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Our wide range of coupled inductors has a choice of inductance values from 50nH to 2mH – and RMS current ratings from 100mA to 38A.

Current flowing through a conductor generates a magnetic flux field. If the current varies over time, then so will the flux - and a current will flow in a second conductor if it is permeated by such a time varying magnetic field. This effect is known as inductance.

Coupled inductors comprise two coils of wire wrapped around a magnetic core. A varying magnetic field generated by current in the first coil will induce a current in the opposite direction in the second coil. The voltage across the second coil depends on the rate of change of current in the first, and the mutual inductance of the system.

Applications for coupled inductors

Purpose-designed coupled inductors are used in a variety of power conversion circuits such as flyback, SEPIC, Fly-Buck™, Cuk, ZETA and multi-phase topologies. These voltage regulation circuits use coupled inductors to efficiently provide the required output voltages, which may be stepped up or down from the input. To do this, SEPIC and Zeta circuits use 1:1 coupled inductors, whereas flyback and other circuits use 1:N inductors. In multi-phase power converters, coupled inductors provide inherent ripple current cancelling that is not provided by single inductors.

You can connect coupled inductor windings in different configurations to serve different purposes. The windings may be connected to circuits separately for use as isolation transformers or as common mode chokes. You may also connect them in series to achieve a higher inductance or for use as a tapped inductor.

How do I choose a coupled inductor?

Selection of a coupled inductor is application dependent. Coilcraft, for example, publishes datasheets that characterize coupled inductors for multiple circuit uses, and the company has developed online tools for selecting coupled inductors. Their MAGPro™ Coupled Inductor Finder is a powerful search and analysis tool that finds off-the-shelf coupled inductors for SEPIC and Zeta converters and many other applications.

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Manufacturer Part No	Newark Part No.	Description / Manufacturer	Price for:	Price	Quantity	Product Range	Inductance, Parallel	RMS Current, Parallel	Saturation Current, Parallel	Coupled Inductor Case	DC Resistance Max, Parallel	Leakage Inductance	Product Length	Product Width	Product Height	Inductor Mounting	Operating Temperature Min	Operating Temperature Max	Qualification
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744878008	75AJ2806 + RoHS Date/Lot Code	COUPLED INDUCTOR, 8.2UH, 1.3A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.75 10+ $3.60 25+ $3.34 50+ $3.02 100+ $2.75 250+ $2.41 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	8.2µH	1.3A	2.7A	-	0.14ohm	-	7.3mm	7.3mm	4mm	Surface Mount	-40°C	125°C	-
74488540250	48W3895 Data Sheet Data Sheet + RoHS	Inductor, 25 µH, 20%, 0.24 ohm, 1.5 A, 6mm x 6mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ $6.44 10+ $6.30 25+ $6.17 50+ $6.04 100+ $5.57 500+ $5.18 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-EHPI Series	25µH	1.5A	700mA	-	0.24ohm	-	6mm	6mm	4mm	Surface Mount	-40°C	125°C	-
74488540070	48W3893 Data Sheet Data Sheet + RoHS	Inductor, 7.5 µH, 20%, 0.095 ohm, 1.9 A, 6mm x 6mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ $7.23 10+ $6.97 25+ $6.84 50+ $6.70 100+ $6.14 500+ $5.74 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-EHPI Series	7.5µH	1.9A	1.3A	-	0.095ohm	-	6mm	6mm	4mm	Surface Mount	-40°C	125°C	-
74485542680	75AJ2788 + RoHS Date/Lot Code	COUPLED INDUCTOR, 6.8UH, 13.5A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $20.02 10+ $18.55 25+ $17.29 50+ $16.07 100+ $14.80 250+ $13.94 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	6.8µH	13.5A	26A	-	0.0061ohm	-	18.5mm	18.5mm	13.5mm	Surface Mount	-40°C	150°C	-
74489440036	75AJ2808 + RoHS Date/Lot Code	COUPLED INDUCTOR, 3.6UH, 2.3A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.98 10+ $3.82 25+ $3.55 50+ $3.22 100+ $2.92 250+ $2.58 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-TDC	3.6µH	2.3A	4.6A	-	0.053ohm	-	8mm	8mm	3.8mm	Surface Mount	-40°C	125°C	-

