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.
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°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.
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
Frequency (MHz)
10
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
Document 322-2 Revised 08/18/11