WE-UNIT Off-Line Transformers

Würth Elektronik Midcom WE-UNIT Off-Line Transformers are designed for use in AC/DC switch-mode power supplies. These transformers work with a wide input voltage range from 125VDC to 375VDC with an isolation voltage of 4kV. The UNIT series uses the standard bobbins and core sizes EE13 and EE16, which guarantees short lead times. Both the EE13 and EE16 sizes are offered in a vertical and horizontal layout. Typical applications for Würth Elektronik Midcom WE-UNIT Off-Line Transformers include tiny switch ICs and SMPS with universal input from 85VAC to 265VAC.

Results: 60
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Secondary Voltage Rating
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Secondary Current Rating
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Secondary Winding
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Width
Height
Series
Wurth Elektronik Power Transformers MID-OLLT LT3798 300 uH 48 W
Datasheet
2,636In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 24 V 48 W 2 A Through Hole Dual Primary Winding Dual Secondary Winding 31 mm 31 mm 25 mm MID-OLLT
Wurth Elektronik Power Transformers MID-FLYLT LT8300 400 uH 1.5 W
Datasheet
1,978In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 400

Flyback Transformers 18 V to 75 V 5 V 1.5 W 300 mA SMD/SMT Dual Primary Winding Single Secondary Winding 10.16 mm 13.36 mm 8.64 mm MID-FLYLT


Wurth Elektronik Power Transformers WE-UNIT 5.6W SMD Offline Trnsfmr
Datasheet
920In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 175

Power 55 VAC to 265 VAC 12 V 5 W 420 mA SMD/SMT Dual Primary Winding Dual Secondary Winding 13.8 mm 23.9 mm 11 mm MID-OLEE
Wurth Elektronik Power Transformers MID-FLYLT LT8300 300 uH 3.6 W
Datasheet
1,435In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 400

POE - Power Over Ethernet Transformers 30 V to 72 V 12 V 3.6 W 300 mA SMD/SMT Dual Primary Winding Single Secondary Winding 10.16 mm 13.36 mm 8.64 mm MID-FLYLT
Wurth Elektronik Power Transformers WE-UNIT Offline 245uH .21A 1.2Ohm
Datasheet
50In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 24 V 3 W 125 mA Through Hole Single Primary Winding Single Secondary Winding 15 mm 11 mm 16.8 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 175uH .85A 26Ohm
Datasheet
127In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 5 V 9 W 600 mA Through Hole Single Primary Winding Single Secondary Winding 18 mm 16.5 mm 18 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 280uH .2A .05Ohm
Datasheet
175In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 5 V 3 W 600 mA Through Hole Single Primary Winding Single Secondary Winding 15 mm 11 mm 16.8 mm WE-UNIT
Wurth Elektronik Power Transformers MID-OLLT LT3798 180 uH 108 W
Datasheet
158In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 36 V 108 W 3 A Through Hole Dual Primary Winding Triple Secondary Winding 39.6 mm 43.18 mm 30.48 mm MID-OLLT
Wurth Elektronik Power Transformers MID-UNIT STM Offline 1.60mH 6.20Ohm
Datasheet
1,066In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 424 VAC 12 V 6 W 500 mA Through Hole Single Primary Winding Single Secondary Winding 13.72 mm 20.45 mm 10.8 mm MID-OLSTM
Wurth Elektronik Power Transformers MID-OLPI UCC28700 1.67 mH 6 W
Datasheet
821In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 5 V 6 W 1.2 A Through Hole Single Primary Winding Single Secondary Winding 16.9 mm 18.8 mm 13 mm MID-OLPI
Wurth Elektronik Power Transformers WE-UNIT 4W SMD Offline Trnsfmr
Datasheet
578In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 175

Power 55 VAC to 265 VAC 15 V 3.2 W 210 mA SMD/SMT Dual Primary Winding Single Secondary Winding 13.8 mm 23.9 mm 11 mm MID-OLEE
Wurth Elektronik Power Transformers WE-UNIT 4.6W SMD Offline Trnsfmr
Datasheet
164In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 175

