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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.

HIGH TEMPERA

TURE

Document 598-1

Document 598-1 Revised 04/04/13

SMT Power Inductors–MSS1278T

SRF

(mOhms)

30% 20°C 40°C

(µH)

typ

max

(MHz) drop drop drop rise rise

MSS1278T-102NL_

1.0 ±30%

6.3

7.0 115

31.84 35.04 36.84

7.1 10.1

MSS1278T-142NL_

1.4 ±30%

8.8

9.8

85

25.04 27.76 29.52

6.8

9.8

MSS1278T-222NL_

2.2 ±30%

9.4

10.5

60

22.56 24.80 25.96

6.3

9.2

MSS1278T-272NL_

2.7 ±30% 10.1

11.3

40

18.76 20.72 22.04

6.1

8.6

MSS1278T-392NL_

3.9 ±30% 11.7

13.0

35

16.52 18.24 19.20

5.7

7.7

MSS1278T-472ML_

4.7 ±20% 13.9

15.5

33

15.30 16.90 17.76

4.3

6.2

MSS1278T-562ML_

5.6 ±20% 15.7

17.5

30

13.38 14.86 15.74

4.3

6.2

MSS1278T-682ML_

6.8 ±20% 19.1

21.3

23

12.10 13.56 14.20

4.2

6.0

MSS1278T-822ML_

8.2 ±20% 20.3

22.6

20

11.38 12.60 13.28

4.1

5.9

MSS1278T-103ML_ 10 ±20%

21.8

24.3

17

10.62 11.82 12.48

4.0

5.7

MSS1278T-123ML_ 12 ±20%

23.2

25.8

15

8.90

9.88 10.44

3.7

5.2

MSS1278T-153ML_ 15 ±20%

27.9

31.0

13

8.36

9.32

9.94

3.5

4.9

MSS1278T-183ML_ 18 ±20%

30.8

34.3

12

8.00

8.88

9.36

3.0

4.5

MSS1278T-223ML_ 22 ±20%

35.5

39.5

11

7.08

7.88

8.34

2.9

4.0

MSS1278T-273ML_ 27 ±20%

45.0

50.0

10

6.32

7.08

7.54

2.6

3.6

MSS1278T-333ML_ 33 ±20%

61.9

68.8

9.5

5.96

6.56

6.98

2.3

3.1

MSS1278T-393ML_ 39 ±20%

69.1

76.8

8.5

5.38

5.94

6.28

2.1

3.0

MSS1278T-473ML_ 47 ±20%

72.3

80.4

7.5

4.76

5.40

5.66

2.0

2.9

MSS1278T-563ML_ 56 ±20%

80.2

89.2

7.0

4.40

4.98

5.30

1.9

2.7

MSS1278T-683ML_ 68 ±20%

91.3 101.5

6.5

3.92

4.46

4.74

1.8

2.6

MSS1278T-823ML_ 82 ±20%

125.9 139.9

5.0

3.66

4.08

4.38

1.6

2.3

MSS1278T-104ML_ 100 ±20%

135.1 150.2

4.5

3.12

3.56

3.78

1.5

2.2

MSS1278T-124KL_ 120 ±10%

182.3 202.6

4.3

3.02

3.36

3.58

1.4

1.9

MSS1278T-154KL_ 150 ±10%

216.5 240.6

4.1

2.60

2.94

3.10

1.3

1.8

MSS1278T-184KL_ 180 ±10%

229.0 254.5

4.0

2.36

2.68

2.84

1.2

1.7

MSS1278T-224KL_ 220 ±10%

323.6 359.6

3.4

2.24

2.50

2.62

1.0

1.6

MSS1278T-274KL_ 270 ±10%

415.6 461.8

3.1

1.94

2.18

2.34

0.90 1.2

MSS1278T-334KL_ 330 ±10%

487.3 541.5

2.9

1.72

1.92

2.06

0.80 1.0

MSS1278T-394KL_ 390 ±10%

533.6 592.9

2.7

1.62

1.82

1.92

0.75 1.0

MSS1278T-474KL_ 470 ±10%

707.5 786.2

2.2

1.44

1.64

1.74

0.66 0.90

MSS1278T-564KL_ 560 ±10%

777.4 863.8

2.0

1.40

1.54

1.66

0.60 0.80

MSS1278T-684KL_ 680 ±10% 1045 1162

1.7

1.24

1.32

1.46

0.55 0.75

MSS1278T-824KL_ 820 ±10% 1166 1296

1.4

1.14

1.28

1.42

0.50 0.70

MSS1278T-105KL_ 1000 ±10% 1334 1482

1.3

0.982 1.08

1.18

0.48 0.68

Designer’s Kit C419 contains 3 of each value

Core material Ferrite

Terminations RoHS compliant matte tin over nickel over phos

bronze. Other terminations available at additional cost.

Weight: 3.8 g – 4.6 g

Ambient temperature –40°C to +125°C with

Irms current, +125°C to

+165°C with derated current

Storage temperature Component: –40°C to +165°C.

Tape and reel packaging: –40°C to +80°C

Resistance to soldering heat Max three 40 second reflows at

+260°C, parts cooled to room temperature between cycles

Moisture Sensitivity Level (MSL) 1 (unlimited floor life at <30°C /

85% relative humidity)

Failures in Time (FIT) / Mean Time Between Failures (MTBF)

38 per billion hours / 26,315,789 hours, calculated per Telcordia SR-332

Packaging 500/13

″ reel; Plastic tape: 24 mm wide, 0.5 mm thick,

16 mm pocket spacing, 8.7 mm pocket depth

PCB washing Tested with pure water or alcohol only. For other

solvents, see Doc787_PCB_Washing.pdf.

• Designed for high ambient temperatures

• Very low DCR, excellent current handling

• Magnetic shielding for high density mounting

1. Please specify

termination and packaging codes:

MSS1278T-105KLD

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: D= 13

″ machine-ready reel. EIA-481

embossed plastic tape (500 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 D instead.

2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc using

an Agilent/HP 4263B LCR meter or equivalent.

3. DCR measured on a micro-ohmmeter and a

Coilcraft CCF858 test fixture.

4. SRF measured using an Agilent/HP 8753D network

analyzer and a Coilcraft SMD-D test fixture.

5. DC current at which the inductance drops the

specified amount from its value without current.

6. Current that causes the specified temperature rise

from 25°C ambient.

7. Electrical specifications at 25°C.

Refer to Doc 362 “Soldering Surface Mount

Components” before soldering.