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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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7448991068	28AH8234 + RoHS Date/Lot Code	COUPLED INDUCTOR, 6.8UH, 5A 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+ $3.68 10+ $3.29 25+ $3.08 50+ $2.88 100+ $2.67	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	-
VPH5-0155-R	28K5792 Data Sheet + RoHS	Inductor, Power, 22.3 µH, 30%, 0.0711 ohm, 1.7 A, 21mm x 21mm x 10.8mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each	25+ $9.56 50+ $8.38 100+ $7.83 250+ $7.55 500+ $6.99	Restricted Item Minimum order of 35 items Multiples of 35 only Please enter a valid quantity Add Min: 35 Mult: 35	VERSA-PAC Series	22.3µH	1.7A	1.05A	-	0.0711ohm	235nH	21mm	21mm	10.8mm	Surface Mount	-40°C	125°C	-
DRQ74-4R7-R	27K7281 Data Sheet + RoHS	Inductor, Power, 5.182 µH, 20%, 0.0254 ohm, 3.34 A, 7.6mm x 7.6mm x 4.45mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $1.44	Restricted Item Minimum order of 1100 items Multiples of 1100 only Please enter a valid quantity Add Min: 1100 Mult: 1100	DRQ Series	5.182µH	3.34A	4.37A	-	0.0254ohm	-	7.6mm	7.6mm	4.45mm	Surface Mount	125°C	-40°C	-
744873101	32T8612 Data Sheet + RoHS	Inductor, 100 µH, 20%, 0.255 ohm, 1.38 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+ $3.44 10+ $3.27 25+ $3.18 50+ $3.06 100+ $2.85 250+ $2.63 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	100µH	1.38A	2.2A	-	0.255ohm	-	12.5mm	12.5mm	8.5mm	Surface Mount	-40°C	125°C	-
SRF1260-3R3Y	14T0937 Data Sheet + RoHS	Inductor, Power, 3.3 µH, ± 20%, 0.0101 ohm, 9.26 A, SMD, 12.5mm x 12.5mm x 6mm, SRF1260 Series BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.09	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	3.3µH	9.26A	12.7A	-	0.0101ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

SRF1260-8R2Y	14T0955 Data Sheet + RoHS	POWER INDUCTOR, 8.2UH, 5.54A, 20% BOURNS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $1.02	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	-

SRF0703A-680M	31Y4580 Data Sheet Data Sheet + RoHS	INDUCTOR, 68UH, 20%, 0.89A, COUPLED BOURNS 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+ $1.13 10+ $0.938 25+ $0.906 50+ $0.873 100+ $0.833 250+ $0.769 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF0703A	68µH	890mA	960mA	-	0.507ohm	-	7.6mm	7.6mm	3.4mm	Surface Mount	-40°C	125°C	AEC-Q200

SRF1280-1R0Y	23T1273 Data Sheet + RoHS	INDUCTOR, DUAL, 1UH PARA., POWER BOURNS 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+ $1.41 10+ $1.32 25+ $1.22 50+ $1.06 100+ $0.962 250+ $0.845 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1280	1µH	15.5A	40A	-	0.0067ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

SRF1280-330M	23T1284 + RoHS	INDUCTOR, DUAL, 33UH PARA., POWER BOURNS 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+ $2.29 10+ $2.19 25+ $2.03 50+ $1.85 100+ $1.66 250+ $1.47 500+ $1.29 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1280	33µH	3.23A	6.22A	-	0.0664ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

7448990150	50AC8122 Data Sheet + RoHS Date/Lot Code	INDUCTOR, 15UH, 3.9A, 20%, COUPLED 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+ $4.62 10+ $4.12 25+ $3.93 50+ $3.74 100+ $3.45	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	-

DRQ127-100-R	09AH9129 Data Sheet + 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+ $2.00 10+ $1.86 25+ $1.48 50+ $1.42 100+ $1.34	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	DRQ	10.47µH	6.04A	11.2A	-	0.0172ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

CTX100-1P-R	52K7410 Data Sheet + RoHS	Inductor, Power, 99.01 µH, 20%, 0.557 ohm, 540 mA, 8.89mm x 8.89mm x 4.19mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $3.76	Restricted Item Minimum order of 1100 items Multiples of 1100 only Please enter a valid quantity Add Min: 1100 Mult: 1100	ECONO-PAC 1P Series	99.01µH	540mA	-	-	0.557ohm	-	8.89mm	8.89mm	4.19mm	Surface Mount	-40°C	125°C	-

DRQ127-3R3-R	27K7232 Data Sheet + RoHS	Inductor, Power, 2.831 µH, 20%, 5670 µohm, 10.4 A, 12.5mm x 12.5mm x 8mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	100+ $2.45	Restricted Item Minimum order of 350 items Multiples of 350 only Please enter a valid quantity Add Min: 350 Mult: 350	DRQ Series	2.831µH	10.4A	21.5A	-	0.00567ohm	-	12.5mm	12.5mm	8mm	Surface Mount	125°C	-40°C	-

CTX0.47-2P-R	52K7388 Data Sheet + RoHS	POWER INDUCTOR, 540NH, 5.9A, 20% EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $2.34	Restricted Item Minimum order of 800 items Multiples of 800 only Please enter a valid quantity Add Min: 800 Mult: 800	ECONO-PAC 2P Series	540nH	5.9A	-	-	0.006ohm	-	8.89mm	8.89mm	5.97mm	Surface Mount	-40°C	125°C	-

