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21 mm Transformers

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (USD) Filter the results in the table by unit price based on your quantity.	Qty.	Power Rating	Primary Voltage Rating	Secondary Voltage Rating	Mounting Style
Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 5.0 V 6 A POE300F-50LD Coilcraft 1: $7.47 570In Stock	Mfr. Part No. POE300F-50LD Mouser Part No 994-POE300F-50LD	Coilcraft	Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 5.0 V 6 A Learn More about Coilcraft poe300f flyback transformers	Datasheet	570In Stock	Cut Tape $7.47 $5.80 $5.56 $5.40 Reel $5.01 View $5.22 $4.85 $4.70 MouseReel Available	Min.: 1 Mult.: 1 : 175
Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 24 V 1.25 A POE300F-24LD Coilcraft 1: $7.47 419In Stock	Mfr. Part No. POE300F-24LD Mouser Part No 994-POE300F-24LD	Coilcraft	Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 24 V 1.25 A Learn More about Coilcraft poe300f flyback transformers	Datasheet	419In Stock	Cut Tape $7.47 $5.90 Reel $5.01 $4.85 $4.70 MouseReel Available	Min.: 1 Mult.: 1 : 175
Audio Transformers / Signal Transformers NA5730 SMT Flyback For TI TPS23751/2 NA5730-ALD Coilcraft 1: $6.97 51In Stock	Mfr. Part No. NA5730-ALD Mouser Part No 994-NA5730-ALD	Coilcraft	Audio Transformers / Signal Transformers NA5730 SMT Flyback For TI TPS23751/2 Learn More about Coilcraft power magnetics	Datasheet	51In Stock	Cut Tape $6.97 $5.40 $5.19 $5.04 Reel $4.68 View $4.87 $4.52 $4.38 MouseReel Available	Min.: 1 Mult.: 1 : 175
Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 19.5 V 1.5 A POE300F-19LD Coilcraft 1: $7.47 144In Stock	Mfr. Part No. POE300F-19LD Mouser Part No 994-POE300F-19LD	Coilcraft	Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 19.5 V 1.5 A Learn More about Coilcraft poe300f flyback transformers	Datasheet	144In Stock	Cut Tape $7.47 $5.80 $5.56 $5.40 Reel $5.01 View $5.22 $4.85 $4.70 MouseReel Available	Min.: 1 Mult.: 1 : 175
Power Transformers - Board Mount WE-FLEX W/Air Gap 9.9uH 1.17A 749196510 Wurth Elektronik 1: $10.33 159In Stock	Mfr. Part No. 749196510 Mouser Part No 710-749196510	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 9.9uH 1.17A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	159In Stock	Cut Tape $10.33 $10.25 $9.71 Reel $8.73 $7.98	Min.: 1 Mult.: 1 : 120	500 VA			SMD/SMT
Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 5V PLN060-ER20A05S Bourns 1: $8.68 1,169In Stock	Mfr. Part No. PLN060-ER20A05S Mouser Part No 652-PLN060-ER20A05S	Bourns	Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 5V Learn More about Bourns pln0x er20 planar transformers	Datasheet	1,169In Stock	Cut Tape $8.68 $7.70 $7.40 $7.16 View Reel $6.14 $6.83 $6.66 $6.29 $6.14 MouseReel Available	Min.: 1 Mult.: 1 : 800	60 W	36 V to 72 V	5 V	SMD/SMT
Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 12 V 2.5 A POE300F-12LD Coilcraft 1: $7.47 707In Stock	Mfr. Part No. POE300F-12LD Mouser Part No 994-POE300F-12LD	Coilcraft	Audio Transformers / Signal Transformers POE300F Flyback PoE+ 30uH 12 V 2.5 A Learn More about Coilcraft poe300f flyback transformers	Datasheet	707In Stock	Cut Tape $7.47 $5.80 $5.56 $5.40 Reel $5.01 View $5.22 $4.85 $4.70 MouseReel Available	Min.: 1 Mult.: 1 : 175
Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 12V PLN071-ER20A12S Bourns 1: $9.01 129In Stock	Mfr. Part No. PLN071-ER20A12S Mouser Part No 652-PLN071-ER20A12S	Bourns	Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 12V Learn More about Bourns pln0x er20 planar transformers	Datasheet	129In Stock	Cut Tape $9.01 $7.98 $7.65 $6.73 Reel $6.72 Quote Quote MouseReel Available	Min.: 1 Mult.: 1 : 800	71 W	36 V to 72 V	12 V	SMD/SMT
