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

All

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	SamplesAvailability & Sample
	749196540	SPEC3.4 µH, 1.91 A, 4.18 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base3.4 µH	Rated Current Base1.91 A	Saturation Current Base4.18 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base65.6 µVs	DC Resistance Base30 mΩ	SizeEFD20	Typegapped	–Check availability
	749196530	SPEC4.3 µH, 1.91 A, 2.91 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base4.3 µH	Rated Current Base1.91 A	Saturation Current Base2.91 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base65.6 µVs	DC Resistance Base30 mΩ	SizeEFD20	Typegapped	–Check availability
	749196520	SPEC5.3 µH, 1.91 A, 2.53 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base5.3 µH	Rated Current Base1.91 A	Saturation Current Base2.53 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base65.6 µVs	DC Resistance Base30 mΩ	SizeEFD20	Typegapped	–Check availability
	749196241	SPEC6.6 µH, 0.95 A, 1.55 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base6.6 µH	Rated Current Base0.95 A	Saturation Current Base1.55 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base48.3 µVs	DC Resistance Base159 mΩ	SizeER14.5/6	Typegapped	–Check availability
	749196541	SPEC7.6 µH, 1.7 A, 2.46 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base7.6 µH	Rated Current Base1.7 A	Saturation Current Base2.46 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base98.4 µVs	DC Resistance Base71.1 mΩ	SizeEFD20	Typegapped	–Check availability
	749196341	SPEC7.9 µH, 0.97 A, 1.33 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base7.9 µH	Rated Current Base0.97 A	Saturation Current Base1.33 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base39.8 µVs	DC Resistance Base140 mΩ	SizeEFD15	Typegapped	–Check availability
	749196231	SPEC8.3 µH, 0.95 A, 1.2 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base8.3 µH	Rated Current Base0.95 A	Saturation Current Base1.2 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base48.3 µVs	DC Resistance Base159 mΩ	SizeER14.5/6	Typegapped	–Check availability
	749196141	SPEC8.5 µH, 0.55 A, 0.96 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base8.5 µH	Rated Current Base0.55 A	Saturation Current Base0.96 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base32.9 µVs	DC Resistance Base344 mΩ	SizeER11/5	Typegapped	–Check availability
	749196331	SPEC9.3 µH, 0.97 A, 1.09 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base9.3 µH	Rated Current Base0.97 A	Saturation Current Base1.09 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base39.8 µVs	DC Resistance Base140 mΩ	SizeEFD15	Typegapped	–Check availability
	749196531	SPEC9.7 µH, 1.7 A, 2.2 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base9.7 µH	Rated Current Base1.7 A	Saturation Current Base2.2 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base98.4 µVs	DC Resistance Base71.1 mΩ	SizeEFD20	Typegapped	–Check availability
	749196510	SPEC9.9 µH, 1.91 A, 1.17 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base9.9 µH	Rated Current Base1.91 A	Saturation Current Base1.17 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base65.6 µVs	DC Resistance Base30 mΩ	SizeEFD20	Typegapped	–Check availability
	749196131	SPEC10.9 µH, 0.55 A, 0.73 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base10.9 µH	Rated Current Base0.55 A	Saturation Current Base0.73 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base32.9 µVs	DC Resistance Base344 mΩ	SizeER11/5	Typegapped	–Check availability
	749196221	SPEC11.6 µH, 0.95 A, 0.84 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base11.6 µH	Rated Current Base0.95 A	Saturation Current Base0.84 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base48.3 µVs	DC Resistance Base159 mΩ	SizeER14.5/6	Typegapped	–Check availability
	749196521	SPEC12 µH, 1.7 A, 1.73 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base12 µH	Rated Current Base1.7 A	Saturation Current Base1.73 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base98.4 µVs	DC Resistance Base71.1 mΩ	SizeEFD20	Typegapped	–Check availability
	749196321	SPEC14.2 µH, 0.97 A, 0.63 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base14.2 µH	Rated Current Base0.97 A	Saturation Current Base0.63 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base39.8 µVs	DC Resistance Base140 mΩ	SizeEFD15	Typegapped	–Check availability
	749196121	SPEC14.7 µH, 0.55 A, 0.54 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base14.7 µH	Rated Current Base0.55 A	Saturation Current Base0.54 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base32.9 µVs	DC Resistance Base344 mΩ	SizeER11/5	Typegapped	–Check availability
	749196211	SPEC21.6 µH, 0.95 A, 0.36 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base21.6 µH	Rated Current Base0.95 A	Saturation Current Base0.36 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base48.3 µVs	DC Resistance Base159 mΩ	SizeER14.5/6	Typegapped	–Check availability
	749196511	SPEC22.3 µH, 1.7 A, 0.49 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base22.3 µH	Rated Current Base1.7 A	Saturation Current Base0.49 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base98.4 µVs	DC Resistance Base71.1 mΩ	SizeEFD20	Typegapped	–Check availability
	749196311	SPEC23.3 µH, 0.97 A, 0.33 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base23.3 µH	Rated Current Base0.97 A	Saturation Current Base0.33 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base39.8 µVs	DC Resistance Base140 mΩ	SizeEFD15	Typegapped	–Check availability
	749196111	SPEC27.4 µH, 0.55 A, 0.22 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base27.4 µH	Rated Current Base0.55 A	Saturation Current Base0.22 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base32.9 µVs	DC Resistance Base344 mΩ	SizeER11/5	Typegapped	–Check availability
	749196500	SPEC87.1 µH, 1.91 A, 0.03 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base87.1 µH	Rated Current Base1.91 A	Saturation Current Base0.03 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base65.6 µVs	DC Resistance Base30 mΩ	SizeEFD20	Typeungapped	–Check availability
	749196201	SPEC140 µH, 0.95 A, 0.02 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base140 µH	Rated Current Base0.95 A	Saturation Current Base0.02 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base48.3 µVs	DC Resistance Base159 mΩ	SizeER14.5/6	Typeungapped	–Check availability
	749196301	SPEC153.8 µH, 0.97 A, 0.02 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base153.8 µH	Rated Current Base0.97 A	Saturation Current Base0.02 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base39.8 µVs	DC Resistance Base140 mΩ	SizeEFD15	Typeungapped	–Check availability
	749196501	SPEC196 µH, 1.7 A, 0.02 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base196 µH	Rated Current Base1.7 A	Saturation Current Base0.02 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base98.4 µVs	DC Resistance Base71.1 mΩ	SizeEFD20	Typeungapped	–Check availability
	749196101	SPEC198.6 µH, 0.55 A, 0.01 A	Availability –	Downloads8 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 Activei\| Production is active. Expected lifetime: >10 years.	Inductance Base198.6 µH	Rated Current Base0.55 A	Saturation Current Base0.01 A	Turns Ratio1:1:1:1:1:1	Insulation Test Voltage500 V (AC)	Voltage-µSecond Base32.9 µVs	DC Resistance Base344 mΩ	SizeER11/5	Typeungapped	–Check availability

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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