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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 (Incl GST)	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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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+ $4.46 ($5.13) 250+ $3.14 ($3.61) 500+ $2.11 ($2.43) 1000+ $2.05 ($2.36)	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	-
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+ $1.65 ($1.90) 10+ $1.22 ($1.40) 100+ $0.932 ($1.07) 500+ $0.839 ($0.96) 1000+ $0.751 ($0.86) 1500+ $0.724 ($0.83) 9000+ $0.69 ($0.79) 24000+ $0.687 ($0.79) 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	-
SRF1280-101M	1852877 Data Sheet + RoHS	Inductor, Power, Dual, 100 µH, 0.175 ohm, 1.96 A, 12.5mm x 12.5mm x 8mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:1852877 1852877RL in Re-reel	1+ $3.14 ($3.61) 10+ $3.05 ($3.51) 25+ $2.80 ($3.22) 50+ $2.40 ($2.76) 100+ $2.14 ($2.46) 400+ $1.62 ($1.86) 800+ $1.57 ($1.81) 2400+ $1.52 ($1.75) 4800+ $1.47 ($1.69) 10000+ $1.40 ($1.61) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1280	100µH	1.96A	3.64A	0.175ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°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+ $4.22 ($4.85) 350+ $2.96 ($3.40) 700+ $2.08 ($2.39) 1050+ $1.93 ($2.22)	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
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+ $6.59 ($7.58) 250+ $4.64 ($5.34) 500+ $3.24 ($3.73) 750+ $3.02 ($3.47)	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	-

SRF1260-100M	1852844 Data Sheet + RoHS	Inductor, Power, Dual, 10 µH, 0.0246 ohm, 5.35 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:1852844 1852844RL in Re-reel	1+ $2.11 ($2.43) 10+ $1.80 ($2.07) 100+ $1.29 ($1.48) 400+ $1.18 ($1.36) 800+ $1.12 ($1.29) 2400+ $1.09 ($1.25) 10000+ $1.03 ($1.18) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1260	10µH	5.35A	7.17A	0.0246ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

MSD1260-154KLD	2288015 Data Sheet + RoHS	Inductor, Power, 150 µH, 10%, 0.238 ohm, 870 mA, 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:2288015 2288015RL in Re-reel	1+ $5.35 ($6.15) 10+ $3.28 ($3.77) 50+ $2.55 ($2.93) 100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.76 ($4.32) 500+ $2.63 ($3.02) 1000+ $2.44 ($2.81) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1260	150µH	870mA	1.82A	0.238ohm	1.52µH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1260-474KLD	2288021 Data Sheet + RoHS	Inductor, Power, 470 µH, 10%, 0.795 ohm, 480 mA, 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:2288021 2288021RL in Re-reel	1+ $4.20 ($4.83) 10+ $3.28 ($3.77) 50+ $2.55 ($2.93) 100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.68 ($4.23) 500+ $2.25 ($2.59) 1000+ $2.40 ($2.76) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1260	470µH	480mA	1A	0.795ohm	2.89µH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

SRF1280-101M	1852877RL Data Sheet + RoHS	Inductor, Power, Dual, 100 µH, 0.175 ohm, 1.96 A, 12.5mm x 12.5mm x 8mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:1852877RL 1852877 in Cut Tape	100+ $2.14 ($2.46) 400+ $1.62 ($1.86) 800+ $1.57 ($1.81) 2400+ $1.52 ($1.75) 4800+ $1.47 ($1.69) 10000+ $1.40 ($1.61) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	SRF1280	100µH	1.96A	3.64A	0.175ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

