WE-TDC SMT Shielded Coupled Inductor

	Size	L (mm)	W (mm)	H (mm)
	8018	8	8	1.8
	8038	8	8	3.8

Characteristics

Core material: NiZn
Low profile
Magnetical shielded which results in a low leakage field
8x8 mm case
Operating temperature range -40 up to 125°C
1:1 transformer
Low self-losses
Higher Self Resonant Frequency
Low leakage inductance
Coupled inductor with two identical windings
Recommended solder profile: Reflow

Applications

Non-Isolated Flyback Converter
Buck or Boost with auxiliary winding
BUCK-BOOST, SEPIC, ZETA & CUK Converter
Switching regulators with second, unregulated output voltage

An Excellent Duet!

The WE-MCRI is an innovative molded coupled inductor with fully automated bifilar winding process. It offers an almost ideal coupling coefficient up to 0.995.

Product video and more

Products

All

8018

8038

Order Code	Datasheet	Downloads	L₁ (µH)	L₂ (µH)	I_R (A)	I_{R 2} (A)	I_SAT (A)	R_{DC1 typ} (Ω)	R_{DC2 typ} (Ω)	R_{DC1 max} (Ω)	R_{DC2 max} (Ω)	f_{res 1} (MHz)	Design Kit
744894300033	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	0.33	0.33	4	4	9	0.0111	0.0111	0.015	0.015	280	744894
744894300068	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	0.68	0.68	3.3	3.3	6.5	0.0163	0.0163	0.021	0.021	190	744894
74489430010	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	1	1	2.85	2.85	5.1	0.0222	0.0222	0.028	0.028	136	744894
74489430022	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	2.2	2.2	1.9	1.9	3.5	0.0495	0.0495	0.058	0.058	85	744894
74489430027	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	2.7	2.7	1.85	1.85	3	0.0695	0.0695	0.805	0.0805	65	744894
74489430039	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	3.9	3.9	1.6	1.6	2.55	0.082	0.082	0.094	0.094	60	744894
74489430056	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	5.6	5.6	1.45	1.45	2.2	0.114	0.114	0.131	0.131	50	744894
74489430068	SPEC	6 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Download all 6 files as zip archive ZIP	6.8	6.8	1.25	1.25	2	0.128	0.128	0.146	0.146	46	744894
74489430100	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	10	10	1	1	1.65	0.19	0.19	0.215	0.215	35	744894
74489430120	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	12	12	0.95	0.95	1.55	0.202	0.202	0.227	0.227	33	744894
74489430150	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	15	15	0.85	0.85	1.25	0.275	0.275	0.308	0.295	29	744894
74489430180	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	18	18	0.8	0.8	1.2	0.345	0.345	0.38	0.38	27	744894
74489430220	SPEC	6 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8018 (rev1).igs \| 2.2 MB STP WE-TDC_8018 (rev1).stp \| 603.6 KB Download all 6 files as zip archive ZIP	22	22	0.7	0.7	1.1	0.435	0.435	0.48	0.48	17	744894
744894400039	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	0.39	0.39	4.5	4.5	14	0.0116	0.0116	0.0145	0.0145	210	744894
744894400082	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	0.82	0.82	3.7	3.7	9.6	0.0159	0.0159	0.02	0.02	140	744894
74489440012	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	1.2	1.2	3.05	3.05	7.5	0.0202	0.0202	0.026	0.026	90	744894
74489440018	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	1.8	1.8	2.85	2.85	5.8	0.0255	0.0255	0.031	0.031	60	744894
74489440027	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	2.7	2.7	2.5	2.5	5.1	0.0345	0.0345	0.04	0.04	55	–
74489440036	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	3.6	3.6	2.3	2.3	4.6	0.047	0.047	0.053	0.053	45	–
74489440047	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	4.7	4.7	1.85	1.85	4.2	0.0545	0.0545	0.064	0.064	30	744894
74489440068	SPEC	6 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Download all 6 files as zip archive ZIP	6.8	6.8	1.45	1.45	3.2	0.088	0.088	0.1	0.1	25	744894
74489440100	SPEC	6 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Download all 6 files as zip archive ZIP	10	10	1.35	1.35	2.6	0.113	0.113	0.128	0.128	23	744894
74489440120	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	12	12	1.3	1.3	2.3	0.117	0.117	0.132	0.132	20	744894
74489440150	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	15	15	1.1	1.1	2.2	0.165	0.165	0.185	0.185	17	744894
74489440180	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	18	18	1.05	1.05	1.9	0.179	0.179	0.201	0.201	15	744894
74489440220	SPEC	8 files EDA models: Components ZIP ALT WE-TDC (rev20a).IntLib \| 221.5 KB ZUK Download_Cadstar_WE-TDC (rev19a).zip \| 10.3 KB CDS Cadence_WE-TDC (rev20a).zip \| 987.2 KB EAG Eagle_WE-TDC (rev19a).lbr \| 40 KB CAD files ZIP IGS WE-TDC_8038 (rev1).igs \| 2.2 MB STP WE-TDC_8038 (rev1).stp \| 603.5 KB Electric models ZIP LT LTSpice_WE-TDC (rev20a).zip \| 33.2 KB PSP PSpice_WE-TDC (rev20a).zip \| 7.7 KB Download all 8 files as zip archive ZIP	22	22	1	1	1.8	0.203	0.203	0.228	0.228	14	744894

Order Code	Datasheet	Simulation
744894300033	SPEC
744894300068	SPEC
74489430010	SPEC
74489430022	SPEC
74489430027	SPEC
74489430039	SPEC
74489430056	SPEC
74489430068	SPEC
74489430100	SPEC
74489430120	SPEC
74489430150	SPEC
74489430180	SPEC
74489430220	SPEC
744894400039	SPEC
744894400082	SPEC
74489440012	SPEC
74489440018	SPEC
74489440027	SPEC
74489440036	SPEC
74489440047	SPEC
74489440068	SPEC
74489440100	SPEC
74489440120	SPEC
74489440150	SPEC
74489440180	SPEC
74489440220	SPEC

Samples

Order Code	Datasheet	Simulation	Downloads	L₁ (µH)	L₂ (µH)	I_R (A)	I_{R 2} (A)	I_SAT (A)	R_{DC1 typ} (Ω)	R_{DC2 typ} (Ω)	R_{DC1 max} (Ω)	R_{DC2 max} (Ω)	f_{res 1} (MHz)	Design Kit	Samples

Assortments

Articles from this product series can be found in the following assortments:

Design Kit WE-TDC SMT Shielded Coupled Inductor

Videos

WE-MCRI – Innovative Molded Coupled Inductor by Würth Elektronik eiSos

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