744877006	75AJ2803 + RoHS Date/Lot Code	COUPLED INDUCTOR, 6.8UH, 1.8A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.85 10+ $3.71 25+ $3.44 50+ $3.11 100+ $2.82 250+ $2.49 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	6.8µH	1.8A	3.2A	-	0.102ohm	-	7.3mm	7.3mm	4.8mm	Surface Mount	-40°C	125°C	-

744877005	75AJ2802 + RoHS Date/Lot Code	COUPLED INDUCTOR, 5.6UH, 1.9A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.85 10+ $3.71 25+ $3.44 50+ $3.11 100+ $2.82 250+ $2.49 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	5.6µH	1.9A	3.5A	-	0.095ohm	-	7.3mm	7.3mm	4.8mm	Surface Mount	-40°C	125°C	-

74485542820	75AJ2789 + RoHS Date/Lot Code	COUPLED INDUCTOR, 8.2UH, 13A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $20.02 10+ $18.55 25+ $17.29 50+ $16.07 100+ $14.80 250+ $13.94 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	8.2µH	13A	24A	-	0.0084ohm	-	18.5mm	18.5mm	13.5mm	Surface Mount	-40°C	150°C	-

74489440027	75AJ2807 + RoHS Date/Lot Code	COUPLED INDUCTOR, 2.7UH, 2.5A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.98 10+ $3.82 25+ $3.55 50+ $3.22 100+ $2.92 250+ $2.58 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-TDC	2.7µH	2.5A	5.1A	-	0.04ohm	-	8mm	8mm	3.8mm	Surface Mount	-40°C	125°C	-

744878005	75AJ2805 + RoHS Date/Lot Code	COUPLED INDUCTOR, 5.6UH, 1.5A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $3.75 10+ $3.60 25+ $3.34 50+ $3.02 100+ $2.75 250+ $2.41 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	5.6µH	1.5A	3A	-	0.12ohm	-	7.3mm	7.3mm	4mm	Surface Mount	-40°C	125°C	-

74485542101	75AJ2787 + RoHS Date/Lot Code	COUPLED INDUCTOR, 10UH, 11.5A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $20.02 10+ $18.55 25+ $17.29 50+ $16.07 100+ $14.80 250+ $13.94 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	10µH	11.5A	22A	-	0.011ohm	-	18.5mm	18.5mm	13.5mm	Surface Mount	-40°C	150°C	-

74485540680	75AJ2785 + RoHS Date/Lot Code	COUPLED INDUCTOR, 6.8UH, 14A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $11.44 10+ $10.79 25+ $10.21 50+ $9.41 100+ $8.59 250+ $7.56 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	6.8µH	14A	16A	-	0.0113ohm	-	13.2mm	13.2mm	12.5mm	Surface Mount	-40°C	150°C	-

744874470	75AJ2801 + RoHS Date/Lot Code	COUPLED INDUCTOR, 47UH, 1.8A ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $4.33 10+ $4.15 25+ $3.84 50+ $3.50 100+ $3.17 250+ $2.79 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	47µH	1.8A	2.75A	-	0.15ohm	-	12.5mm	12.5mm	6.5mm	Surface Mount	-40°C	125°C	-

SRF0703-150M	23T1232 Data Sheet + RoHS	INDUCTOR, DUAL, 15UH PARA., POWER BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $1.66 10+ $1.58 25+ $1.45 50+ $1.31 100+ $1.20 250+ $1.02 500+ $0.916 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF0703	15µH	1.83A	2.05A	-	0.119ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

SRF1280-4R7Y	92AH6052 + RoHS	DUAL-WINDING POWER INDUCTOR, 4.7UH/8.25A ROHS COMPLIANT: YES BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $2.69 100+ $2.22 250+ $2.02 500+ $1.88 1000+ $1.75	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1280	4.7µH	8.25A	16.5A	-	0.0135ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

74485540101	81AH9713 Data Sheet + RoHS Date/Lot Code	COUPLED INDUCTOR, 10UH, 13A, 0.0139 OHM ROHS COMPLIANT: YES WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $9.05 10+ $8.38 25+ $8.06 50+ $7.73 100+ $7.07	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	10µH	13A	13.5A	-	0.0139ohm	-	15.5mm	13.2mm	12.5mm	Surface Mount	-40°C	150°C	-

