COILCRAFT MSS1278

Document 322-1
SMT Power Inductors – MSS1278
• 12.3 × 12.3 mm footprint; 8 mm high shielded inductors
• Low DCR and excellent current handling
Designer’s Kit C380 contains 3 each of all values.
Core material Ferrite
Core and winding loss See www.coilcraft.com/coreloss
Terminations RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight: 3.8 – 4.6 g
Ambient temperature –40°C to +85°C with Irms current, +85°C to
+125°C with derated current
Storage temperature Component: –40°C to +125°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.
Part number1
DCR Inductance2 (mOhms)
(µH)
typ max
3
Isat (A)5 Irms (A)6
SRF
typ4 10% 20% 30% 20°C40°C
(MHz) dropdrop drop rise rise
MSS1278-142ML_ 1.4 ±20%
MSS1278-472ML_ 4.7 ±20%
MSS1278-562ML_ 5.6 ±20%
MSS1278-682ML_ 6.8 ±20%
MSS1278-822ML_ 8.2 ±20%
8.8
13.9
15.7
19.1
20.3
9.8
15.5
17.5
21.3
22.6
80.0
30.0
24.0
21.0
20.0
MSS1278-103ML_ 10 ±20%
MSS1278-123ML_ 12 ±20%
MSS1278-153ML_ 15 ±20%
MSS1278-183ML_ 18 ±20%
MSS1278-223ML_ 22 ±20%
21.8
23.2
27.9
30.8
35.5
24.3
25.8
31.0
34.3
39.5
17.0
15.0
13.0
12.0
11.0
MSS1278-273ML_ 27 ±20%
MSS1278-333ML_ 33 ±20%
MSS1278-393ML_ 39 ±20%
MSS1278-473ML_ 47 ±20%
MSS1278-563ML_ 56 ±20%
45.0
61.9
69.1
72.3
80.2
50.0 10.0
68.8
9.5
76.8
8.5
80.4
7.5
89.2
7.0
25.2
13.7
12.2
11.3
10.1
28.6
15.2
13.7
12.7
11.5
30.6
15.9
14.6
13.7
12.3
7.0010.00
4.30 6.20
4.30 6.20
4.20 6.00
4.10 5.90
9.3610.6 11.2
8.8410.0 10.7
7.30 8.36 9.00
6.10 7.10 7.74
6.04 6.78 7.24
4.00
3.70
3.50
3.00
2.90
5.70
5.20
4.90
4.50
4.00
5.80
5.22
4.68
4.40
4.02
2.60
2.30
2.10
2.00
1.90
3.60
3.10
3.00
2.90
2.70
6.56
5.90
5.42
5.02
4.60
7.02
6.30
5.80
5.32
4.90
MSS1278-683ML_ 68 ±20%
MSS1278-823ML_ 82 ±20%
MSS1278-104ML_ 100 ±20%
MSS1278-124KL_ 120 ±10%
MSS1278-154KL_ 150 ±10%
91.3 101.5
125.9 139.9
135.1150.2
182.3202.6
216.5240.6
6.5
5.0
4.5
4.3
4.1
3.40 3.86 4.26 1.80 2.60
3.12 3.58 3.80 1.60 2.30
2.883.283.521.502.20
2.623.003.241.401.90
2.482.863.021.301.80
MSS1278-184KL_ 180 ±10%
MSS1278-224KL_ 220 ±10%
MSS1278-274KL_ 270 ±10%
MSS1278-334KL_ 330 ±10%
MSS1278-394KL_ 390 ±10%
229.0254.5
323.6359.6
415.6461.8
487.3541.5
533.6592.9
4.0
3.4
3.1
2.9
2.7
2.262.582.741.201.70
1.962.222.361.001.60
1.742.042.180.901.20
1.661.862.000.801.00
1.521.721.880.751.00
MSS1278-474KL_ 470 ±10% 707.5786.2
MSS1278-564KL_ 560 ±10% 777.4863.8
MSS1278-684KL_ 680 ±10% 1045 1162
MSS1278-824KL_ 820 ±10% 1166 1296
MSS1278-105KL_1000 ±10%1334 1483
2.2
2.0
1.7
1.4
1.3
1.341.541.640.660.90
1.241.421.500.600.80
1.161.281.380.550.75
1.041.161.260.500.70
0.971.101.140.480.68
1. Please specify termination and packaging codes:
MSS1278-105KLD
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. EIA481 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 4191A or
equivalent.
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.
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
Document 322-1 Revised 04/04/13
© 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 322-2
SMT Power Inductors – MSS1278
Typical L vs Current
Typical L vs Frequency
10000
10000
1000 µH
100 µH
100
10 µH
10
1
1000 µH
1000
Inductance (µH)
Inductance (µH)
1000
10 µH
10
4.7 µH
0.1
100 µH
100
10
1
100
Current (A)
4.7 µH
1
0.01
10
Frequency (MHz)
0.472 ±0.012
12,0 ±0,3
Typical Current Derating
120
110
123
X
0.472 ±0.012
12,0 ±0,3
100
Dash number
Internal code
Parts manufactured prior
to Sept. 2007 were marked
with only the dash number.
90
80
70
60
0.307 ±0.010
7,8 ±0,25
50
40
30
20
10
0
Isat
Irms
-40
-20
0
0.197 ±0.008
5,0 ±0,2
25°C
Percent of rated current
1
0.1
20
40
60
80
100
120 140
0.025
0,635
0.217
5,5
0.157
4,0
0.138 ±0.008
3,5 ±0,2
0.197 ±0.008
5,0 ±0,2
Ambient temperature (°C)
Dimensions are in
Recommended
Land Pattern
0.334
8,5
inches
mm
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
Document 322-2 Revised 04/04/13
© 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.