Power 55 VAC to 265 VAC 5 V 3.5 W 700 mA SMD/SMT Dual Primary Winding Dual Secondary Winding 13.8 mm 23.9 mm 11 mm MID-OLEE
Wurth Elektronik Power Transformers WE-UNIT 5.8W SMD Offline Trnsfmr
Datasheet
139In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 175

Power 55 VAC to 265 VAC 5 V 4.5 W 900 mA SMD/SMT Dual Primary Winding Dual Secondary Winding 13.8 mm 23.9 mm 11 mm MID-OLEE
Wurth Elektronik Power Transformers MID-UNIT NXP Offline 2.38mH 1Ohm
Datasheet
Product Comments
91In Stock
1,050Expected 05/03/2026
Min.: 1
Mult.: 1

Power 85 VAC to 272 VAC 12 V 7.2 W 600 mA Through Hole Single Primary Winding Dual Secondary Winding 20 mm 24.38 mm 16 mm MID-OLSTM
Wurth Elektronik Power Transformers MID-OLSTM L6599A 1.396 mH 12 W
Datasheet
231In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V, 12 V 12 W 500 mA, 500 mA Through Hole Single Primary Winding Dual Secondary Winding 22.2 mm 25 mm 16 mm MID-OLSTM
Wurth Elektronik Power Transformers WE-UNIT Offline 220uH .21A .29Ohm
Datasheet
21In Stock
132Expected 20/02/2026
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V 3 W 250 mA Through Hole Single Primary Winding Single Secondary Winding 15 mm 11 mm 16.8 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 175uH .21A .29Ohm
Datasheet
138In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V 3 W 250 mA Through Hole Single Primary Winding Single Secondary Winding 21.5 mm 15 mm 12 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 180uH .2A .05Ohm
Datasheet
57In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 5 V 3 W 600 mA Through Hole Single Primary Winding Single Secondary Winding 21.5 mm 15 mm 12 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 112uH .85A 28Ohm
Datasheet
9In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V 8.4 W 250 mA Through Hole Single Primary Winding Dual Secondary Winding 24.5 mm 20.2 mm 16.5 mm WE-UNIT
Wurth Elektronik Power Transformers MID-FLYLT LT8300 300 uH 1.7 W
Datasheet
1,156Expected 07/04/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 400

Flyback Transformers 22 V to 72 V 3.3 V 1.7 W 500 mA SMD/SMT Dual Primary Winding Single Secondary Winding 10.16 mm 13.36 mm 8.64 mm MID-FLYLT


Wurth Elektronik Power Transformers MID-OLTI UCC28720 1.5 mH 5 W
Datasheet
300In Stock
1,056Expected 18/06/2026
Min.: 1
Mult.: 1

Flyback Transformers 85 VAC to 265 VAC 5 V 5 W 1 A Through Hole Dual Primary Winding Single Secondary Winding 13.97 mm 13.97 mm 12.7 mm MID-OLTI
Wurth Elektronik Power Transformers MID-UNIT STM Offline 4mH 1.60Ohm
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 5 V 5 W 1 A Through Hole Single Primary Winding Dual Secondary Winding 20 mm 24 mm 16 mm MID-OLSTM
Wurth Elektronik Power Transformers WE-UNIT Offline 172uH .21A 1.2Ohm
Datasheet
Non-Stocked
Min.: 180
Mult.: 180

Power 85 VAC to 265 VAC 24 V 3 W 125 mA Through Hole Single Primary Winding Single Secondary Winding 21.5 mm 15 mm 12 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 145uH .85A 26Ohm
Datasheet
Non-Stocked Lead-Time 21 Weeks
Min.: 154
Mult.: 154

Power 85 VAC to 265 VAC 12 V 8.4 W 250 mA Through Hole Single Primary Winding Dual Secondary Winding 18 mm 16.5 mm 18 mm WE-UNIT
Wurth Elektronik Power Transformers WE-UNIT Offline 145uH 4.5A 210Ohm
Datasheet
Non-Stocked
Min.: 154
Mult.: 154

Power 85 VAC to 265 VAC 24 V 9.6 W 125 mA Through Hole Single Primary Winding Single Secondary Winding 18 mm 16.5 mm 18 mm WE-UNIT