	Saturation Current Base 0.63 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 39.8 µVs	DC Resistance Base 140 mΩ	Size EFD15	Type gapped
	749196121	14.7 µH, 0.55 A, 0.54 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196121 (rev1).igs \| 1.2 MB STP 749196121 (rev1).stp \| 341.3 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 14.7 µH	Rated Current Base 0.55 A	Saturation Current Base 0.54 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 32.9 µVs	DC Resistance Base 344 mΩ	Size ER11/5	Type gapped
	749196211	21.6 µH, 0.95 A, 0.36 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196211 (rev1).igs \| 2.8 MB STP 749196211 (rev1).stp \| 803.2 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 21.6 µH	Rated Current Base 0.95 A	Saturation Current Base 0.36 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 48.3 µVs	DC Resistance Base 159 mΩ	Size ER14.5/6	Type gapped
	749196511	22.3 µH, 1.7 A, 0.49 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196511 (rev1).igs \| 2.1 MB STP 749196511 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 22.3 µH	Rated Current Base 1.7 A	Saturation Current Base 0.49 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 98.4 µVs	DC Resistance Base 71.1 mΩ	Size EFD20	Type gapped
	749196311	23.3 µH, 0.97 A, 0.33 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196311 (rev1).igs \| 2 MB STP 749196311 (rev1).stp \| 584.9 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 23.3 µH	Rated Current Base 0.97 A	Saturation Current Base 0.33 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 39.8 µVs	DC Resistance Base 140 mΩ	Size EFD15	Type gapped
	749196111	27.4 µH, 0.55 A, 0.22 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196111 (rev1).igs \| 1.2 MB STP 749196111 (rev1).stp \| 341.3 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 27.4 µH	Rated Current Base 0.55 A	Saturation Current Base 0.22 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 32.9 µVs	DC Resistance Base 344 mΩ	Size ER11/5	Type gapped
	749196500	87.1 µH, 1.91 A, 0.03 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196500 (rev1).igs \| 2.1 MB STP 749196500 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 87.1 µH	Rated Current Base 1.91 A	Saturation Current Base 0.03 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 65.6 µVs	DC Resistance Base 30 mΩ	Size EFD20	Type ungapped
	749196201	140 µH, 0.95 A, 0.02 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196201 (rev1).igs \| 2.8 MB STP 749196201 (rev1).stp \| 803.2 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 140 µH	Rated Current Base 0.95 A	Saturation Current Base 0.02 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 48.3 µVs	DC Resistance Base 159 mΩ	Size ER14.5/6	Type ungapped
	749196301	153.8 µH, 0.97 A, 0.02 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196301 (rev1).igs \| 2 MB STP 749196301 (rev1).stp \| 584.9 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 153.8 µH	Rated Current Base 0.97 A	Saturation Current Base 0.02 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 39.8 µVs	DC Resistance Base 140 mΩ	Size EFD15	Type ungapped
	749196501	196 µH, 1.7 A, 0.02 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196501 (rev1).igs \| 2.1 MB STP 749196501 (rev1).stp \| 686.5 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 196 µH	Rated Current Base 1.7 A	Saturation Current Base 0.02 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 98.4 µVs	DC Resistance Base 71.1 mΩ	Size EFD20	Type ungapped
	749196101	198.6 µH, 0.55 A, 0.01 A	Downloads 8 files EDA models: Components ZIP ALT WE-FLEX (rev24a).IntLib \| 421 KB CDS Cadence_WE-FLEX (rev24a).zip \| 3.5 MB EAG Eagle_WE-FLEX (rev24a).lbr \| 77.5 KB KIC KiCad_WE-FLEX (rev25b).zip \| 758.5 KB ZUK Download_Cadstar_WE-FLEX (rev19a).zip \| 11.4 KB CAD files ZIP IGS 749196101 (rev1).igs \| 1.2 MB STP 749196101 (rev1).stp \| 341.3 KB Electric models ZIP LT LTSpice_WE-FLEX (rev23a).zip \| 337.3 KB Download all 8 files as zip archive ZIP	Status Active i \| Production is active. Expected lifetime: >10 years.	Inductance Base 198.6 µH	Rated Current Base 0.55 A	Saturation Current Base 0.01 A	Turns Ratio 1:1:1:1:1:1	Insulation Test Voltage 500 V (AC)	Voltage-µSecond Base 32.9 µVs	DC Resistance Base 344 mΩ	Size ER11/5	Type ungapped

Comments

The WE-FLEX series of transformers consist of 6 independent windings which can be connected on the board as required. The 25 transformers facilitate more than 500 transformer and choke variants. The transformers still show an outstandingly low level of leakage inductance. Parts without airgap are especially designed for buck derived topologies like forward or push-pull converters. The high flexibility of the transformers allows developers to realize their own transformers without having to resort to a customer-specific transformer. Power levels of between 1 and 50 Watts can be transformed with the WE-FLEX series transformers. They can be used at switching frequencies of up to 1 MHz.

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