Power Transformers - Board Mount

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WE-UNIT Off-Line Transformers

Würth Elektronik Midcom WE-UNIT Off-Line Transformers are designed for use in AC/DC switch-mode power supplies. These transformers work with a wide input voltage range from 125V_DC to 375V_DC with an isolation voltage of 4_kV. The UNIT series uses the standard bobbins and core sizes EE13 and EE16, which guarantees short lead times. Both the EE13 and EE16 sizes are offered in a vertical and horizontal layout. Typical applications for Würth Elektronik Midcom WE-UNIT Off-Line Transformers include tiny switch ICs and SMPS with universal input from 85V_AC to 265V_AC.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (IDR) 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 WE-UNIT Offline 280uH .2A .05Ohm 749118105 Wurth Elektronik 1: Rp134.660 164In Stock	Mfr. Part No. 749118105 Mouser Part No 710-749118105	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 280uH .2A .05Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	164In Stock	Rp134.660 Rp118.515 Rp112.278 Rp106.040 View Rp99.802 Rp97.050	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	5 V	3 W	600 mA	Through Hole	Single Primary Winding	Single Secondary Winding	15 mm	11 mm	16.8 mm	WE-UNIT
Power Transformers - Board Mount WE-UNIT 5.6W SMD Offline Trnsfmr 7508170311 Wurth Elektronik 1: Rp91.180 880In Stock	Mfr. Part No. 7508170311 Mouser Part No 710-7508170311	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT 5.6W SMD Offline Trnsfmr Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	880In Stock	Cut Tape Rp91.180 Rp84.392 Reel Rp63.294 MouseReel Available	Min.: 1 Mult.: 1 : 175	Power	55 VAC to 265 VAC	12 V	5 W	420 mA	SMD/SMT	Dual Primary Winding	Dual Secondary Winding	13.8 mm	23.9 mm	11 mm	MID-OLEE
Power Transformers - Board Mount WE-UNIT Offline 175uH .85A 26Ohm 749118205 Wurth Elektronik 1: Rp148.419 121In Stock	Mfr. Part No. 749118205 Mouser Part No 710-749118205	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 175uH .85A 26Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	121In Stock	Rp148.419 Rp130.440 Rp123.469 Rp109.709 Rp109.159	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	5 V	9 W	600 mA	Through Hole	Single Primary Winding	Single Secondary Winding	18 mm	16.5 mm	18 mm	WE-UNIT
Power Transformers - Board Mount WE-UNIT Offline 245uH .21A 1.2Ohm 7491181024 Wurth Elektronik 1: Rp134.843 110In Stock	Mfr. Part No. 7491181024 Mouser Part No 710-7491181024	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 245uH .21A 1.2Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	110In Stock	Rp134.843 Rp118.515 Rp112.278 Rp106.040 View Rp99.802 Rp97.050	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	24 V	3 W	125 mA	Through Hole	Single Primary Winding	Single Secondary Winding	15 mm	11 mm	16.8 mm	WE-UNIT
Power Transformers - Board Mount MID-OLLT LT3798 180 uH 108 W 750811351 Wurth Elektronik 1: Rp272.438 141In Stock 1.000Expected 17/12/2026	Mfr. Part No. 750811351 Mouser Part No 710-750811351	Wurth Elektronik	Power Transformers - Board Mount MID-OLLT LT3798 180 uH 108 W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	141In Stock 1.000Expected 17/12/2026	Rp272.438 Rp268.952 Rp252.074 Rp226.940	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	36 V	108 W	3 A	Through Hole	Dual Primary Winding	Triple Secondary Winding	39.6 mm	43.18 mm	30.48 mm	MID-OLLT
Power Transformers - Board Mount MID-OLSTM L6599A 1.396 mH 12 W 760871131 Wurth Elektronik 1: Rp139.063 223In Stock	Mfr. Part No. 760871131 Mouser Part No 710-760871131	Wurth Elektronik	Power Transformers - Board Mount MID-OLSTM L6599A 1.396 mH 12 W Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	223In Stock	Rp139.063 Rp129.156 Rp119.249 Rp109.159 View Rp99.252 Rp82.007 Quote	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
Power Transformers - Board Mount MID-OLLT LT3798 300 uH 48 W 750811248 Wurth Elektronik 1: Rp180.341 4.409In Stock	Mfr. Part No. 750811248 Mouser Part No 710-750811248	Wurth Elektronik	Power Transformers - Board Mount MID-OLLT LT3798 300 uH 48 W Learn More about Wurth Elektronik wurth electronics ac dc converter transformers	Datasheet	4.409In Stock	Rp180.341 Rp178.140 Rp150.254 Rp133.559	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	24 V	48 W	2 A	Through Hole	Dual Primary Winding	Dual Secondary Winding	31 mm	31 mm	25 mm	MID-OLLT
