Coupled Inductors–MSD7342 Series

Specifications subject to change without notice.

Please check our website for latest information.

Document 621-2

Document 621-2 Revised 02/23/11

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© Coilcraft Inc. 2013

This product may not be used in medical or high

risk applications without prior Coilcraft approval.

Specification subject to change without notice.

Please check web site for latest information.

Document 621-2 Revised 11/07/13

Coupling

Leakage

Irms (A)

10%

20%

30%

both

one

±20% (µH)

(Ohms)

(MHz)

typ

(µH)

drop

drop

drop

MSD7342-252ML_

2.5

0.033

55

0.97

0.14

6.0

6.2

6.3

2.17

3.06

MSD7342-332ML_

3.3

0.037

43

0.99

0.09

5.2

5.3

5.4

2.05

2.89

MSD7342-472ML_

4.7

0.051

35

0.99

0.11

4.1

4.3

4.6

1.74

2.46

MSD7342-562ML_

5.6

0.063

32

0.99

0.09

3.9

4.1

4.2

1.57

2.22

MSD7342-682ML_

6.8

0.070

30

0.99

0.14

3.7

3.8

3.9

1.49

2.10

MSD7342-822ML_

8.2

0.075

27

0.98

0.25

3.3

3.4

3.5

1.44

2.03

MSD7342-103ML_

10

0.100

22

0.98

0.30

2.8

2.9

3.0

1.24

1.76

MSD7342-123ML_

12

0.120

20

0.98

0.36

2.5

2.6

2.7

1.14

1.61

MSD7342-153ML_

15

0.130

18

0.98

0.49

2.2

2.3

2.4

1.09

1.54

MSD7342-183ML_

18

0.170

15

>0.99

0.16

2.0

2.2

2.3

0.95

1.35

MSD7342-223ML_

22

0.220

13.5

>0.99

0.20

1.9

2.0

2.1

0.84

1.19

MSD7342-273ML_

27

0.250

12.0

>0.99

0.20

1.7

1.8

1.9

0.79

1.11

MSD7342-333ML_

33

0.270

11.0

>0.99

0.15

1.5

1.6

1.7

0.76

1.07

MSD7342-393ML_

39

0.380

10.0

0.99

0.70

1.3

1.4

1.5

0.64

0.90

MSD7342-473ML_

47

0.420

9.5

>0.99

0.30

1.2

1.3

1.4

0.61

0.86

MSD7342-563ML_

56

0.460

8.7

>0.99

0.51

1.1

1.2

1.3

0.58

0.82

MSD7342-683ML_

68

0.600

7.3

>0.99

0.51

1.0

1.1

1.2

0.51

0.72

MSD7342-823ML_

82

0.680

6.2

0.99

1.17

0.90

1.00

1.1

0.48

0.67

MSD7342-104ML_

100

0.770

5.5

>0.99

0.96

0.80

0.92

0.98

0.45

0.63

MSD7342-124ML_

120

1.03

4.5

>0.99

0.61

0.70

0.80

0.90

0.39

0.55

MSD7342-154ML_

150

1.35

4.0

>0.99

0.54

0.65

0.76

0.80

0.34

0.48

MSD7342-184ML_

180

1.52

3.8

>0.99

0.75

0.62

0.66

0.73

0.32

0.45

MSD7342-224ML_

220

1.72

3.5

>0.99

1.43

0.59

0.62

0.66

0.30

0.42

MSD7342-274ML_

270

2.41

3.3

>0.99

1.56

0.55

0.57

0.60

0.25

0.36

MSD7342-334ML_

330

2.70

3.0

>0.99

1.65

0.49

0.52

0.54

0.24

0.34

MSD7342-394ML_

390

3.05

2.8

0.99

4.73

0.45

0.47

0.50

0.23

0.32

MSD7342-474ML_

470

4.00

2.6

0.99

5.50

0.41

0.43

0.46

0.20

0.28

MSD7342-564ML_

560

4.43

2.5

>0.99

4.85

0.38

0.40

0.42

0.19

0.26

MSD7342-684ML_

680

5.00

2.3

0.99

7.59

0.36

0.37

0.38

0.18

0.25

MSD7342-824ML_

820

6.80

2.2

>0.99

8.01

0.30

0.32

0.35

0.15

0.21

MSD7342-105ML_

1000

7.80

2.0

>0.99

8.69

0.27

0.29

0.31

0.14

0.20

1. When ordering, please specify

termination and packaging codes:

MSD7342-105MLC

Termination: L = RoHS compliant matte tin over nickel over phos bronze.

Special order:

T = RoHS tin-silver-copper

(95.5/4/0.5) or

S = non-RoHS tin-lead (63/37).

Packaging: C = 7

″ machine-ready reel. EIA-481 embossed plastic

tape (250 parts per full reel).

B = Less than full reel. In tape, but not machine ready.

To have a leader and trailer added ($25 charge), use

code letter C instead.

D = 13

″ machine-ready reel. EIA-481 embossed plastic

tape. Factory order only, not stocked (1000 parts per

full reel).

2. Inductance shown for each winding, measured at 100 kHz, 0.1 Vrms,

0 Adc on an Agilent/HP 4284A LCR meter or equivalent. When leads

are connected in parallel, inductance is the same value. When leads are

connected in series, inductance is four times the value.

3. DCR is for each winding. When leads are connected in parallel, DCR

is half the value. When leads are connected in series, DCR is twice the

value.

4. SRF measured using an Agilent/HP 4191A or equivalent. When leads

are connected in parallel, SRF is the same value.

5. Leakage inductance is for L1 and is measured with L2 shorted.

6. DC current, at which the inductance drops the specified amount from its

value without current. It is the sum of the current flowing in both windings.

7. Equal current when applied to each winding simultaneously that causes

a 40°C temperature rise from 25°C ambient. See temperature rise

calculation.

8. Maximum current when applied to one winding that causes a 40°C

temperature rise from 25°C ambient. See temperature rise calculation.

9. Electrical specifications at 25°C.

Refer to Doc 639 “Selecting Coupled Inductors for SEPIC Applications.”

Refer to Doc 362 “Soldering Surface Mount Components” before soldering.

Coupled Inductor Core and Winding Loss Calculator

This web-based utility allows you to enter frequency, peak-to-peak

(ripple) current, and

Irms current to predict temperature rise and overall

losses, including core loss. Go to online calculator