Coilcraft MSS1278-472ML Smt power inductor Datasheet

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.
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, 0.4 mm thick,
16 mm pocket spacing, 8.1 mm pocket depth
PCB washing Only pure water or alcohol recommended
Part number1
DCR Inductance2 (mOhms)
(µH)
typ
max
3
Isat (A)5 Irms (A)6
SRF
typ4 10% 20% 30% 20°C 40°C
(MHz) drop drop 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
68.8
76.8
80.4
89.2
MSS1278-683ML_ 68 ±20%
MSS1278-823ML_ 82 ±20%
MSS1278-104ML_ 100 ±20%
MSS1278-124KL_ 120 ±10%
MSS1278-154KL_ 150 ±10%
91.3
125.9
135.1
182.3
216.5
MSS1278-184KL_ 180 ±10%
MSS1278-224KL_ 220 ±10%
MSS1278-274KL_ 270 ±10%
MSS1278-334KL_ 330 ±10%
MSS1278-394KL_ 390 ±10%
229.0
323.6
415.6
487.3
533.6
MSS1278-474KL_ 470 ±10%
MSS1278-564KL_ 560 ±10%
MSS1278-684KL_ 680 ±10%
MSS1278-824KL_ 820 ±10%
MSS1278-105KL_ 1000 ±10%
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
7.00
4.30
4.30
4.20
4.10
10.00
6.20
6.20
6.00
5.90
9.36 10.6 11.2
8.84 10.0 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
10.0
9.5
8.5
7.5
7.0
5.80
5.22
4.68
4.40
4.02
6.56
5.90
5.42
5.02
4.60
7.02
6.30
5.80
5.32
4.90
2.60
2.30
2.10
2.00
1.90
3.60
3.10
3.00
2.90
2.70
101.5
139.9
150.2
202.6
240.6
6.5
5.0
4.5
4.3
4.1
3.40
3.12
2.88
2.62
2.48
3.86
3.58
3.28
3.00
2.86
4.26
3.80
3.52
3.24
3.02
1.80
1.60
1.50
1.40
1.30
2.60
2.30
2.20
1.90
1.80
254.5
359.6
461.8
541.5
592.9
4.0
3.4
3.1
2.9
2.7
2.26
1.96
1.74
1.66
1.52
2.58
2.22
2.04
1.86
1.72
2.74
2.36
2.18
2.00
1.88
1.20
1.00
0.90
0.80
0.75
1.70
1.60
1.20
1.00
1.00
707.5 786.2
777.4 863.8
1045 1162
1166 1296
1334 1483
2.2
2.0
1.7
1.4
1.3
1.34
1.24
1.16
1.04
0.97
1.54
1.42
1.28
1.16
1.10
1.64
1.50
1.38
1.26
1.14
0.66
0.60
0.55
0.50
0.48
0.90
0.80
0.75
0.70
0.68
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.
Document 322-1
Revised 08/18/11
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
0.1
1
10
Document 322-2
Revised 08/18/11
Frequency (MHz)
Typical Current Derating
100
90
80
70
60
50
40
30
20
10
0
25°C
Percent of rated current
120
110
Isat
Irms
-40
-20
0
20
40
60
80
100
120 140
Ambient temperature (°C)
Dimensions are in
inches
mm
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