Coilcraft, Inc. 2009
Specifications subject to change without notice.
Please check our website for latest information.
HIGH TEMPERA
TURE
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
(H)
typ
max
(MHz) drop
drop
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.