Document 322-1
SMT Power Inductors - MSS1278 Series
The MSS1278 Series provides high inductance and high
efficiency in a rugged, low cost part.
The magnetic shielding and small footprint of these
inductors allows high density mounting. The flat top
ensures reliable pick and place handling.
They’re ideal for use in DC-DC converters, LCD panels,
and portable devices where low cost and high reliabilty
are critical.
In addition to the standard values shown, Coilcraft can
custom-engineer versions to meet specific applications.
Coilcraft
Designer’s Kit C180
contains samples of all
values shown. To order, contact Coilcraft or purchase
on-line at
http://order.coilcraft.com.
Part number
1
L
2
(µH)
Irms
5
DCR SRF
3
20°C 40°C
max typ
Isat
4
rise rise
(Ohms) (MHz) (A) (A) (A)
0.011
0.020
0.023
0.024
0.028
0.030
0.032
0.038
0.043
0.050
0.060
0.080
0.085
0.10
0.11
0.12
0.15
0.18
0.23
0.27
0.30
0.40
0.53
0.60
0.68
0.88
0.96
1.30
1.50
1.70
80.0 11.50 7.00 10.00
30.0 7.00 4.30 6.20
24.0 6.80 4.30 6.20
21.0 6.40 4.20 6.00
20.0 5.80 4.10 5.90
17.0 5.40 4.00 5.70
15.0 4.90 3.70 5.20
13.0 4.50 3.50 4.90
12.0 4.00 3.00 4.50
11.0 3.60 2.90 4.00
10.0 3.30 2.60 3.60
9.5 3.00 2.30 3.10
8.5 2.70 2.10 3.00
7.5 2.50 2.00 2.90
7.0 2.30 1.90 2.70
6.5 2.10 1.80 2.60
5.0 1.90 1.60 2.30
4.5 1.70 1.50 2.20
4.3 1.55 1.40 1.90
4.1 1.40 1.30 1.80
4.0 1.30 1.20 1.70
3.4 1.15 1.00 1.60
3.1 1.00 0.90 1.20
2.9 0.90 0.80 1.00
2.7 0.85 0.75 1.00
2.2 0.78 0.66 0.90
2.0 0.72 0.60 0.80
1.7 0.65 0.55 0.75
1.4 0.60 0.50 0.70
1.3 0.55 0.48 0.68
1. When ordering, please specify
packaging
code:
MSS1278-105KXD
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 on Agilent/HP 4284A
LC meter or equivalent.
3. SRF measured using Agilent/HP 4191A or equivalent.
4. DC current at which the inductance drops 10% (typ) from its value
without current.
5. Average current for temperature rise from 25°C ambient.
6. Operating temperature range
−40°C
to +85°C.
7. Electrical specifications at 25°C.
See Qualification Standards section for environmental and test data.
MSS1278-142MX_
MSS1278-472MX_
MSS1278-562MX_
MSS1278-682MX_
MSS1278-822MX_
MSS1278-103MX_
MSS1278-123MX_
MSS1278-153MX_
MSS1278-183MX_
MSS1278-223MX_
MSS1278-273MX_
MSS1278-333MX_
MSS1278-393MX_
MSS1278-473MX_
MSS1278-563MX_
MSS1278-683MX_
MSS1278-823MX_
MSS1278-104MX_
MSS1278-124KX_
MSS1278-154KX_
MSS1278-184KX_
MSS1278-224KX_
MSS1278-274KX_
MSS1278-334KX_
MSS1278-394KX_
MSS1278-474KX_
MSS1278-564KX_
MSS1278-684KX_
MSS1278-824KX_
MSS1278-105KX_
1.4 ±20%
4.7 ±20%
5.6 ±20%
6.8 ±20%
8.2 ±20%
10 ±20%
12 ±20%
15 ±20%
18 ±20%
22 ±20%
27 ±20%
33 ±20%
39 ±20%
47 ±20%
56 ±20%
68 ±20%
82 ±20%
100 ±20%
120 ±10%
150 ±10%
180 ±10%
220 ±10%
270 ±10%
330 ±10%
390 ±10%
470 ±10%
560 ±10%
680 ±10%
820 ±10%
1000 ±10%
Specifications subject to change without notice.
Please check our website for latest information. Document 322-1
Revised 12/28/04
Document 322-2
SMT Power Inductors - MSS1278 Series
Typical L vs Frequency
10000
Typical L vs Current
10000
1000 µH
1000
1000 µH
1000
Inductance (µH)
100 µH
100
Inductance (µH)
100 µH
100
10 µH
10
4.7 µH
10 µH
10
4.7 µH
1
0.01
0.1
1
10
1
0.1
1
10
100
Frequency (MHz)
Current (A)
0.484
max
12,3
0.317
max
8,05
0.484
max
12,3
XXX
Recommended
Land Pattern
0.197
5,0
0.217
5,5
0.157
4,0
0.197
5,0
0.177
4,5
0.138
3,5
Weight:
3.8 – 4.6 g
Terminations:
Nickel/tin over phos bronze
Tape and reel:
500/13″ reel 24 mm tape width
For packaging data see Tape and Reel Specifications section.
Specifications subject to change without notice.
Please check our website for latest information. Document 322-2
Revised 12/28/04
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