7448991047	28AH8233 + RoHS Date/Lot Code	COUPLED INDUCTOR, 4.7UH, 6.2A WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ $5.31 10+ $4.77 25+ $4.45 50+ $4.17 100+ $3.85 500+ $3.77 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-MCRI	4.7µH	6.2A	13.8A	-	0.029ohm	225nH	11mm	10mm	4mm	Surface Mount	-40°C	125°C	-

744870100	32T8593 Data Sheet Data Sheet + RoHS	Inductor, 10 µH, 20%, 0.038 ohm, 2.7 A, 12.5mm x 12.5mm x 8.5mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $4.98 10+ $4.73 25+ $4.58 50+ $4.43 100+ $4.13 250+ $3.81 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD Series	10µH	2.7A	7A	-	0.038ohm	-	12.5mm	12.5mm	8.5mm	Surface Mount	-40°C	125°C	-

IHCL4040DZER100M5A	68X2839 Data Sheet Data Sheet + RoHS	INDUCTOR, 10UH, 20%, 4.2A, COUPLED VISHAY You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $4.27 10+ $3.94 25+ $3.54 50+ $3.12 100+ $2.71 250+ $2.32 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	IHCL-4040DZ-5A	10µH	4.2A	9A	-	0.092ohm	-	10.67mm	10.16mm	4mm	Surface Mount	-55°C	155°C	AEC-Q200

CTX150-4A-R	54K4303 Data Sheet + RoHS	POWER INDUCTOR, 150UH, 1.1A, 25%, FULL REEL EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	1+ $5.81 2000+ $5.53 4000+ $5.17 8000+ $4.81 12000+ $4.63 20000+ $4.55 More Pricing...	Restricted Item Minimum order of 600 items Multiples of 600 only Please enter a valid quantity Add Min: 600 Mult: 600	OCTA-PAC PLUS CTX 4A Series	153.5µH	1.1A	1.07A	-	0.365ohm	-	11.43mm	11.43mm	6.35mm	Surface Mount	-40°C	125°C	-

VPH4-0140-R	28K5787 Data Sheet + RoHS	Inductor, 23.7 µH, 20%, 0.0828 ohm, 1.41 A, 18mm x 18mm x 10mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each	25+ $14.49 50+ $12.67 100+ $11.84 250+ $11.42 500+ $10.59	Restricted Item Minimum order of 42 items Multiples of 42 only Please enter a valid quantity Add Min: 42 Mult: 42	VERSA-PAC Series	23.7µH	1.41A	650mA	-	0.0828ohm	156nH	18mm	18mm	10mm	Surface Mount	-40°C	125°C	-

SDQ25-100-R	52K7828 Data Sheet + RoHS Date/Lot Code	Inductor, Power, 9.8 µH, 20%, 0.1068 ohm, 1.53 A, 5.2mm x 5.2mm x 2.5mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $6.97 25+ $6.53 50+ $6.14 100+ $5.64 250+ $5.10 500+ $4.43 1000+ $3.51 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SDQ25 Series	9.8µH	1.53A	1.29A	-	0.1068ohm	-	5.2mm	5.2mm	2.5mm	Surface Mount	-40°C	125°C	-

SRF0703-6R8M	14T0902 Data Sheet + RoHS	POWER INDUCTOR, 6.8UH, 2.55A, 20% BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $0.953	Restricted Item Minimum order of 1500 items Multiples of 1500 only Please enter a valid quantity Add Min: 1500 Mult: 1500	SRF0703 Series	6.8µH	2.55A	3.12A	-	0.0658ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

SRF1260-4R7Y	14T0943 Data Sheet + RoHS	POWER INDUCTOR, 4.7UH, 7.18A, 20% BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.38	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	4.7µH	7.18A	9.71A	-	0.0137ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

7448709100	46T8836 Data Sheet + RoHS	Inductor, 10 µH, 20%, 0.04 ohm, 3.2 A, 12.5mm x 12.5mm x 10.5mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $5.71 10+ $5.46 25+ $5.27 50+ $5.10 100+ $4.75	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD Series	10µH	3.2A	8A	-	0.04ohm	-	12.5mm	12.5mm	10.5mm	Surface Mount	-40°C	125°C	-