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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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PM3602-33-RC	63K3594 Data Sheet + RoHS	Inductor, Power, 33 µH, 20%, 0.14 ohm, 980 mA, 11.48mm x 8.99mm x 5.72mm BOURNS JW MILLER You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.27	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	PM3600 Series	33µH	980mA	-	-	0.14ohm	-	11.48mm	8.99mm	5.72mm	Surface Mount	-55°C	125°C	-
SRF1260-101M	14T0923 Data Sheet + RoHS	Inductor, Power, 100 µH, 20%, 0.171 ohm, 1.78 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	800+ $0.843	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	100µH	1.78A	2.2A	-	0.171ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-
SRF1260-101M	14T0922 Data Sheet + RoHS Date/Lot Code	Inductor, Power, 100 µH, 20%, 0.171 ohm, 1.78 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	1+ $0.533 10+ $0.533 25+ $0.533 50+ $0.533 100+ $0.533 250+ $0.533 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1260 Series	100µH	1.78A	2.2A	-	0.171ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-
744878220	32T8641 Data Sheet + RoHS Date/Lot Code	Inductor, 22 µH, 20%, 0.3 ohm, 700 mA, 7.3mm x 7.3mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $2.91 10+ $2.77 25+ $2.67 50+ $2.59 100+ $2.41 250+ $2.31 500+ $2.23 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	22µH	700mA	1.5A	-	0.3ohm	-	7.3mm	7.3mm	4mm	Surface Mount	-40°C	125°C	-
DRQ127-330-R	29AH4036 + RoHS	INDUCTOR, POWER EATON COILTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $0.592 100+ $0.592 250+ $0.592 500+ $0.592 1000+ $0.592	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	DRQ	33.92µH	3.23A	6.22A	-	0.06ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

CTX8-2-R	52K7494 Data Sheet + RoHS	Inductor, Power, 7.94 µH, 20%, 0.027 ohm, 2.6 A, 8.89mm x 8.89mm x 5.97mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $4.05	Restricted Item Minimum order of 800 items Multiples of 800 only Please enter a valid quantity Add Min: 800 Mult: 800	OCTA-PAC Series	7.94µH	2.6A	-	-	0.027ohm	-	8.89mm	8.89mm	5.97mm	Surface Mount	-40°C	125°C	-

DRQ73-220-R	27K7253 Data Sheet + RoHS	Inductor, Power, 22.65 µH, 20%, 0.107 ohm, 1.62 A, 7.6mm x 7.6mm x 3.55mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $1.36	Restricted Item Minimum order of 1350 items Multiples of 1350 only Please enter a valid quantity Add Min: 1350 Mult: 1350	DRQ Series	22.65µH	1.62A	1.67A	-	0.107ohm	-	7.6mm	7.6mm	3.55mm	Surface Mount	125°C	-40°C	-

DRQ125-220-R	27K7207 Data Sheet + RoHS	Inductor, Power, 22.36 µH, 20%, 0.0396 ohm, 3.7 A, 12.5mm x 12.5mm x 6mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.41	Restricted Item Minimum order of 600 items Multiples of 600 only Please enter a valid quantity Add Min: 600 Mult: 600	DRQ Series	22.36µH	3.7A	4.71A	-	0.0396ohm	-	12.5mm	12.5mm	6mm	Surface Mount	125°C	-40°C	-

MSD1583-683MED	69W2928 Data Sheet + RoHS Date/Lot Code	INDUCTOR, PWR, 68UH, 2.2A,20%,5.7MHZ COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $3.67 10+ $3.32 25+ $3.18 50+ $3.02 100+ $2.72 250+ $2.42 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1583	68µH	1.56A	4.5A	-	0.0825ohm	790nH	14.8mm	14.8mm	8.6mm	Surface Mount	-40°C	85°C	-

SRF1260-820M	14T0957 Data Sheet Data Sheet + RoHS	Inductor, Power, 82 µH, 20%, 0.15 ohm, 2.05 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.15	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	82µH	2.05A	2.39A	-	0.15ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

7448709470	46T8839 Data Sheet + RoHS Date/Lot Code	Inductor, 47 µH, 20%, 0.13 ohm, 1.9 A, 12.5mm x 12.5mm x 10.5mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $3.95 10+ $3.77 25+ $3.65 50+ $3.52 100+ $3.28	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD Series	47µH	1.9A	3.6A	-	0.13ohm	-	12.5mm	12.5mm	10.5mm	Surface Mount	-40°C	125°C	-

SRF1280-1R5Y	14T0966 Data Sheet + RoHS	Inductor, Power, 1.5 µH, 20%, 7600 µohm, 13.5 A, 12.5mm x 12.5mm x 8mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	800+ $1.05	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1280 Series	1.5µH	13.5A	31.1A	-	0.0076ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

PM3602-25-RC	63K3591 Data Sheet + RoHS	Inductor, Power, 25 µH, 20%, 0.098 ohm, 1.17 A, 11.48mm x 8.99mm x 5.72mm BOURNS JW MILLER You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.31	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	PM3600 Series	25µH	1.17A	-	-	0.098ohm	-	11.48mm	8.99mm	5.72mm	Surface Mount	-55°C	125°C	-

SRF1280-221M	14T0981 Data Sheet + RoHS	Inductor, Power, 220 µH, 20%, 0.343 ohm, 1.29 A, 12.5mm x 12.5mm x 8mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.23	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1280 Series	220µH	1.29A	2.43A	-	0.343ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

74489440220	32T8666 Data Sheet + RoHS Date/Lot Code	Inductor, 22 µH, 20%, 0.228 ohm, 1 A, 8mm x 8mm x 3.8mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $2.46 10+ $2.43 25+ $2.40 50+ $2.35 100+ $2.26	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-TDC Series	22µH	1A	1.8A	-	0.228ohm	-	8mm	8mm	3.8mm	Surface Mount	-40°C	125°C	-

74489440068	32T8661 Data Sheet + RoHS Date/Lot Code	INDUCTOR, 6.8UH 30%, 1.45A, TDC8038 WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $2.50 10+ $2.46 25+ $2.41 50+ $2.37 100+ $2.27 500+ $1.82 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	6.8µH	1.45A	3.2A	-	0.1ohm	-	8mm	8mm	3.8mm	Surface Mount	-40°C	125°C	-

SRF1260-102M	14T0924 Data Sheet Data Sheet + RoHS	Inductor, Power, 1 mH, 20%, 1.854 ohm, 570 mA, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.05	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	1mH	570mA	700mA	-	1.854ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

744873100	32T8611 Data Sheet + RoHS Date/Lot Code	Inductor, 10 µH, 20%, 0.036 ohm, 3.81 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) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $3.14 10+ $2.82 25+ $2.63 50+ $2.45 100+ $2.21 500+ $2.03 1000+ $1.83 2500+ $1.73 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	3.81A	7.2A	-	0.036ohm	-	12.5mm	12.5mm	8.5mm	Surface Mount	-40°C	125°C	-

SRF1260-R47Y	14T0914 Data Sheet + RoHS	POWER INDUCTOR, 470 NH, 17.6A, 20% BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.05	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	470nH	17.6A	33A	-	0.0053ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

SRF1260-8R2Y	14T0956 Data Sheet + RoHS	Inductor, Power, 8.2 µH, 20%, 0.0194 ohm, 5.54 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	800+ $0.807	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	8.2µH	5.54A	7.86A	-	0.0194ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

744871100	32T8602 Data Sheet + RoHS Date/Lot Code	Inductor, 10 µH, 20%, 0.05 ohm, 2 A, 12.5mm x 12.5mm x 6.5mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Delivery in 2-4 business days from our UK warehouse for in stock items	1+ $3.60 25+ $3.36 50+ $3.14 100+ $2.97	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	2A	5A	-	0.05ohm	-	12.5mm	12.5mm	6.5mm	Surface Mount	-40°C	125°C	-

SRF1280-102M	14T0971 Data Sheet + RoHS	Inductor, Power, Dual, 1 mH, 1.992 ohm, 610 mA, 12.5mm x 12.5mm x 8mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.25	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1280 Series	1mH	610mA	1.14A	-	1.992ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

SRF1260-681M	14T0953 Data Sheet Data Sheet + RoHS	Inductor, Power, 680 µH, 20%, 1.212 ohm, 700 mA, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.05	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	680µH	700mA	850mA	-	1.212ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

PM3604-10-RC	63K3599 Data Sheet + RoHS	Inductor, Power, 10 µH, 20%, 0.028 ohm, 2.7 A, 13.97mm x 11.48mm x 6.73mm BOURNS JW MILLER You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.34	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	PM3600 Series	10µH	2.7A	-	-	0.028ohm	-	13.97mm	11.48mm	6.73mm	Surface Mount	-55°C	125°C	-

SRF0703-330M	14T0892 Data Sheet + RoHS	Inductor, Power, 33 µH, 20%, 0.24 ohm, 1.31 A, 7.6mm x 7.6mm x 3.4mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $0.705	Restricted Item Minimum order of 1500 items Multiples of 1500 only Please enter a valid quantity Add Min: 1500 Mult: 1500	SRF0703 Series	33µH	1.31A	1.35A	-	0.24ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-