Power Transformers - Board Mount MID-FLYLT LT8300 300 uH 3.6 W 750312365 Wurth Elektronik 1: Rp65.128 677In Stock	Mfr. Part No. 750312365 Mouser Part No 710-750312365	Wurth Elektronik	Power Transformers - Board Mount MID-FLYLT LT8300 300 uH 3.6 W Learn More about Wurth Elektronik wurth electronics dc dc converter transformers	Datasheet	677In Stock	Cut Tape Rp65.128 Rp43.663 Reel Rp43.663 MouseReel Available	Min.: 1 Mult.: 1 : 400	POE - Power Over Ethernet Transformers	30 V to 72 V	12 V	3.6 W	300 mA	SMD/SMT	Dual Primary Winding	Single Secondary Winding	10.16 mm	13.36 mm	8.64 mm	MID-FLYLT
Power Transformers - Board Mount MID-FLYLT LT8300 300 uH 1.7 W 750312367 Wurth Elektronik 1: Rp66.779 714In Stock	Mfr. Part No. 750312367 Mouser Part No 710-750312367	Wurth Elektronik	Power Transformers - Board Mount MID-FLYLT LT8300 300 uH 1.7 W Learn More about Wurth Elektronik wurth electronics dc dc converter transformers	Datasheet	714In Stock	Cut Tape Rp66.779 Rp62.743 Rp56.506 Reel Rp50.635 Rp43.663 MouseReel Available	Min.: 1 Mult.: 1 : 400	Flyback Transformers	22 V to 72 V	3.3 V	1.7 W	500 mA	SMD/SMT	Dual Primary Winding	Single Secondary Winding	10.16 mm	13.36 mm	8.64 mm	MID-FLYLT
Power Transformers - Board Mount MID-OLTI UCC28720 1.5 mH 5 W 7508110151 Wurth Elektronik 1: Rp78.337 842In Stock	Mfr. Part No. 7508110151 Mouser Part No 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	Rp78.337 Rp72.650 Rp61.459 Rp55.955 Rp46.048	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 MID-OLPI UCC28700 1.67 mH 6 W 750811016 Wurth Elektronik 1: Rp132.458 827In Stock 1.080Expected 10/12/2026	Mfr. Part No. 750811016 Mouser Part No 710-750811016	Wurth Elektronik	Power Transformers - Board Mount MID-OLPI UCC28700 1.67 mH 6 W Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	827In Stock 1.080Expected 10/12/2026	Rp132.458 Rp113.562 Rp94.482 Rp80.906	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
Power Transformers - Board Mount WE-UNIT Offline 175uH .21A .29Ohm 7491181112 Wurth Elektronik 1: Rp134.843 104In Stock	Mfr. Part No. 7491181112 Mouser Part No 710-7491181112	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 175uH .21A .29Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	104In Stock	Rp134.843 Rp118.515 Rp112.278 Rp106.040 View Rp99.802 Rp97.050	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: Rp148.419 6In Stock	Mfr. Part No. 7491182112 Mouser Part No 710-7491182112	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 112uH .85A 28Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	6In Stock	Rp148.419 Rp130.440 Rp116.681 Rp109.709 Rp109.159	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-FLYLT LT8300 400 uH 1.5 W 750312366 Wurth Elektronik 1: Rp52.286 59In Stock 3.600On Order	Mfr. Part No. 750312366 Mouser Part No 710-750312366	Wurth Elektronik	Power Transformers - Board Mount MID-FLYLT LT8300 400 uH 1.5 W Learn More about Wurth Elektronik wurth electronics dc dc converter transformers	Datasheet	59In Stock 3.600On Order On Order Ship Dates Mfr. No: 750312366 Stock: 59 Can Dispatch Immediately On Order: 1.200 Expected 26/11/2026 2.400 Expected 31/12/2026 Factory Lead Time: 14 Weeks	Cut Tape Rp52.286 Rp48.433 Rp41.095 Reel Rp37.242 Rp30.821 Quote Quote MouseReel Available	Min.: 1 Mult.: 1 : 400	Flyback Transformers	18 V to 75 V	5 V	1.5 W	300 mA	SMD/SMT	Dual Primary Winding	Single Secondary Winding	10.16 mm	13.36 mm	8.64 mm	MID-FLYLT
Power Transformers - Board Mount MID-UNIT STM Offline 1.60mH 6.20Ohm 750370024 Wurth Elektronik 1: Rp106.957 394In Stock 1.040Expected 19/11/2026	Mfr. Part No. 750370024 Mouser Part No 710-750370024	Wurth Elektronik	Power Transformers - Board Mount MID-UNIT STM Offline 1.60mH 6.20Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	394In Stock 1.040Expected 19/11/2026	Rp106.957 Rp99.252 Rp84.025 Rp76.319 Rp62.927	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 WE-UNIT 5.8W SMD Offline Trnsfmr 750817015 Wurth Elektronik 1: Rp91.180 34In Stock	Mfr. Part No. 750817015 Mouser Part No 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 Rp91.180 Rp84.392 Rp76.686 Rp69.715 Reel Rp69.715 Rp63.294 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-UNIT 4W