AC/DC Converter Transformers

Würth Elektronik AC/DC Converter Transformers are designed for offline power applications and meet relevant safety standards and dielectric requirements. AC/DC transformers feature universal offline input with many options for output voltages and offer THT, SMT, and single or multiple output options. Würth Elektronik AC/DC Converter Transformers are ideal for offline switch-mode power supplies (SMPS) used in industrial controls, metering, smart adapters, and auxiliary power supply applications. 

Results: 185
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (EUR) 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
Length
Width
Height
Series
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 MID-OLTI UCC28722 1.35 mH 6 W
Datasheet
165In Stock
Min.: 1
Mult.: 1

Flyback Transformers 85 VAC to 265 VAC 12 V 6 W 500 mA Through Hole Dual Primary Winding Single Secondary Winding 16.9 mm 18.8 mm 13.31 mm MID-OLTI
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-UOST Univ Offline 1250uH 0.8A 2920mOhm
Datasheet
260In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 150

Power 85 VAC to 265 VAC 12 V 6.6 W 550 mA SMD/SMT Single Primary Winding Dual Secondary Winding 25.81 mm 16.6 mm 13.5 mm WE-UOST
Wurth Elektronik Power Transformers WE-LLCR Size ETD34 600uH 150W 24V
Datasheet
24In Stock
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 24 V 150 W 6.2 A Through Hole Single Primary Winding Dual Secondary Winding 36 mm 36 mm 26 mm WE-LLCR
Wurth Elektronik Power Transformers WE-LLCR Size ETD39 500uH 200W 24V
Datasheet
9In Stock
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 24 V 200 W 8.3 A Through Hole Single Primary Winding Dual Secondary Winding 44 mm 43 mm 30 mm WE-LLCR
Wurth Elektronik Power Transformers WE-LLCR FAN7688Size ETD44 4 75uH 250W 12V
Datasheet
13In Stock
15Expected 20/02/2026
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 12 V 250 W 20.8 A Through Hole Single Primary Winding Dual Secondary Winding 48 mm 46 mm 27.5 mm WE-LLCR
Wurth Elektronik Power Transformers WE-LLCR Size ETD44 400uH 250W 24V
Datasheet
45In Stock
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 24 V 250 W 10.4 A Through Hole Single Primary Winding Dual Secondary Winding 48 mm 46 mm 27.5 mm WE-LLCR
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-OLTI 120V 12V 5W
Datasheet
104In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 130 VAC 12 V 5 W 417 mA Through Hole Dual Primary Winding Single Secondary Winding 17.96 mm 20.3 mm 14.3 mm MID-OLTI
Wurth Elektronik Power Transformers MID-OLTI UCC28910 1.1 mH 6 W
Datasheet
56In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 70

Signal Transformers 85 VAC to 265 VAC 5 V 6 W 1.2 A Through Hole Single Primary Winding Single Secondary Winding 20.32 mm 24.38 mm 16 mm MID-OLTI
Wurth Elektronik Power Transformers MID-OLTI TPS23758 150uH 5V 2.4A Flyback 250kHz 12W
Datasheet
257In Stock
1,250Expected 12/03/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 125

Flyback Transformers 36 VDC to 57 VDC 5 V 2 A Board Mount Single Primary Winding Dual Secondary Winding 13.97 mm 18.25 mm 14.5 mm MID-OLTI


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-OLEFD 125-375V 68-170kHz
Datasheet
118In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V, 12 V 31.2 W 1.3 A, 1.3 A Through Hole Dual Primary Winding Dual Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers MID-OLEFD 125-375V 68-100kHz
Datasheet
67In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 24 V, 24 V 34.1 W 710 mA, 710 mA Through Hole Dual Primary Winding Dual Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers MID-OLEFD EFD20 SMD .8uH 1.4A 5V
Datasheet
89In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 120

Power 85 VAC to 265 VAC 5 V, 5 V, 7 V 20.2 W 1.25 A, 1.25 A, 1.1 A SMD/SMT Dual Primary Winding Triple Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers WE-LLCR Size ETD39 500uH 200W 12V
Datasheet
18In Stock
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 12 V 200 W 16.7 A Through Hole Single Primary Winding Dual Secondary Winding 44 mm 43 mm 30 mm WE-LLCR
Wurth Elektronik Power Transformers MID-OLSTM 85-265V 80kHz
Datasheet
8In Stock
Min.: 1
Mult.: 1

Offline Transformers 85 VAC to 265 VAC 13 V, 4.5 V 9.6 W 700 mA, 100 mA Through Hole Single Primary Winding Dual Secondary Winding 17.04 mm 13.84 mm 22.55 mm MID-OLSTM
Wurth Elektronik Power Transformers MID-OLEE 78-265V 50000kHz
Datasheet
101In Stock
Min.: 1
Mult.: 1

Power 55 VAC to 265 VAC 12 V 5.4 W 450 mA Through Hole Dual Primary Winding Single Secondary Winding 14.2 mm 20.45 mm 14.6 mm MID-OLEE