Power Transformers - Board Mount WE-FLEX W/Air Gap 3.4uH 4.18A 749196540 Wurth Elektronik 1: $9.50 323In Stock	Mfr. Part No. 749196540 Mouser Part No 710-749196540	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 3.4uH 4.18A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	323In Stock	Cut Tape $9.50 $7.21 $6.45 Reel $5.26	Min.: 1 Mult.: 1 : 120	500 VA			SMD/SMT
Power Transformers - Board Mount WE-FLEX W/Air Gap 9.7uH 2.20A 749196531 Wurth Elektronik 1: $9.50 69In Stock	Mfr. Part No. 749196531 Mouser Part No 710-749196531	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 9.7uH 2.20A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	69In Stock	Cut Tape $9.50 $9.02 Reel $8.55	Min.: 1 Mult.: 1 : 120	500 VA			SMD/SMT
Power Transformers - Board Mount WE-FLEX W/Air Gap 12.0uH 1.73A 749196521 Wurth Elektronik 1: $10.33 239Expected 2026/10/02	Mfr. Part No. 749196521 Mouser Part No 710-749196521	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 12.0uH 1.73A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	239Expected 2026/10/02	Cut Tape $10.33 $10.26 $9.72 Reel $9.20 $8.41	Min.: 1 Mult.: 1 : 120	500 VA			SMD/SMT
Audio Transformers / Signal Transformers A9967 Flybck Trnsfmr For Linear LT1725 A9967-ALD Coilcraft 1: $6.05 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. A9967-ALD Mouser Part No 994-A9967-ALD	Coilcraft	Audio Transformers / Signal Transformers A9967 Flybck Trnsfmr For Linear LT1725 Learn More about Coilcraft power magnetics	Datasheet	Non-Stocked Lead-Time 7 Weeks	Cut Tape $6.05 $4.57 $4.35 $4.08 Reel $3.73 View $3.90 $3.62 $3.50 MouseReel Available	Min.: 1 Mult.: 1 : 175
Audio Transformers / Signal Transformers C1023 Flybck Trnsfmr For TI LM5070 C1023-ALD Coilcraft 175: $4.93 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. C1023-ALD Mouser Part No 994-C1023-ALD	Coilcraft	Audio Transformers / Signal Transformers C1023 Flybck Trnsfmr For TI LM5070 Learn More about Coilcraft power magnetics	Datasheet	Non-Stocked Lead-Time 7 Weeks	Reel $4.93 $4.78 $4.63	Min.: 175 Mult.: 175 : 175	13 W
Audio Transformers / Signal Transformers FA2898 Flyback 50uH 2.9A 10% TOL FA2898-ALD Coilcraft 175: $5.40 Non-Stocked Lead-Time 10 Weeks	Mfr. Part No. FA2898-ALD Mouser Part No 994-FA2898-ALD	Coilcraft	Audio Transformers / Signal Transformers FA2898 Flyback 50uH 2.9A 10% TOL Learn More about Coilcraft power magnetics	Datasheet	Non-Stocked Lead-Time 10 Weeks	Reel $5.40 $5.23 $5.06	Min.: 175 Mult.: 175 : 175
Audio Transformers / Signal Transformers JA4456 Flyback For TI TPS23752 JA4456-DLD Coilcraft 1: $7.65 Non-Stocked Lead-Time 7 Weeks	Mfr. Part No. JA4456-DLD Mouser Part No 994-JA4456-DLD	Coilcraft	Audio Transformers / Signal Transformers JA4456 Flyback For TI TPS23752 Learn More about Coilcraft power magnetics	Datasheet	Non-Stocked Lead-Time 7 Weeks	Cut Tape $7.65 $6.34 $6.08 $5.90 Reel $5.47 View $5.71 $5.30 $5.14 MouseReel Available	Min.: 1 Mult.: 1 : 175
Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 3.3V PLN060-ER20A03S Bourns 5,600: $5.85 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN060-ER20A03S Mouser Part No 652-PLN060-ER20A03S	Bourns	Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 3.3V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $5.85	Min.: 5,600 Mult.: 800 : 800	60 W	36 V to 72 V	3.3 V	SMD/SMT
Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 12V PLN060-ER20A12S Bourns 5,600: $5.85 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN060-ER20A12S Mouser Part No 652-PLN060-ER20A12S	Bourns	Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 12V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $5.85	Min.: 5,600 Mult.: 800 : 800	60 W	36 V to 72 V	12 V	SMD/SMT
Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 24V PLN060-ER20A24S Bourns 5,600: $5.85 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN060-ER20A24S Mouser Part No 652-PLN060-ER20A24S	Bourns	Power Transformers - Board Mount Planar transformer, 60W, ER20, Vout 24V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $5.85	Min.: 5,600 Mult.: 800 : 800	60 W	36 V to 72 V	24 V	SMD/SMT
Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 3.3V PLN071-ER20A03S Bourns 5,600: $6.14 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN071-ER20A03S Mouser Part No 652-PLN071-ER20A03S	Bourns	Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 3.3V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $6.14	Min.: 5,600 Mult.: 800 : 800	71 W	36 V to 72 V	3.3 V	SMD/SMT
Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 5V PLN071-ER20A05S Bourns 5,600: $6.14 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN071-ER20A05S Mouser Part No 652-PLN071-ER20A05S	Bourns	Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 5V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $6.14	Min.: 5,600 Mult.: 800 : 800	71 W	36 V to 72 V	5 V	SMD/SMT
Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 24V PLN071-ER20A24S Bourns 5,600: $6.14 Non-Stocked Lead-Time 20 Weeks	Mfr. Part No. PLN071-ER20A24S Mouser Part No 652-PLN071-ER20A24S	Bourns	Power Transformers - Board Mount Planar transformer, 71W, ER20, Vout 24V Learn More about Bourns pln0x er20 planar transformers	Datasheet	Non-Stocked Lead-Time 20 Weeks	Cut Tape $6.14	Min.: 5,600 Mult.: 800 : 800	71 W	36 V to 72 V	24 V	SMD/SMT
Current Transformers - Industrial .20-22A Current Tran sformer K8AC-CT20S Omron Automation and Safety 1: $72.98 Non-Stocked	Mfr. Part No. K8AC-CT20S Mouser Part No 653-K8AC-CT20S	Omron Automation and Safety	Current Transformers - Industrial .20-22A Current Tran sformer	Datasheet	Non-Stocked	$72.98 $65.58 $62.84 $60.84 View $58.91 Quote	Min.: 1 Mult.: 1				Panel
Power Transformers - Board Mount WE-FLEX W/Air Gap 5.3uH 2.53A 749196520 Wurth Elektronik 1: $9.50 Non-Stocked Lead-Time 19 Weeks	Mfr. Part No. 749196520 Mouser Part No 710-749196520	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 5.3uH 2.53A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	Non-Stocked Lead-Time 19 Weeks	Cut Tape $9.50 $8.12 Reel $7.90	Min.: 1 Mult.: 1 : 120				SMD/SMT
Power Transformers - Board Mount WE-FLEX W/Air Gap 4.3uH 2.91A 749196530 Wurth Elektronik 120: $8.55 Non-Stocked Lead-Time 19 Weeks	Mfr. Part No. 749196530 Mouser Part No 710-749196530	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 4.3uH 2.91A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	Non-Stocked Lead-Time 19 Weeks	Reel $8.55	Min.: 120 Mult.: 120 : 120	500 VA			SMD/SMT
Power Transformers - Board Mount WE-FLEX W/Air Gap 7.6uH 2.46A 749196541 Wurth Elektronik 1: $10.33 Non-Stocked Lead-Time 19 Weeks	Mfr. Part No. 749196541 Mouser Part No 710-749196541	Wurth Elektronik	Power Transformers - Board Mount WE-FLEX W/Air Gap 7.6uH 2.46A Learn More about Wurth Elektronik wurthWEFLEXTransformer	Datasheet	Non-Stocked Lead-Time 19 Weeks	Cut Tape $10.33 $10.26 $9.72 Reel $9.20 $8.41	Min.: 1 Mult.: 1 : 120	1.5 kVA			SMD/SMT

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