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. 

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Description Datasheet Availability Pricing (SGD) Filter the results in the table by unit price based on your quantity.
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Secondary Voltage Rating
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Secondary Current Rating
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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-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-OLTI UCC28722 1.35 mH 6 W
Datasheet
52In Stock
1,080Expected 30/7/2026
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 - 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
92In 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-OLEFD 125-375V 68-100kHz
Datasheet
2In Stock
84Expected 6/8/2026
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 - 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 MID-OLLT LT3798 600 uH 14 W
Datasheet
301In Stock
700Expected 10/7/2026
Min.: 1
Mult.: 1

Flyback Transformers 85 VAC to 265 VAC 28 V 14 W 500 mA 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 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 WE-UNIT 5.8W SMD Offline Trnsfmr
Datasheet
134In 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-UOST Univ Offline 1250uH 0.8A 2920mOhm
Datasheet
217In 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-UOST Univ Offline 1250uH 0.8A 3000mOhm
Datasheet
145In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 150

Power 85 VAC to 265 VAC 24 V 6.7 W 280 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
14In 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 4/9/2026
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
11In Stock
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
23In 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 - Board Mount 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 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
93In 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
45In 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
38In 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