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
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Secondary Voltage Rating
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Secondary Current Rating
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Secondary Winding
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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 2026-03-05
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 2026-02-20
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 2026-02-20
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 2026-03-12
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 2026-06-18
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