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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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74488540070	2249879 Data Sheet + RoHS	Inductor, Energy Harvesting, 7.5 µH, 0.095 ohm, 1.9 A, 6mm x 6mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ HK$32.34 10+ HK$31.58 50+ HK$30.22 100+ HK$27.41 500+ HK$25.36	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-EHPI	7.5µH	1.9A	1.3A	0.095ohm	-	6mm	6mm	4mm	Surface Mount	-40°C	125°C	-
LPR6235-752SMRB	2434775 Data Sheet + RoHS	Inductor, Coupled, 7.5 µH, 316 ohm, 6mm x 6mm x 3.5mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2434775 2434775RL in Re-reel	1+ HK$22.15 10+ HK$19.54 50+ HK$16.98 100+ HK$15.23 200+ HK$13.52 350+ HK$11.15 700+ HK$10.46 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPR6235	7.5µH	-	1.6A	316ohm	-	6mm	6mm	3.5mm	Surface Mount	-40°C	85°C	-
LPR4012-202LMLB	2361074 Data Sheet + RoHS	Inductor, Coupled, 2 µH, 0.24 ohm, 1.73 A, 3.94mm x 3.94mm x 1.1mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2361074 2361074RL in Re-reel	1+ HK$16.61 10+ HK$14.90 50+ HK$13.36 100+ HK$11.90 250+ HK$10.45 500+ HK$9.76 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPR4012	2µH	1.73A	1.73A	0.24ohm	-	3.94mm	3.94mm	1.1mm	Surface Mount	-40°C	85°C	-
74488540120	2249880 Data Sheet + RoHS	Inductor, Energy Harvesting, 13 µH, 0.1 ohm, 1.7 A, 6mm x 6mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ HK$32.34 10+ HK$31.58 50+ HK$30.22 100+ HK$27.41 500+ HK$25.36	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-EHPI	13µH	1.7A	1A	0.1ohm	-	6mm	6mm	4mm	Surface Mount	-40°C	125°C	-
SRF0703-4R7M	1852815 Data Sheet + RoHS	Inductor, Power, Dual, 4.7 µH, 0.0406 ohm, 3.09 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:1852815 1852815RL in Re-reel	1+ HK$9.08 10+ HK$8.33 25+ HK$6.53 100+ HK$6.12 250+ HK$5.47 500+ HK$4.64 1000+ HK$4.18 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF0703	4.7µH	3.09A	3.78A	0.0406ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

LPD5030-473MRC	2434745 Data Sheet + RoHS	Inductor, Coupled, 47 µH, 20%, 0.403 ohm, 500 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:2434745 2434745RL in Re-reel	1+ HK$13.19 10+ HK$11.82 50+ HK$10.62 100+ HK$9.51 200+ HK$8.91 500+ HK$8.33 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5030	47µH	500mA	590mA	0.403ohm	240nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	AEC-Q200

74488540250	2249882 Data Sheet + RoHS	Inductor, Energy Harvesting, 25 µH, 0.24 ohm, 1.5 A, 6mm x 6mm x 4mm WURTH ELEKTRONIK You previously purchased this product. View in Order History	Each	1+ HK$32.34 10+ HK$31.58 50+ HK$30.22 100+ HK$27.41 500+ HK$25.36	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	WE-EHPI	25µH	1.5A	700mA	0.24ohm	-	6mm	6mm	4mm	Surface Mount	-40°C	125°C	-

SRF1260-220M	1852846 Data Sheet + RoHS	Inductor, Power, Dual, 22 µH, 0.0451 ohm, 3.7 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:1852846 1852846RL in Re-reel	1+ HK$12.93 10+ HK$11.90 25+ HK$9.68 100+ HK$8.82 250+ HK$7.78	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1260	22µH	3.7A	4.71A	0.0451ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

LPD5030-682MRB	2434740 Data Sheet + RoHS	Inductor, Coupled, 6.8 µH, 20%, 0.0795 ohm, 1.2 A, 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:2434740 2434740RL in Re-reel	1+ HK$11.22 10+ HK$10.02 50+ HK$8.99 100+ HK$8.05 200+ HK$7.58 500+ HK$7.11 750+ HK$5.89 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5030	6.8µH	1.2A	1.4A	0.0795ohm	120nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	AEC-Q200

SDQ25-100-R	1195550 Data Sheet + RoHS	POWER INDUCTOR, 10UH, 1.53A, 20% EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ HK$28.38 10+ HK$26.02 25+ HK$23.65 50+ HK$19.87 100+ HK$17.03 250+ HK$16.35 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	-

MSD1278-154KLD	2288080 Data Sheet + RoHS	Inductor, Power, 150 µH, 10%, 0.23 ohm, 910 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:2288080 2288080RL in Re-reel	1+ HK$18.15 10+ HK$16.27 50+ HK$14.64 100+ HK$13.02 200+ HK$11.99	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1278	150µH	910mA	2.8A	0.23ohm	1.46µH	12.3mm	12.3mm	8.05mm	Surface Mount	-40°C	85°C	AEC-Q200

IHCL4040DZER150M5A	2429151 Data Sheet + RoHS	Inductor, Coupled, 15 µH, 20%, 0.1186 ohm, 3.5 A, 10.67mm x 10.16mm x 4mm VISHAY You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2429151 2429151RL in Re-reel	1+ HK$22.43 10+ HK$20.81 25+ HK$17.72 100+ HK$15.33 250+ HK$13.87	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	IHCL-4040DZ-5A	15µH	3.5A	6A	0.1186ohm	-	10.67mm	10.16mm	4mm	Surface Mount	-55°C	155°C	AEC-Q200

