Power Transformers - Board Mount

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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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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (JPY) Filter the results in the table by unit price based on your quantity.	Qty.	Product	Primary Voltage Rating	Secondary Voltage Rating	Power Rating	Secondary Current Rating	Mounting Style	Primary Winding	Secondary Winding	Length	Width	Height	Series
Power Transformers - Board Mount MID-OLTI TPS23758 150uH 5V 2.4A Flyback 250kHz 12W 750318525 Wurth Elektronik 1: ¥687.7 2,349In Stock	Mfr. Part # 750318525 Mouser Part # 710-750318525	Wurth Elektronik	Power Transformers - Board Mount MID-OLTI TPS23758 150uH 5V 2.4A Flyback 250kHz 12W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	2,349In Stock	Cut Tape ¥687.7 ¥637.8 ¥566.4 ¥491.7 Reel ¥455.1 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
Power Transformers - Board Mount MID-OLTI UCC28720 1.5 mH 5 W 7508110151 Wurth Elektronik 1: ¥709.2 842In Stock	Mfr. Part # 7508110151 Mouser Part # 710-7508110151	Wurth Elektronik	Power Transformers - Board Mount MID-OLTI UCC28720 1.5 mH 5 W Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	842In Stock	¥709.2 ¥657.8 ¥556.4 ¥506.6 ¥416.9	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
Power Transformers - Board Mount WE-UNIT 4W SMD Offline Trnsfmr 7508170312 Wurth Elektronik 1: ¥825.5 723In Stock	Mfr. Part # 7508170312 Mouser Part # 710-7508170312	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT 4W SMD Offline Trnsfmr Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	723In Stock	Cut Tape ¥825.5 ¥764.1 ¥694.3 Reel ¥573 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
Power Transformers - Board Mount MID-UNIT NXP Offline 2.38mH 1Ohm 750871030 Wurth Elektronik 1: ¥1,061.4 489In Stock 1,050Expected 11/16/2026	Mfr. Part # 750871030 Mouser Part # 710-750871030	Wurth Elektronik	Power Transformers - Board Mount MID-UNIT NXP Offline 2.38mH 1Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	489In Stock 1,050Expected 11/16/2026	¥1,061.4 ¥985 ¥759.1	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
Power Transformers - Board Mount WE-UNIT Offline 220uH .21A .29Ohm 7491181012 Wurth Elektronik 1: ¥1,220.8 273In Stock 132Expected 2/12/2027	Mfr. Part # 7491181012 Mouser Part # 710-7491181012	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 220uH .21A .29Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	273In Stock 132Expected 2/12/2027	¥1,220.8 ¥1,074.7 ¥1,018.2 ¥961.7 View ¥903.6 ¥878.7	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
Power Transformers - Board Mount WE-UNIT Offline 175uH .21A .29Ohm 7491181112 Wurth Elektronik 1: ¥1,220.8 102In Stock	Mfr. Part # 7491181112 Mouser Part # 710-7491181112	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 175uH .21A .29Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	102In Stock	¥1,220.8 ¥1,073 ¥1,016.5 ¥960.1 View ¥903.6 ¥878.7	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
Power Transformers - Board Mount WE-UNIT Offline 112uH .85A 28Ohm 7491182112 Wurth Elektronik 1: ¥1,343.7 6In Stock	Mfr. Part # 7491182112 Mouser Part # 710-7491182112	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 112uH .85A 28Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	6In Stock	¥1,343.7 ¥1,181 ¥1,056.4 ¥993.3 ¥988.3	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
Power Transformers - Board Mount MID-OLTI UCC28910 1.1 mH 6 W 750313739 Wurth Elektronik 1: ¥1,151.1 223In Stock	Mfr. Part # 750313739 Mouser Part # 710-750313739	Wurth Elektronik	Power Transformers - Board Mount MID-OLTI UCC28910 1.1 mH 6 W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	223In Stock	Cut Tape ¥1,151.1 ¥1,061.4 Reel ¥1,061.4 ¥795.6 MouseReel Available	Min.: 1 Mult.: 1 : 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
