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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Description Datasheet Availability Pricing (CHF) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Product
Primary Voltage Rating
Secondary Voltage Rating
Power Rating
Secondary Current Rating
Mounting Style
Primary Winding
Secondary Winding
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Width
Height
Series
Wurth Elektronik Power Transformers - Board Mount MID-FLYLT LT8300 300 uH 3.6 W
Datasheet
1’322In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-UNIT 5.6W SMD Offline Trnsfmr
Datasheet
880In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-UNIT Offline 245uH .21A 1.2Ohm
Datasheet
140In 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 - Board Mount 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 - Board Mount MID-OLLT LT3798 180 uH 108 W
Datasheet
142In Stock
1’000Expected 12/17/2026
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 - Board Mount MID-OLSTM L6599A 1.396 mH 12 W
Datasheet
223In 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 - Board Mount WE-UNIT Offline 280uH .2A .05Ohm
Datasheet
171In 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 - Board Mount MID-FLYLT LT8300 300 uH 1.7 W
Datasheet
885In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount MID-UNIT STM Offline 1.60mH 6.20Ohm
Datasheet
556In 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 - Board Mount MID-OLTI UCC28720 1.5 mH 5 W
Datasheet
903In Stock
176On Order
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 - Board Mount WE-UNIT Offline 175uH .21A .29Ohm
Datasheet
106In 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 - Board Mount WE-UNIT Offline 112uH .85A 28Ohm
Datasheet
6In 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 - Board Mount MID-FLYLT LT8300 400 uH 1.5 W
Datasheet
67In Stock
1’200Expected 11/26/2026
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-UNIT 5.8W SMD Offline Trnsfmr
Datasheet
34In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-UNIT 4W SMD Offline Trnsfmr
Datasheet
23In Stock
700On Order
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-UNIT 4.6W SMD Offline Trnsfmr
Datasheet
164In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount MID-OLLT LT3798 300 uH 48 W
Datasheet
4’410On Order
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 - Board Mount MID-OLPI UCC28700 1.67 mH 6 W
Datasheet
1’907On Order
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 - Board Mount MID-UNIT NXP Offline 2.38mH 1Ohm
Datasheet
Product Comments
2’100On Order
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 - Board Mount WE-UNIT Offline 220uH .21A .29Ohm
Datasheet
32Expected 9/4/2026
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 - Board Mount WE-UNIT Offline 172uH .21A 1.2Ohm
Datasheet
Non-Stocked Lead-Time 19 Weeks
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 - Board Mount WE-UNIT Offline 180uH .2A .05Ohm
Datasheet
Non-Stocked Lead-Time 19 Weeks
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 - Board Mount WE-UNIT Offline 145uH .85A 26Ohm
Datasheet
Non-Stocked Lead-Time 19 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 - Board Mount WE-UNIT Offline 145uH 4.5A 210Ohm
Datasheet
Non-Stocked Lead-Time 19 Weeks
Min.: 1
Mult.: 1

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
Wurth Elektronik Power Transformers - Board Mount WE-UNIT Offline 100uH .8A 94Ohm
Datasheet
Non-Stocked Lead-Time 19 Weeks
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 24 V 9.6 W 125 mA Through Hole Single Primary Winding Single Secondary Winding 24.5 mm 20.2 mm 16.5 mm WE-UNIT