© Coilcraft, Inc. 2009
Specifications subject to change without notice.
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HIGH TEMPERA
TURE
Document 598-1
Document 598-1
Revised 10/20/08
SMT Power Inductors–MSS1278T
DCR3
SRF
Isat (A)5
Irms (A)6
Inductance2
(mOhms)
typ4
10%
20%
30%
20°C 40°C
Part number1
(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.
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
• 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-105K
LD
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.
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