LPR6235-253LMRB	2434771 Data Sheet + RoHS	Inductor, Coupled, 25 µH, 13.7 ohm, 6mm x 6mm x 3.5mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2434771 2361094 in Full Reel 2434771RL in Re-reel	1+ HK$22.15 10+ HK$19.54 50+ HK$16.98 100+ HK$15.23 200+ HK$13.52 350+ HK$11.15 700+ HK$10.46 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPR6235	25µH	-	1.3A	13.7ohm	-	6mm	6mm	3.5mm	Surface Mount	-40°C	85°C	-

LPD6235-223MRC	2434757 Data Sheet + RoHS	Inductor, Coupled, 22 µH, 20%, 0.15 ohm, 850 mA, 6mm x 6mm x 3.5mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2434757 2434757RL in Re-reel	1+ HK$14.64 10+ HK$12.42 50+ HK$12.33 100+ HK$12.16 200+ HK$11.99	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD6235	22µH	850mA	1.5A	0.15ohm	150nH	6mm	6mm	3.5mm	Surface Mount	-40°C	125°C	AEC-Q200

IHCL4040DZER4R7M5A	2429149 Data Sheet + RoHS	Inductor, Coupled, 4.7 µH, 20%, 0.0287 ohm, 6.5 A, 10.67mm x 10.16mm x 4mm VISHAY You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2429149 2429149RL in Re-reel	1+ HK$22.52 10+ HK$20.89 25+ HK$17.72 100+ HK$15.84 250+ HK$13.62	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	IHCL-4040DZ-5A	4.7µH	6.5A	11.5A	0.0287ohm	-	10.67mm	10.16mm	4mm	Surface Mount	-55°C	155°C	AEC-Q200

SRF0703-220M	1852820 Data Sheet + RoHS	Inductor, Power, Dual, 22 µH, 0.15 ohm, 1.62 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:1852820 1852820RL in Re-reel	1+ HK$9.11 10+ HK$8.44 25+ HK$7.79 50+ HK$6.49 100+ HK$6.10 250+ HK$5.45 500+ HK$4.67 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF0703	22µH	1.62A	1.67A	0.15ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

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$8.03	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$14.56 10+ HK$12.25 50+ HK$11.82 100+ HK$10.79 500+ HK$8.50	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

MSD1260-103MLD	2288031 Data Sheet + RoHS	Inductor, Power, 10 µH, 20%, 0.03 ohm, 2.45 A, 12.3mm x 12.3mm x 6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288031 2288031RL in Re-reel	1+ HK$17.47 10+ HK$15.58 50+ HK$14.04 100+ HK$12.50 200+ HK$11.05 500+ HK$9.76 1000+ HK$8.99 2000+ HK$8.49 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1260	10µH	2.45A	7.4A	0.03ohm	260nH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

LPD5030-153MRC	2287516RL Data Sheet + RoHS	Inductor, Power, 15 µH, 20%, 0.149 ohm, 850 mA, 4.8mm x 4.8mm x 2.9mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2287516RL 2287516 in Cut Tape	100+ HK$9.04 500+ HK$8.38 750+ HK$7.00 1500+ HK$6.23	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	LPD5030	15µH	850mA	1A	0.149ohm	150nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD7342-472MLC	2288160 Data Sheet + RoHS	Inductor, Power, 4.7 µH, 20%, 0.0255 ohm, 1.74 A, 7.5mm x 7.5mm x 4.6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288160 2288160RL in Re-reel	1+ HK$22.35 10+ HK$19.95 50+ HK$17.98 100+ HK$16.61	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD7342	4.7µH	1.74A	4.1A	0.0255ohm	110nH	7.5mm	7.5mm	4.6mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD7342-224MLC	2288182 Data Sheet + RoHS	Inductor, Power, 220 µH, 20%, 0.86 ohm, 300 mA, 7.5mm x 7.5mm x 4.6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288182 2288182RL in Re-reel	1+ HK$19.18 10+ HK$17.12 50+ HK$15.41 100+ HK$13.70	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD7342	220µH	300mA	590mA	0.86ohm	1.43µH	7.5mm	7.5mm	4.6mm	Surface Mount	-40°C	85°C	AEC-Q200

LPD5030-153MRC	2287516 Data Sheet + RoHS	Inductor, Power, 15 µH, 20%, 0.149 ohm, 850 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:2287516 2287516RL in Re-reel	1+ HK$13.44 10+ HK$11.06 50+ HK$9.44 100+ HK$9.04 500+ HK$8.38 750+ HK$7.00 1500+ HK$6.23 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5030	15µH	850mA	1A	0.149ohm	150nH	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$25.45 10+ HK$24.17 50+ HK$22.47 100+ HK$20.77 250+ HK$18.98	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	-

LPD5030V-154MRC	2434715 Data Sheet + RoHS	Inductor, Coupled, 150 µH, 20%, 1.91 ohm, 180 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:2434715 2434715RL in Re-reel	1+ HK$24.40 10+ HK$21.83 50+ HK$19.69 100+ HK$17.55 200+ HK$15.24 500+ HK$13.79 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD5030V	150µH	180mA	250mA	1.91ohm	456nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	-