ERATURE
HIGH TEMP
Document 598-1
SMT Power Inductors – MSS1278T
• Designed for high ambient temperatures
• Very low DCR, excellent current handling
• Magnetic shielding allows high density mounting.
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: –55°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)
Mean Time Between Failures (MTBF)
26,315,789 hours
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
DCR
3
SRF
(mOhms)
Inductance
2
typ
4
Part number
1
(µH)
typ
max
(MHz)
MSS1278T-102NL_
1.0 ±30%
6.3
7.0 115
MSS1278T-142NL_
1.4 ±30%
8.8
9.8
85
MSS1278T-222NL_
2.2 ±30%
9.4
10.5
60
MSS1278T-272NL_
2.7 ±30% 10.1
11.3
40
MSS1278T-392NL_
3.9 ±30% 11.7
13.0
35
MSS1278T-472ML_
4.7 ±20% 13.9
15.5
33
MSS1278T-562ML_
5.6 ±20% 15.7
17.5
30
MSS1278T-682ML_
6.8 ±20% 19.1
21.3
23
MSS1278T-822ML_
8.2 ±20% 20.3
22.6
20
MSS1278T-103ML_ 10 ±20%
21.8
24.3
17
MSS1278T-123ML_ 12 ±20%
23.2
25.8
15
MSS1278T-153ML_ 15 ±20%
27.9
31.0
13
MSS1278T-183ML_ 18 ±20%
30.8
34.3
12
MSS1278T-223ML_ 22 ±20%
35.5
39.5
11
MSS1278T-273ML_ 27 ±20%
45.0
50.0
10
MSS1278T-333ML_ 33 ±20%
61.9
68.8
9.5
MSS1278T-393ML_ 39 ±20%
69.1
76.8
8.5
MSS1278T-473ML_ 47 ±20%
72.3
80.4
7.5
MSS1278T-563ML_ 56 ±20%
80.2
89.2
7.0
MSS1278T-683ML_ 68 ±20%
91.3 101.5
6.5
MSS1278T-823ML_ 82 ±20%
125.9 139.9
5.0
MSS1278T-104ML_ 100 ±20%
135.1 150.2
4.5
MSS1278T-124KL_ 120 ±10%
182.3 202.6
4.3
MSS1278T-154KL_ 150 ±10%
216.5 240.6
4.1
MSS1278T-184KL_ 180 ±10%
229.0 254.5
4.0
MSS1278T-224KL_ 220 ±10%
323.6 359.6
3.4
MSS1278T-274KL_ 270 ±10%
415.6 461.8
3.1
MSS1278T-334KL_ 330 ±10%
487.3 541.5
2.9
MSS1278T-394KL_ 390 ±10%
533.6 592.9
2.7
MSS1278T-474KL_ 470 ±10%
707.5 786.2
2.2
MSS1278T-564KL_ 560 ±10%
777.4 863.8
2.0
MSS1278T-684KL_ 680 ±10% 1045 1162
1.7
MSS1278T-824KL_ 820 ±10% 1166 1296
1.4
MSS1278T-105KL_ 1000 ±10% 1334 1482
1.3
Isat
(A)
5
Irms
(A)
6
10% 20% 30% 20°C 40°C
drop drop drop rise rise
31.84 35.04 36.84 7.1 10.1
25.04 27.76 29.52 6.8 9.8
22.56 24.80 25.96 6.3 9.2
18.76 20.72 22.04 6.1 8.6
16.52 18.24 19.20 5.7 7.7
15.30 16.90 17.76 4.3 6.2
13.38 14.86 15.74 4.3 6.2
12.10 13.56 14.20 4.2 6.0
11.38 12.60 13.28 4.1 5.9
10.62 11.82 12.48 4.0 5.7
8.90 9.88 10.44 3.7 5.2
8.36 9.32 9.94 3.5 4.9
8.00 8.88 9.36 3.0 4.5
7.08 7.88 8.34 2.9 4.0
6.32 7.08 7.54 2.6 3.6
5.96 6.56 6.98 2.3 3.1
5.38 5.94 6.28 2.1 3.0
4.76 5.40 5.66 2.0 2.9
4.40 4.98 5.30 1.9 2.7
3.92 4.46 4.74 1.8 2.6
3.66 4.08 4.38 1.6 2.3
3.12 3.56 3.78 1.5 2.2
3.02 3.36 3.58 1.4 1.9
2.60 2.94 3.10 1.3 1.8
2.36 2.68 2.84 1.2 1.7
2.24 2.50 2.62 1.0 1.6
1.94 2.18 2.34 0.90 1.2
1.72 1.92 2.06 0.80 1.0
1.62 1.82 1.92 0.75 1.0
1.44 1.64 1.74 0.66 0.90
1.40 1.54 1.66 0.60 0.80
1.24 1.32 1.46 0.55 0.75
1.14 1.28 1.42 0.50 0.70
0.982 1.08 1.18 0.48 0.68
1. Please specify
termination
and
packaging
codes:
MSS1278T-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. 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.
See Qualification Standards section for environmental
and test data.
Refer to Doc 362 “Soldering Surface Mount
Components” before soldering.
Specifications subject to change without notice.
Please check our website for latest information.
Document 598-1
Revised 02/07/08
© Coilcraft, Inc. 2007
ERATURE
HIGH TEMP
SMT Power Inductors – MSS1278T Series
Typical L vs Frequency
10000
1000 µH
1000
Document 598-2
Typical L vs Current
10000
1000 µH
1000
Inductance (µH)
100
100 µH
Inductance (µH)
100
100 µH
10
10 µH
10
10 µH
1
1 µH
1
1 µH
0.1
0.01
0.1
1
10
0.1
0.1
1
10
100
Frequency (MHz)
Current (A)
Current Derating
120
110
100
90
80
70
60
50
40
30
20
10
0
-40 -20
25°C
0.472 ±0.012
12,0 ±0,3
Percent of rated Current
0.472 ±0.012
12,0 ±0,3
123
X
Dash number
Internal code
0.315 ±0.020
8,00 ±0,5
Isat
Irms
0
20
40
60
80
100
120
140
160 180
Recommended
Land Pattern
0.197 ±0.008
5,0 ±0,2
0.217
5,5
0.157
4,0
0.197 ±0.016
5,0 ±0,4
0.177
4,5
Ambient temperature (°C)
0.138 ±0.016
3,5 ±0,4
Specifications subject to change without notice.
Please check our website for latest information.
Document 598-2
Revised 02/07/08
© Coilcraft, Inc. 2007