CTX10-2-R	29K6150 Data Sheet + RoHS	Inductor, Power, 10.58 µH, 20%, 0.031 ohm, 2.5 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+ $4.30	Restricted Item Minimum order of 800 items Multiples of 800 only Please enter a valid quantity Add Min: 800 Mult: 800	OCTA-PAC CTX 1 Series	10.58µH	2.5A	-	-	0.031ohm	-	8.89mm	8.89mm	5.97mm	Surface Mount	-40°C	125°C	-

CTX200-4-R	52K7449 Data Sheet + RoHS	Inductor, Power, 200.7 µH, 20%, 0.545 ohm, 640 mA, 11.43mm x 11.43mm x 6.35mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $4.19	Restricted Item Minimum order of 600 items Multiples of 600 only Please enter a valid quantity Add Min: 600 Mult: 600	OCTA-PAC Series	200.7µH	640mA	-	-	0.545ohm	-	11.43mm	11.43mm	6.35mm	Surface Mount	-40°C	125°C	-

LPD6235-205MRC	79X5716 Data Sheet Data Sheet + RoHS	COUPLED INDUCTOR, 2000UH, 0.16A, 20% 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+ $1.97 10+ $1.91	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	LPD6235	2mH	110mA	80mA	-	8ohm	2.1µH	6mm	6mm	3.5mm	Surface Mount	-40°C	125°C	AEC-Q200

SRF1260-3R3Y	14T0938 Data Sheet + RoHS	Inductor, Power, 3.3 µH, 20%, 0.0101 ohm, 9.26 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	800+ $0.775 1600+ $0.73 2400+ $0.684 4000+ $0.672 8000+ $0.66	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	3.3µH	9.26A	12.7A	-	0.0101ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

SRF1280-331M	14T0987 Data Sheet + RoHS	Inductor, Power, 330 µH, 20%, 0.54 ohm, 1.04 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	330µH	1.04A	2.01A	-	0.54ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	-

PM3602-300-RC	63K3593 Data Sheet + RoHS	Inductor, Power, 300 µH, 20%, 1.31 ohm, 320 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+ $1.17	Restricted Item Minimum order of 400 items Multiples of 400 only Please enter a valid quantity Add Min: 400 Mult: 400	PM3600 Series	300µH	320mA	-	-	1.31ohm	-	11.48mm	8.99mm	5.72mm	Surface Mount	-55°C	125°C	-

SRF1260-1R0Y	14T0917 Data Sheet + RoHS	Inductor, Power, 1 µH, 20%, 6200 µohm, 15 A, 12.5mm x 12.5mm x 6mm BOURNS You previously purchased this product. View in Order History	Each (Supplied on Full Reel)	800+ $0.76 1600+ $0.748 2400+ $0.735 4000+ $0.712 8000+ $0.688	Restricted Item Minimum order of 800 items Multiples of 400 only Please enter a valid quantity Add Min: 800 Mult: 400	SRF1260 Series	1µH	15A	23.6A	-	0.0062ohm	-	12.5mm	12.5mm	6mm	Surface Mount	-40°C	105°C	-

SRF0703-220M	23T1235 Data Sheet + RoHS	INDUCTOR, DUAL, 22UH PARA., POWER BOURNS 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+ $0.935 10+ $0.77 25+ $0.745 50+ $0.718 100+ $0.686 250+ $0.632 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	-

SRF1280A-150M	31Y4600 Data Sheet Data Sheet + RoHS	INDUCTOR, 15UH, 20%, 5.03A, COUPLED BOURNS 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+ $2.09 10+ $1.95 25+ $1.81 50+ $1.57 100+ $1.42 250+ $1.24 More Pricing...	Restricted Item Minimum order of 1 items Multiples of 1 only Please enter a valid quantity Add Min: 1 Mult: 1	SRF1280A	15µH	5.03A	9.66A	-	0.0333ohm	-	12.5mm	12.5mm	8mm	Surface Mount	-40°C	125°C	AEC-Q200

VP2-0216-R	29K6714 Data Sheet + RoHS	Inductor, Standard, 10.6 µH, 20%, 0.09 ohm, 1.26 A, 16.3mm x 12mm x 7.8mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	250+ $7.13	Restricted Item Minimum order of 300 items Multiples of 300 only Please enter a valid quantity Add Min: 300 Mult: 300	VERSA-PAC Series	10.6µH	1.26A	760mA	-	0.09ohm	83nH	16.3mm	12mm	7.8mm	Surface Mount	-40°C	125°C	-

CTX33-1P-R	52K7467 Data Sheet + RoHS	Inductor, Power, 32.33 µH, 20%, 0.25 ohm, 800 mA, 8.89mm x 8.89mm x 4.19mm EATON ELECTRONICS You previously purchased this product. View in Order History	Each (Supplied on Cut Tape)	500+ $2.78	Restricted Item Minimum order of 1100 items Multiples of 1100 only Please enter a valid quantity Add Min: 1100 Mult: 1100	ECONO-PAC 1P Series	32.33µH	800mA	-	-	0.25ohm	-	8.89mm	8.89mm	4.19mm	Surface Mount	-40°C	125°C	-