Power Transformers - Board Mount MID-UNIT STM Offline 1.60mH 6.20Ohm 750370024 Wurth Elektronik 1: ¥968.4 390In Stock 1,040Expected 11/16/2026	Mfr. Part # 750370024 Mouser Part # 710-750370024	Wurth Elektronik	Power Transformers - Board Mount MID-UNIT STM Offline 1.60mH 6.20Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	390In Stock 1,040Expected 11/16/2026	¥968.4 ¥898.6 ¥760.7 ¥691 ¥569.7	Min.: 1 Mult.: 1	Power	85 VAC to 424 VAC	12 V	6 W	500 mA	Through Hole	Single Primary Winding	Single Secondary Winding	13.72 mm	20.45 mm	10.8 mm	MID-OLSTM
Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 12V 7508116312 Wurth Elektronik 1: ¥1,382 128In Stock	Mfr. Part # 7508116312 Mouser Part # 710-7508116312	Wurth Elektronik	Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 12V Learn More about Wurth Elektronik midcom wurth MID OLEFD EFD20 transformers	Datasheet	128In Stock	Cut Tape ¥1,382 ¥1,149.4 Reel ¥1,149.4 ¥812.2 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
Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 24V 750811643 Wurth Elektronik 1: ¥1,375.3 29In Stock 120Expected 11/16/2026	Mfr. Part # 750811643 Mouser Part # 710-750811643	Wurth Elektronik	Power Transformers - Board Mount MID-OLEFD EFD20 SMD .8uH 1.4A 24V Learn More about Wurth Elektronik midcom wurth MID OLEFD EFD20 transformers	Datasheet	29In Stock 120Expected 11/16/2026	Cut Tape ¥1,375.3 ¥1,255.7 ¥1,159.4 Reel ¥1,159.4 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
Power Transformers - Board Mount MID-OLEFD 125-375V 68-100kHz 750811645 Wurth Elektronik 1: ¥1,622.8 67In Stock	Mfr. Part # 750811645 Mouser Part # 710-750811645	Wurth Elektronik	Power Transformers - Board Mount MID-OLEFD 125-375V 68-100kHz Learn More about Wurth Elektronik midcom wurth MID OLEFD EFD20 transformers	Datasheet	67In Stock	¥1,622.8 ¥1,602.9 ¥1,501.5 ¥1,352.1 View ¥1,200.9 Quote	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
Power Transformers - Board Mount MID-OLLT LT3798 600 uH 14 W 750813134 Wurth Elektronik 1: ¥1,308.9 191In Stock	Mfr. Part # 750813134 Mouser Part # 710-750813134	Wurth Elektronik	Power Transformers - Board Mount MID-OLLT LT3798 600 uH 14 W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	191In Stock	¥1,308.9 ¥1,215.9 ¥1,028.2 ¥935.1 ¥770.7	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
Power Transformers - Board Mount MID-OLLT LT3798 600 uH 14 W 750813144 Wurth Elektronik 1: ¥1,074.7 62In Stock 1,000Expected 3/8/2027	Mfr. Part # 750813144 Mouser Part # 710-750813144	Wurth Elektronik	Power Transformers - Board Mount MID-OLLT LT3798 600 uH 14 W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	62In Stock 1,000Expected 3/8/2027	¥1,074.7 ¥968.4 ¥913.6 ¥898.6 View ¥863.7 ¥815.6	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
Power Transformers - Board Mount WE-UNIT 5.8W SMD Offline Trnsfmr 750817015 Wurth Elektronik 1: ¥825.5 34In Stock	Mfr. Part # 750817015 Mouser Part # 710-750817015	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT 5.8W SMD Offline Trnsfmr Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	34In Stock	Cut Tape ¥825.5 ¥764.1 ¥694.3 ¥631.2 Reel ¥631.2 ¥573 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
Power Transformers - Board Mount WE-UOST Univ Offline 1250uH 0.8A 2920mOhm 760871135 Wurth Elektronik 1: ¥1,637.7 178In Stock	Mfr. Part # 760871135 Mouser Part # 710-760871135	Wurth Elektronik	Power Transformers - Board Mount WE-UOST Univ Offline 1250uH 0.8A 2920mOhm Learn More about Wurth Elektronik wurth uost transformers	Datasheet	178In Stock	Cut Tape ¥1,637.7 ¥1,609.5 ¥1,494.9 Reel ¥1,310.5 ¥1,200.9 ¥1,091.3 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
