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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Description Datasheet Availability Pricing (CRC) 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 - 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-OLTI TPS23758 150uH 5V 2.4A Flyback 250kHz 12W
Datasheet
3In Stock
3 375On Order
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount MID-OLPI UCC28700 1.67 mH 6 W
Datasheet
377In Stock
1 530On 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-OLEFD EFD20 SMD .8uH 1.4A 12V
Datasheet
138In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 120

Power 120 VAC to 375 VAC 12 V, 12 V 24 W 1 A, 1 A SMD/SMT Dual Primary Winding Dual Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 125-375V 68-170kHz
Datasheet
89In 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 - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 24V
Datasheet
147In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 120

Power 85 VAC to 265 VAC 24 V, 24 V 24 W 500 mA, 500 mA SMD/SMT Dual Primary Winding Dual Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLLT LT3798 600 uH 14 W
Datasheet
294In Stock
Min.: 1
Mult.: 1

Flyback Transformers 90 VAC to 265 VAC 14 V 14 W 1 A Through Hole Single Primary Winding Dual Secondary Winding 18 mm 16.5 mm 18 mm MID-OLLT
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-UOST Univ Offline 1250uH 0.8A 2920mOhm
Datasheet
202In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 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 - Board Mount WE-LLCR Size ETD39 500uH 200W 12V
Datasheet
13In 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 - Board Mount WE-LLCR Size ETD39 500uH 200W 24V
Datasheet
4In Stock
30Expected 9/4/2026
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 - Board Mount WE-LLCR NCP1399Size ETD39 5 00uH 200W 48V
Datasheet
9In Stock
15Expected 9/25/2026
Min.: 1
Mult.: 1

Power 255 VAC to 283 VAC 48 V 200 W 4.2 A Through Hole Single Primary Winding Dual Secondary Winding 44 mm 43 mm 30 mm WE-LLCR
Wurth Elektronik Power Transformers - Board Mount WE-LLCR Size ETD44 400uH 250W 24V
Datasheet
5In Stock
75Expected 8/28/2026
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 - Board Mount MID-OLTI 120V 12V 5W
Datasheet
94In 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 - Board Mount MID-OLSTM 85-265V 80kHz
Datasheet
8In Stock
Min.: 1
Mult.: 1

Offline Transformers 85 VAC to 265 VAC 4.5 V, 13 V 9.6 W 100 mA, 700 mA Through Hole Single Primary Winding Dual Secondary Winding 17.04 mm 13.84 mm 22.55 mm MID-OLSTM
Wurth Elektronik Power Transformers - Board Mount MID-OLTI UCC28711 450 uH
Datasheet
29In Stock
Min.: 1
Mult.: 1

Transformers 120 VDC to 375 VDC 16.7 V 50 mA Through Hole Dual Primary Winding Single Secondary Winding 26.3 mm 33 mm 14.3 mm MID-OLTI
Wurth Elektronik Power Transformers - Board Mount MID-OLSTM Viper114LS 1.2 mH
Datasheet
110In Stock
Min.: 1
Mult.: 1

Transformers 85 VAC 5 V 1.2 A Through Hole Single Primary Winding Dual Secondary Winding 15 mm 15.75 mm 18.5 mm MID-OLSTM
Wurth Elektronik Power Transformers - Board Mount MID-OLEE 78-265V 50000kHz
Datasheet
89In 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
Wurth Elektronik Power Transformers - Board Mount MID-OLEE 78-375V 50000kHz
Datasheet
88In Stock
Min.: 1
Mult.: 1

Power 55 VAC to 265 VAC 15 V 4.8 W 320 mA Through Hole Dual Primary Winding Single Secondary Winding 14.2 mm 20.45 mm 14.6 mm MID-OLEE
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 40V
Datasheet
63In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 120

Power 85 VAC to 265 VAC 40 V 24 W 600 mA SMD/SMT Dual Primary Winding Single Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLLT LT3798 461 uH 45 W
Datasheet
43In Stock
Min.: 1
Mult.: 1

Flyback Transformers 85 VAC to 265 VAC 125 V 45 W 360 mA Through Hole Dual Primary Winding Dual Secondary Winding 31 mm 31 mm 25 mm MID-OLLT
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 TH .8uH 1.4A 12V
Datasheet
27In Stock
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 12 V, 12 V 20.4 W 850 mA, 850 mA Through Hole Dual Primary Winding Dual Secondary Winding 21.5 mm 29 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 5V
Datasheet
89In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 120

Power 85 VAC to 265 VAC 5 V, 5 V, 7 V 20.2 W 1.1 A, 1.25 A, 1.25 A SMD/SMT Dual Primary Winding Triple Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD