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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	Order Code	Description / Manufacturer	Price For	Price	Quantity	Product Range	Inductance, Parallel	RMS Current, Parallel	Saturation Current, Parallel	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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SRF1260A-1R5Y	2374058 Data Sheet + RoHS	Inductor, Power, Dual, 1.5 µH, 7.3 µohm, 13.8 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2374058 2374058RL in Re-reel	1+ HK$12.75 10+ HK$11.80 25+ HK$9.83 50+ HK$9.24 100+ HK$8.26	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1260A	1.5µH	13.8A	18.3A	7.3µohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	125°C	AEC-Q200
LPD5030-104MRC	2434747 Data Sheet + RoHS	Inductor, Coupled, 100 µH, 20%, 0.895 ohm, 330 mA, 4.8mm x 4.8mm x 2.9mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2434747 2434747RL in Re-reel	1+ HK$16.86 250+ HK$11.84 500+ HK$8.31 750+ HK$7.69	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5030	100µH	330mA	470mA	0.895ohm	370nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	AEC-Q200
744870220	1869686 Data Sheet + RoHS	Inductor, DD 1280, 22 µH, 20%, 0.08 ohm, 2.45 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) Cut Tape Packaging Options Suggested replacement for:1869686 1869686RL in Re-reel	1+ HK$24.52 10+ HK$23.29 50+ HK$21.65 100+ HK$20.01 250+ HK$18.29	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	22µH	2.45A	5.2A	0.08ohm	-	12.5mm	12.5mm	8.5mm	Surface Mount	-40°C	125°C	-
7448991068	3221547 Data Sheet + RoHS	COUPLED INDUCTOR, 6.8UH, 5A WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ HK$30.17 10+ HK$26.88 25+ HK$26.06 50+ HK$23.10 100+ HK$21.21 500+ HK$19.24 800+ HK$18.99 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	6.8µH	5A	12A	0.044ohm	240nH	11mm	10mm	4mm	Surface Mount	-40°C	125°C	-
DRQ127-330-R	1612156 Data Sheet + RoHS	Inductor, Power, 33.92 µH, 0.06 ohm, 3.23 A, 12.5mm x 12.5mm x 8mm EATON COILTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1612156 1612156RL in Re-reel	1+ HK$20.14 10+ HK$18.43 25+ HK$15.75 50+ HK$14.07 100+ HK$12.06	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	-

7448990150	2842135 Data Sheet + RoHS	Inductor, Coupled, Molded, 15 µH, 0.087 ohm, 3.9 A, 11.5mm x 10mm x 9mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ HK$37.82 10+ HK$33.46 25+ HK$32.72 50+ HK$29.93 100+ HK$27.21 300+ HK$25.16 900+ HK$25.08 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	15µH	3.9A	9.5A	0.087ohm	300nH	11.5mm	10mm	9mm	Surface Mount	-40°C	125°C	-

744877100	1869664 Data Sheet + RoHS	Inductor, DD 7345, 10 µH, 20%, 0.12 ohm, 1.1 A, 7.3mm x 7.3mm x 4.8mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1869664 1869664RL in Re-reel	1+ HK$20.55 10+ HK$19.57 25+ HK$19.32 50+ HK$18.25 100+ HK$16.86 250+ HK$16.61 500+ HK$15.54 1000+ HK$13.40 2000+ HK$13.32 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	10µH	1.1A	2.8A	0.12ohm	-	7.3mm	7.3mm	4.8mm	Surface Mount	-40°C	125°C	-

SRF0703-1R0M	1852810 Data Sheet + RoHS	Inductor, Power, Dual, 1 µH, 0.0135 ohm, 5.25 A, 7.6mm x 7.6mm x 3.4mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1852810 1852810RL in Re-reel	1+ HK$6.66 10+ HK$5.67 100+ HK$4.35 500+ HK$3.97 1000+ HK$3.62 1500+ HK$3.42 9000+ HK$3.38 24000+ HK$3.20 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF0703	1µH	5.25A	7.97A	0.0135ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

LPD5010-103MRB	2434726 Data Sheet + RoHS	Inductor, Coupled, 10 µH, 20%, 0.39 ohm, 500 mA, 4.8mm x 4.8mm x 0.9mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2434726 2434726RL in Re-reel	1+ HK$28.76 50+ HK$22.20 100+ HK$16.16 250+ HK$14.90 500+ HK$14.88 1000+ HK$14.86 5000+ HK$14.84 10000+ HK$14.81 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5010	10µH	500mA	670mA	0.39ohm	270nH	4.8mm	4.8mm	0.9mm	Surface Mount	-40°C	85°C	-

PFD3215-103MEC	2343795 Data Sheet + RoHS	Inductor, 10 µH, 20%, 1.25 ohm, 270 mA, COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2343795 2343795RL in Re-reel	5+ HK$11.02 500+ HK$8.47 2000+ HK$7.14	Restricted Item Minimum order of 5 items Multiples of 5 only Please enter a valid quantity Add Min: 5 Mult: 5	PFD3215	10µH	270mA	450mA	1.25ohm	310nH	3.3mm	2.3mm	1.5mm	Surface Mount	-40°C	85°C	-

74485540440	2336089 Data Sheet + RoHS	Inductor, Coupled, 4.4 µH, 20%, 9600 µohm, 12 A, 13.2mm x 13.2mm x 10.5mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2336089 2336089RL in Re-reel	1+ HK$57.16 10+ HK$56.26 50+ HK$44.61 100+ HK$42.64	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-CFWI	4.4µH	12A	24A	0.0096ohm	-	13.2mm	13.2mm	10.5mm	Surface Mount	-40°C	150°C	-

7448841068	2777650 Data Sheet + RoHS	Inductor, Powerchoke, 6.8 µH, 30%, 0.24 ohm, 1.4 A, 5.2mm x 5.2mm x 3.1mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	5+ HK$21.95 25+ HK$21.87 50+ HK$20.72 100+ HK$19.40 250+ HK$18.09 500+ HK$16.20 1000+ HK$15.71 2000+ HK$13.32 More Pricing...	Restricted Item Minimum order of 5 items Multiples of 5 only Please enter a valid quantity Add Min: 5 Mult: 5	WE-DPC	6.8µH	1.4A	1.7A	0.24ohm	170nH	5.2mm	5.2mm	3.1mm	Surface Mount	-40°C	125°C	-

B82477D4333M000	2254607 Data Sheet + RoHS	Inductor, Power, 33 µH, 20%, 0.11 ohm, 2.3 A, 12.5mm x 12.5mm x 8.5mm EPCOS You previously purchased this product. View in Order History	Each	1+ HK$17.92 10+ HK$16.40 25+ HK$14.02 50+ HK$12.53 100+ HK$10.74	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	B82477D4	33µH	2.3A	3.8A	0.11ohm	-	12.5mm	12.5mm	8.5mm	Surface Mount	-55°C	150°C	AEC-Q200

74485540101	3517116 Data Sheet + RoHS	COUPLED INDUCTOR, 10UH, 13A, 0.0139 OHM WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:3517116 3517116RL in Re-reel	1+ HK$45.05 10+ HK$41.52 25+ HK$41.02 50+ HK$38.06 100+ HK$31.32 200+ HK$31.24 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	13A	13.5A	0.0139ohm	-	15.5mm	13.2mm	12.5mm	Surface Mount	-40°C	150°C	-

CTX10-4-R	1463539 Data Sheet + RoHS	Inductor, 9.6 µH, 20%, 0.019 ohm, 3.4 A, 11.43mm x 11.43mm x 6.35mm EATON COILTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1463539 1463539RL in Re-reel	1+ HK$40.28 10+ HK$36.67 25+ HK$29.35 250+ HK$28.94 600+ HK$28.53 1200+ HK$28.12 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	OCTA-PAC	9.6µH	3.4A	-	0.019ohm	-	11.43mm	11.43mm	6.35mm	Surface Mount	-40°C	125°C	-

MSD1278-224KLD	2288082RL Data Sheet + RoHS	Inductor, Power, 220 µH, 10%, 0.345 ohm, 740 mA, 12.3mm x 12.3mm x 8.05mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288082RL 2288082 in Cut Tape 2297155 in Full Reel	1+ HK$25.82 250+ HK$18.17	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1278	220µH	740mA	2.3A	0.345ohm	1.54µH	12.3mm	12.3mm	8.05mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD7342-824MLC	2288190RL Data Sheet + RoHS	Inductor, Power, 820 µH, 20%, 3.4 ohm, 150 mA, 7.5mm x 7.5mm x 4.6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288190RL 2288190 in Cut Tape	100+ HK$13.06 250+ HK$13.04 1250+ HK$13.02 2500+ HK$13.00	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD7342	820µH	150mA	300mA	3.4ohm	8.01µH	7.5mm	7.5mm	4.6mm	Surface Mount	-40°C	85°C	AEC-Q200