SMD Offline Trnsfmr 7508170312 Wurth Elektronik 1: Rp91.180 23In Stock 700Expected 12/10/2026	Mfr. Part No. 7508170312 Mouser Part No 710-7508170312	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT 4W SMD Offline Trnsfmr Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	23In Stock 700Expected 12/10/2026	Cut Tape Rp91.180 Rp84.392 Rp76.686 Reel Rp63.294 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 WE-UNIT 4.6W SMD Offline Trnsfmr 750817014 Wurth Elektronik 1: Rp91.180 164In Stock	Mfr. Part No. 750817014 Mouser Part No 710-750817014	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT 4.6W SMD Offline Trnsfmr Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	164In Stock	Cut Tape Rp91.180 Rp84.392 Rp76.686 Rp69.715 Reel Rp69.715 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
Power Transformers - Board Mount WE-UNIT Offline 220uH .21A .29Ohm 7491181012 Wurth Elektronik 1: Rp141.998 555Expected 23/10/2026	Mfr. Part No. 7491181012 Mouser Part No 710-7491181012	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 220uH .21A .29Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	555Expected 23/10/2026	Rp141.998 Rp124.936 Rp118.332 Rp111.727 View Rp105.306 Rp98.701	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 180uH .2A .05Ohm 749118115 Wurth Elektronik 1: Rp141.998 359Expected 16/10/2026	Mfr. Part No. 749118115 Mouser Part No 710-749118115	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 180uH .2A .05Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	359Expected 16/10/2026	Rp141.998 Rp124.936 Rp118.332 Rp111.727 View Rp105.306 Rp98.701	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
Power Transformers - Board Mount MID-UNIT NXP Offline 2.38mH 1Ohm 750871030 Wurth Elektronik 1: Rp117.231 2.100On Order	Mfr. Part No. 750871030 Mouser Part No 710-750871030	Wurth Elektronik	Power Transformers - Board Mount MID-UNIT NXP Offline 2.38mH 1Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	2.100On Order On Order Ship Dates Mfr. No: 750871030 Stock: 0 On Order: 1.050 Expected 12/10/2026 1.050 Expected 19/11/2026 Factory Lead Time: 22 Weeks	Rp117.231 Rp108.792 Rp83.841	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 172uH .21A 1.2Ohm 7491181124 Wurth Elektronik 180: Rp111.727 Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 7491181124 Mouser Part No 710-7491181124	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 172uH .21A 1.2Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	Non-Stocked Lead-Time 21 Weeks	Rp111.727 Rp105.306 Rp98.701	Min.: 180 Mult.: 180	Power	85 VAC to 265 VAC	24 V	3 W	125 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 145uH .85A 26Ohm 7491182012 Wurth Elektronik 154: Rp122.918 Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 7491182012 Mouser Part No 710-7491182012	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 145uH .85A 26Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	Non-Stocked Lead-Time 21 Weeks	Rp122.918 Rp115.763 Rp108.792 Quote Quote	Min.: 154 Mult.: 154	Power	85 VAC to 265 VAC	12 V	8.4 W	250 mA	Through Hole	Single Primary Winding	Dual Secondary Winding	18 mm	16.5 mm	18 mm	WE-UNIT
Power Transformers - Board Mount WE-UNIT Offline 145uH 4.5A 210Ohm 7491182024 Wurth Elektronik 154: Rp122.918 Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 7491182024 Mouser Part No 710-7491182024	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 145uH 4.5A 210Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	Non-Stocked Lead-Time 21 Weeks	Rp122.918 Rp115.763 Rp108.792 Quote Quote	Min.: 154 Mult.: 154	Power	85 VAC to 265 VAC	24 V	9.6 W	125 mA	Through Hole	Single Primary Winding	Single Secondary Winding	18 mm	16.5 mm	18 mm	WE-UNIT
Power Transformers - Board Mount WE-UNIT Offline 100uH .8A 94Ohm 7491182124 Wurth Elektronik 1: Rp156.308 Non-Stocked Lead-Time 21 Weeks	Mfr. Part No. 7491182124 Mouser Part No 710-7491182124	Wurth Elektronik	Power Transformers - Board Mount WE-UNIT Offline 100uH .8A 94Ohm Learn More about Wurth Elektronik wurthWEUNITTransformer	Datasheet	Non-Stocked Lead-Time 21 Weeks	Rp156.308 Rp137.412 Rp130.257 Rp122.918 View Rp115.763 Rp108.792 Quote	Min.: 1 Mult.: 1	Power	85 VAC to 265 VAC	24 V	9.6 W	125 mA	Through Hole	Single Primary Winding	Single Secondary Winding	24.5 mm	20.2 mm	16.5 mm	WE-UNIT