MSD1260-472MLD	2288027 Data Sheet + RoHS	Inductor, Power, 4.7 µH, 20%, 0.018 ohm, 3.16 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:2288027 2288027RL in Re-reel	1+ $5.25 ($6.04) 10+ $3.28 ($3.77) 50+ $2.55 ($2.93) 100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.68 ($4.23) 500+ $2.57 ($2.96) 1000+ $2.40 ($2.76) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	MSD1260	4.7µH	3.16A	10.3A	0.018ohm	200nH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1583-183MEB	2288153 Data Sheet + RoHS	Inductor, Power, 18 µH, 20%, 0.024 ohm, 3.04 A, 14.8mm x 14.8mm x 8.6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape Packaging Options Suggested replacement for:2288153 2288153RL in Re-reel	1+ $7.98 ($9.18) 10+ $4.89 ($5.62) 25+ $3.79 ($4.36) 50+ $3.67 ($4.22) 100+ $3.54 ($4.07) 300+ $3.35 ($3.85) 600+ $3.92 ($4.51) 900+ $3.64 ($4.19) 1500+ $3.06 ($3.52) 3000+ $3.05 ($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	MSD1583	18µH	3.04A	8.7A	0.024ohm	400nH	14.8mm	14.8mm	8.6mm	Surface Mount	-40°C	85°C	-

SRF0703-4R7M	1852815RL 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) Re-reel Packaging Options Suggested replacement for:1852815RL 1852815 in Cut Tape	100+ $0.932 ($1.07) 500+ $0.839 ($0.96) 1000+ $0.751 ($0.86) 1500+ $0.724 ($0.83) 9000+ $0.69 ($0.79) 24000+ $0.687 ($0.79) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	SRF0703	4.7µH	3.09A	3.78A	0.0406ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

SRF1260-221M	1852854 Data Sheet + RoHS	Inductor, Power, Dual, 220 µH, 0.354 ohm, 1.19 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:1852854 1852854RL in Re-reel	1+ $2.03 ($2.33) 10+ $1.79 ($2.06) 100+ $1.38 ($1.59) 400+ $1.20 ($1.38) 800+ $1.11 ($1.28) 2400+ $1.09 ($1.25) 10000+ $1.05 ($1.21) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1260	220µH	1.19A	1.51A	0.354ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

MSD1260-472MLD	2288027RL Data Sheet + RoHS	Inductor, Power, 4.7 µH, 20%, 0.018 ohm, 3.16 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:2288027RL 2288027 in Cut Tape	1+ $4.20 ($4.83) 100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.68 ($4.23) 500+ $2.25 ($2.59) 1000+ $2.40 ($2.76) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1260	4.7µH	3.16A	10.3A	0.018ohm	200nH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1260-474KLD	2288021RL Data Sheet + RoHS	Inductor, Power, 470 µH, 10%, 0.795 ohm, 480 mA, 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:2288021RL 2288021 in Cut Tape	100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.68 ($4.23) 500+ $2.57 ($2.96) 1000+ $2.40 ($2.76) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1260	470µH	480mA	1A	0.795ohm	2.89µH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

MSD1583-183MEB	2288153RL Data Sheet + RoHS	Inductor, Power, 18 µH, 20%, 0.024 ohm, 3.04 A, 14.8mm x 14.8mm x 8.6mm COILCRAFT You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:2288153RL 2288153 in Cut Tape	100+ $3.54 ($4.07) 300+ $3.35 ($3.85) 600+ $3.92 ($4.51) 900+ $3.64 ($4.19) 1500+ $3.06 ($3.52) 3000+ $3.05 ($3.51) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1583	18µH	3.04A	8.7A	0.024ohm	400nH	14.8mm	14.8mm	8.6mm	Surface Mount	-40°C	85°C	-

LPD6235-223MRC	2434757RL 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) Re-reel Packaging Options Suggested replacement for:2434757RL 2434757 in Cut Tape	1+ $4.22 ($4.85) 350+ $2.96 ($3.40) 700+ $2.08 ($2.39) 1050+ $1.93 ($2.22)	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	LPD6235	22µH	850mA	1.5A	0.15ohm	150nH	6mm	6mm	3.5mm	Surface Mount	-40°C	125°C	AEC-Q200