SLC7530D-640MLC	2288956RL Data Sheet + RoHS	Inductor, Power, 64 nH, 20%, 0.209 ohm, 38 A, 7.5mm x 6.7mm x 3mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288956RL 2288956 in Cut Tape	1+ HK$18.17 250+ HK$12.75 500+ HK$8.88 1000+ HK$8.31	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	SLC7530	64nH	38A	32A	0.209ohm	-	7.5mm	6.7mm	3mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1278-224KLD	2288082 Data Sheet + RoHS	Inductor, Power, 220 µH, 10%, 0.345 ohm, 740 mA, 12.3mm x 12.3mm x 8.05mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288082 2288082RL in Re-reel 2297155 in Full Reel	1+ HK$25.82 250+ HK$18.17	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1278	220µH	740mA	2.3A	0.345ohm	1.54µH	12.3mm	12.3mm	8.05mm	Surface Mount	-40°C	85°C	AEC-Q200

744877101	1869666 Data Sheet + RoHS	Inductor, DD 7345, 100 µH, 20%, 1.3 ohm, 650 mA, 7.3mm x 7.3mm x 4.8mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1869666 1869666RL in Re-reel	1+ HK$20.75 10+ HK$19.77 50+ HK$18.37 100+ HK$16.90 500+ HK$15.50	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	100µH	650mA	900mA	1.3ohm	-	7.3mm	7.3mm	4.8mm	Surface Mount	-40°C	125°C	-

MSD1260-562MLD	2288028RL Data Sheet + RoHS	Inductor, Power, 5.6 µH, 20%, 0.02 ohm, 3 A, 12.3mm x 12.3mm x 6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288028RL 2288028 in Cut Tape	100+ HK$11.38 200+ HK$11.37 500+ HK$11.35 2500+ HK$11.33 5000+ HK$11.31	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1260	5.6µH	3A	9.66A	0.02ohm	200nH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

744877003	1869662 Data Sheet + RoHS	Inductor, DD 7345, 3.3 µH, 20%, 0.052 ohm, 3.7 A, 7.3mm x 7.3mm x 4.8mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1869662 1869662RL in Re-reel	1+ HK$20.75 10+ HK$19.77 50+ HK$18.37 100+ HK$16.90 500+ HK$15.50	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-DD	3.3µH	3.7A	5A	0.052ohm	-	7.3mm	7.3mm	4.8mm	Surface Mount	-40°C	125°C	-

74489440220	1869737 Data Sheet + RoHS	Inductor, TDC8038, 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) Cut Tape Packaging Options Suggested replacement for:1869737 1869737RL in Re-reel	1+ HK$17.47 10+ HK$17.19 50+ HK$16.55 100+ HK$15.92	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-TDC	22µH	1A	1.8A	0.228ohm	-	8mm	8mm	3.8mm	Surface Mount	-40°C	125°C	-

MSD1278-223MLD	2288101 Data Sheet + RoHS	Inductor, Power, 22 µH, 20%, 0.048 ohm, 1.99 A, 12.3mm x 12.3mm x 8.05mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288101 2288101RL in Re-reel	1+ HK$25.82 250+ HK$18.17 500+ HK$12.66 1000+ HK$11.76	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1278	22µH	1.99A	6.8A	0.048ohm	410nH	12.3mm	12.3mm	8.05mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1278-223MLD	2288101RL Data Sheet + RoHS	Inductor, Power, 22 µH, 20%, 0.048 ohm, 1.99 A, 12.3mm x 12.3mm x 8.05mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288101RL 2288101 in Cut Tape	1+ HK$25.82 250+ HK$18.17 500+ HK$12.66 1000+ HK$11.76	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1278	22µH	1.99A	6.8A	0.048ohm	410nH	12.3mm	12.3mm	8.05mm	Surface Mount	-40°C	85°C	AEC-Q200