Document 322-1
SMT Power Inductors - MSS1278 Series
TheMSS1278Seriesprovideshighinductanceandhigh
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-lineathttp://order.coilcraft.com.
Irms5
DCR SRF3
20°C 40°C
L2
(µH)
max typ Isat4 rise rise
Part number1
(Ohms) (MHz) (A) (A) (A)
MSS1278-142MX_
MSS1278-472MX_
MSS1278-562MX_
MSS1278-682MX_
MSS1278-822MX_
MSS1278-103MX_ 10 20ꢀ 0.030 17.0 5.40 4.00 5.70
MSS1278-123MX_ 12 20ꢀ 0.032 15.0 4.90 3.70 5.20
MSS1278-153MX_ 15 20ꢀ 0.038 13.0 4.50 3.50 4.90
MSS1278-183MX_ 18 20ꢀ 0.043 12.0 4.00 3.00 4.50
MSS1278-223MX_ 22 20ꢀ 0.050 11.0 3.60 2.90 4.00
1.4 20ꢀ 0.011 80.0 11.50 7.00 10.00
4.7 20ꢀ 0.020 30.0 7.00 4.30 6.20
5.6 20ꢀ 0.023 24.0 6.80 4.30 6.20
6.8 20ꢀ 0.024 21.0 6.40 4.20 6.00
8.2 20ꢀ 0.028 20.0 5.80 4.10 5.90
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 10ꢀ (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.
MSS1278-273MX_ 27 20ꢀ 0.060 10.0 3.30 2.60 3.60
MSS1278-333MX_ 33 20ꢀ 0.080
MSS1278-393MX_ 39 20ꢀ 0.085
MSS1278-473MX_ 47 20ꢀ 0.10
MSS1278-563MX_ 56 20ꢀ 0.11
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
See Qualification Standards section for environmental and test data.
MSS1278-683MX_ 68 20ꢀ 0.12
MSS1278-823MX_ 82 20ꢀ 0.15
MSS1278-104MX_ 100 20ꢀ 0.18
MSS1278-124KX_ 120 10ꢀ 0.23
MSS1278-154KX_ 150 10ꢀ 0.27
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
MSS1278-184KX_ 180 10ꢀ 0.30
MSS1278-224KX_ 220 10ꢀ 0.40
MSS1278-274KX_ 270 10ꢀ 0.53
MSS1278-334KX_ 330 10ꢀ 0.60
MSS1278-394KX_ 390 10ꢀ 0.68
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
MSS1278-474KX_ 470 10ꢀ 0.88
MSS1278-564KX_ 560 10ꢀ 0.96
MSS1278-684KX_ 680 10ꢀ 1.30
MSS1278-824KX_ 820 10ꢀ 1.50
MSS1278-105KX_ 1000 10ꢀ 1.70
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
Specifications subject to change without notice.
Please check our website for latest information. Document 322-1 Revised 12/28/04