LPD5030V-154MRC	2434715RL 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) Re-reel Packaging Options Suggested replacement for:2434715RL 2434715 in Cut Tape	1+ $6.59 ($7.58) 250+ $4.64 ($5.34) 500+ $3.14 ($3.61) 750+ $3.02 ($3.47)	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	LPD5030V	150µH	180mA	250mA	1.91ohm	456nH	4.8mm	4.8mm	2.9mm	Surface Mount	-40°C	85°C	-

MSD1260-154KLD	2288015RL Data Sheet + RoHS	Inductor, Power, 150 µH, 10%, 0.238 ohm, 870 mA, 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:2288015RL 2288015 in Cut Tape	100+ $2.46 ($2.83) 200+ $2.38 ($2.74) 250+ $3.76 ($4.32) 500+ $2.63 ($3.02) 1000+ $2.44 ($2.81) 2500+ $2.06 ($2.37) 5000+ $2.05 ($2.36) More Pricing...	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	MSD1260	150µH	870mA	1.82A	0.238ohm	1.52µH	12.3mm	12.3mm	6mm	Surface Mount	-40°C	85°C	AEC-Q200

SRF1260-100M	1852844RL Data Sheet + RoHS	Inductor, Power, Dual, 10 µH, 0.0246 ohm, 5.35 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:1852844RL 1852844 in Cut Tape	100+ $1.29 ($1.48) 400+ $1.18 ($1.36) 800+ $1.12 ($1.29) 2400+ $1.09 ($1.25) 10000+ $1.03 ($1.18)	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	SRF1260	10µH	5.35A	7.17A	0.0246ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

LPR4012-202LMLB	2361074RL 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) Re-reel Packaging Options Suggested replacement for:2361074RL 2361074 in Cut Tape	1+ $4.46 ($5.13) 250+ $3.14 ($3.61) 500+ $2.41 ($2.77) 1000+ $2.05 ($2.36)	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	LPR4012	2µH	1.73A	1.73A	0.24ohm	-	3.94mm	3.94mm	1.1mm	Surface Mount	-40°C	85°C	-

SRF1260-221M	1852854RL Data Sheet + RoHS	Inductor, Power, Dual, 220 µH, 0.354 ohm, 1.19 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Re-reel Packaging Options Suggested replacement for:1852854RL 1852854 in Cut Tape	100+ $1.38 ($1.59) 400+ $1.20 ($1.38) 800+ $1.11 ($1.28) 2400+ $1.09 ($1.25) 10000+ $1.05 ($1.21)	Restricted Item Minimum order of 100 items Multiples of 1 only Please enter a valid quantity Add Min: 100 Mult: 1	SRF1260	220µH	1.19A	1.51A	0.354ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

SRF0703-220M	2821310 Data Sheet RoHS	POWER INDUCTOR, 22UH, 1.62A, 20% BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel) Full Reel	1500+ $0.729 ($0.84) 9000+ $0.724 ($0.83) 24000+ $0.687 ($0.79)	Restricted Item Minimum order of 1500 items Multiples of 1500 only Please enter a valid quantity Add Min: 1500 Mult: 1500	SRF0703 Series	22µH	1.62A	1.67A	0.15ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	-

ERUC23-4R1K	4308674 New product Data Sheet RoHS	COUPLED INDUCTOR, 4.1UH, 0.00185OHM, 24A EPCOS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ $34.73 ($39.94) 5+ $23.15 ($26.62) 10+ $18.53 ($21.31) 25+ $14.62 ($16.81) 50+ $12.29 ($14.13) 100+ $11.68 ($13.43) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	-	-	-	-	-	-	-	-	-	-	-	-	-

ERUC23-1R8K	4308678 New product Data Sheet RoHS	COUPLED INDUCTOR, 1.8UH, 820 UOHM, 33A EPCOS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape) Cut Tape	1+ $34.73 ($39.94) 5+ $23.15 ($26.62) 10+ $18.53 ($21.31) 25+ $14.62 ($16.81) 50+ $12.29 ($14.13) 100+ $11.68 ($13.43) More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	-	-	-	-	-	-	-	-	-	-	-	-	-