Power Transformers - Board Mount WE-LLCR Size ETD34 600uH 150W 24V 760895441 Wurth Elektronik 1: ¥2,768.9 33In Stock	Mfr. Part # 760895441 Mouser Part # 710-760895441	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR Size ETD34 600uH 150W 24V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	33In Stock	¥2,768.9 ¥2,654.3 ¥2,486.5 ¥2,426.7 View ¥2,215.8 ¥2,214.1 ¥1,988.2	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
Power Transformers - Board Mount WE-LLCR Size ETD39 500uH 200W 12V 760895631 Wurth Elektronik 1: ¥2,973.2 6In Stock 15Expected 2/5/2027	Mfr. Part # 760895631 Mouser Part # 710-760895631	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR Size ETD39 500uH 200W 12V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	6In Stock 15Expected 2/5/2027	¥2,973.2 ¥2,848.6 ¥2,670.9 ¥2,403.5 ¥2,136	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
Power Transformers - Board Mount WE-LLCR Size ETD39 500uH 200W 24V 760895641 Wurth Elektronik 1: ¥2,973.2 30In Stock	Mfr. Part # 760895641 Mouser Part # 710-760895641	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR Size ETD39 500uH 200W 24V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	30In Stock	¥2,973.2 ¥2,770.5 ¥2,670.9 ¥2,403.5 View ¥2,378.6 ¥2,136	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
Power Transformers - Board Mount WE-LLCR NCP1399Size ETD39 5 00uH 200W 48V 760895651 Wurth Elektronik 1: ¥2,973.2 24In Stock	Mfr. Part # 760895651 Mouser Part # 710-760895651	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR NCP1399Size ETD39 5 00uH 200W 48V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	24In Stock	¥2,973.2 ¥2,848.6 ¥2,670.9 ¥2,403.5 ¥2,136	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
Power Transformers - Board Mount WE-LLCR Size ETD44 400uH 250W 24V 760895741 Wurth Elektronik 1: ¥3,587.8 35In Stock 105On Order	Mfr. Part # 760895741 Mouser Part # 710-760895741	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR Size ETD44 400uH 250W 24V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	35In Stock 105On Order On Order Ship Dates Mfr. #: 760895741 Stock: 35 Can Ship Immediately On Order: 45 Expected 11/10/2026 60 Expected 11/27/2026 Factory Lead-Time: 15 Weeks	¥3,587.8 ¥3,438.3 ¥3,222.3 ¥2,900.1 ¥2,469.9	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
Power Transformers - Board Mount WE-LLCR Size ETD44 400uH 250W 48V 760895751 Wurth Elektronik 15: ¥3,343.6 15In Stock	Mfr. Part # 760895751 Mouser Part # 710-760895751	Wurth Elektronik	Power Transformers - Board Mount WE-LLCR Size ETD44 400uH 250W 48V Learn More about Wurth Elektronik wurth llcr transformers	Datasheet	15In Stock	¥3,343.6 ¥3,222.3 ¥2,900.1 ¥2,871.9 ¥2,469.9	Min.: 15 Mult.: 15	Power	255 VAC to 283 VAC	48 V	250 W	5.2 A	Through Hole	Single Primary Winding	Dual Secondary Winding	48 mm	46 mm	27.5 mm	WE-LLCR
Power Transformers - Board Mount MID-OLTI 120V 12V 5W 750310787 Wurth Elektronik 1: ¥1,295.6 44In Stock	Mfr. Part # 750310787 Mouser Part # 710-750310787	Wurth Elektronik	Power Transformers - Board Mount MID-OLTI 120V 12V 5W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	44In Stock	¥1,295.6 ¥1,195.9 ¥822.2	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
Power Transformers - Board Mount MID-OLSTM 85-265V 80kHz 750316878 Wurth Elektronik 1: ¥931.8 3In Stock	Mfr. Part # 750316878 Mouser Part # 710-750316878	Wurth Elektronik	Power Transformers - Board Mount MID-OLSTM 85-265V 80kHz Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	3In Stock	¥931.8 ¥862.1 ¥759.1 ¥689.3	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
Power Transformers - Board Mount MID-OLTI UCC28711 450 uH 750318302 Wurth Elektronik 1: ¥2,423.4 23In Stock	Mfr. Part # 750318302 Mouser Part # 710-750318302	Wurth Elektronik	Power Transformers - Board Mount MID-OLTI UCC28711 450 uH Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	23In Stock	¥2,423.4 ¥2,237.4 ¥2,051.3 ¥1,865.3 View ¥1,536.4 ¥1,352.1	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