WE-OLEFD Offline Transformers

Würth Elektronik WE-OLEFD Offline Transformers include transformers crafted for AC/DC converters featuring a versatile output voltage range of 85VAC to 265VAC. These modules are engineered to comply with IEC 61558-2-16 standards for reinforced 400VDC operating voltage. Würth Elektronik WE-OLEFD Offline Transformers come in EFD20 THT, EFD20 SMT, and EFD25 THT low-profile package variants. The switching frequency of the offline transformers spans from 68kHz to 250kHz.

Results: 24
Select Image Part #
 Mfr.
Description Datasheet Availability Pricing (CAD) 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 MID-OLEFD EFD20 SMD .8uH 1.4A 12V
Datasheet
292In 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
93In 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
168In 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
57In 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 - 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-OLEFD EFD20 TH .8uH 1.4A 12V
Datasheet
43In 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
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 TH .8uH 1.4A 24V
Datasheet
294In Stock
714Expected 2026-05-14
Min.: 1
Mult.: 1

Power 85 VAC to 265 VAC 24 V, 24 V 19.2 W 1.4 A 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 16V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,080
Mult.: 120
: 120

Power 85 VAC to 265 VAC 16 V 20.8 W 1.3 A 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-OLEFD EFD20 TH .8uH 1.4A 16V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 16 V 18.4 W 1.15 A Through Hole Dual Primary Winding Single Secondary Winding 21.5 mm 29 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 125-375V 68-110kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 16 V 25.6 W 1.6 A Through Hole Dual Primary Winding Single Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 32V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,080
Mult.: 120
: 120

Power 85 VAC to 265 VAC 32 V 24 W 750 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-OLEFD EFD20 TH .8uH 1.4A 32V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 32 V 24 W 750 mA Through Hole Dual Primary Winding Single Secondary Winding 21.5 mm 29 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 TH .8uH 1.4A 40V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 40 V 23.2 W 580 mA SMD/SMT Dual Primary Winding Single Secondary Winding 21.5 mm 29 mm 12 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 125-375V 68-100kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 32 V 32 W 1 A Through Hole Dual Primary Winding Single Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 125-375V 68-105kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 40 V 32 W 800 mA Through Hole Dual Primary Winding Single Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 85-265V 68-120kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 5 V 15.8 W 1.575 A, 1.575 A SMD/SMT 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 5V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,080
Mult.: 120
: 120

Power 85 VAC to 265 VAC 5 V, 5 V 20 W 2 A, 2 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 EFD20 TH .8uH 1.4A 5V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 5 V 13 W 1.3 A, 1.3 A 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 TH .8uH 1.4A 12V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 12 V 19.8 W 900 mA, 1.8 A 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 TH .8uH 1.4A 5V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 24 V 20.9 W 620 mA, 1.2 A 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 125-375V 68-170kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 12 V 32.5 W 1.7 A, 2 A SMD/SMT Dual Primary Winding Dual Secondary Winding 26.3 mm 33 mm 14 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD 125-375V 68-170kHz
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,008
Mult.: 42

Power 85 VAC to 265 VAC 5 V, 24 V 19.9 W 600 mA, 1.1 A SMD/SMT Dual Primary Winding Dual Secondary Winding 26.3 mm 33 mm 14.81 mm WE-OLEFD
Wurth Elektronik Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 5V
Datasheet
Non-Stocked Lead-Time 17 Weeks
Min.: 1,080
Mult.: 120
: 120

Power 85 VAC to 265 VAC 5 V, 5 V, 19 V 22.5 W 500 mA, 1.3 A, 1.3 A SMD/SMT Dual Primary Winding Triple Secondary Winding 21.5 mm 33.8 mm 12 mm WE-OLEFD