Document 322-1
SMT Power Inductors
–
MSS1278
• 12.3 × 12.3 mm footprint; 8 mm high shielded inductors
• Low DCR and excellent current handling
Designer’s Kit C380 contains 3 each of all values.
Core material Ferrite
Core and winding loss See www.coilcraft.com/coreloss
Terminations RoHS compliant matte tin over nickel over phos
bronze. Other terminations available at additional cost.
Weight: 3.8 – 4.6 g
Ambient temperature –40°C to +85°C with Irms current, +85°C to
+125°C with derated current
Storage temperature Component: –40°C to +125°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
DCR3
Isat (A)5
Irms (A)6
1. Please specify termination and packaging codes:
SRF
(mOhms)
typ
Inductance2
(µH)
typ4 10% 20% 30% 20°C 40°C
(MHz) drop drop drop rise rise
Partnumber1
max
MSS1278-105KLD
Termination: L =RoHS compliant matte tin over
nickel over phos bronze.
MSS1278-142ML_
MSS1278-472ML_
MSS1278-562ML_
MSS1278-682ML_
MSS1278-822ML_
1.4±20%
4.7±20%
5.6±20%
6.8±20%
8.2±20%
8.8
13.9
15.7
19.1
20.3
9.8
80.0 25.2 28.6 30.6
30.0 13.7 15.2 15.9
24.0 12.2 13.7 14.6
21.0 11.3 12.7 13.7
20.0 10.1 11.5 12.3
7.00 10.00
4.30 6.20
4.30 6.20
4.20 6.00
4.10 5.90
15.5
17.5
21.3
22.6
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).
MSS1278-103ML_
MSS1278-123ML_
MSS1278-153ML_
MSS1278-183ML_
MSS1278-223ML_
10±20%
12±20%
15±20%
18±20%
22±20%
21.8
23.2
27.9
30.8
35.5
24.3
25.8
31.0
34.3
39.5
17.0
15.0
13.0
12.0
11.0
9.36 10.6 11.2
8.84 10.0 10.7
7.30 8.36 9.00 3.50 4.90
6.10 7.10 7.74 3.00 4.50
6.04 6.78 7.24 2.90 4.00
4.00 5.70
3.70 5.20
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.
MSS1278-273ML_
MSS1278-333ML_
MSS1278-393ML_
MSS1278-473ML_
MSS1278-563ML_
27±20%
33±20%
39±20%
47±20%
56±20%
45.0
61.9
69.1
72.3
80.2
50.0
68.8
76.8
80.4
89.2
10.0
9.5
8.5
7.5
7.0
5.80 6.56 7.02 2.60 3.60
5.22 5.90 6.30 2.30 3.10
4.68 5.42 5.80 2.10 3.00
4.40 5.02 5.32 2.00 2.90
4.02 4.60 4.90 1.90 2.70
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 4191A or
equivalent.
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 Compo-
nents” before soldering.
MSS1278-683ML_
MSS1278-823ML_
MSS1278-104ML_ 100±20%
MSS1278-124KL_ 120±10%
MSS1278-154KL_ 150±10%
68±20%
82±20%
91.3 101.5
125.9 139.9
135.1 150.2
182.3 202.6
216.5 240.6
6.5
5.0
4.5
4.3
4.1
3.40 3.86 4.26 1.80 2.60
3.12 3.58 3.80 1.60 2.30
2.88 3.28 3.52 1.50 2.20
2.62 3.00 3.24 1.40 1.90
2.48 2.86 3.02 1.30 1.80
MSS1278-184KL_ 180±10%
MSS1278-224KL_ 220±10%
MSS1278-274KL_ 270±10%
MSS1278-334KL_ 330±10%
MSS1278-394KL_ 390±10%
229.0 254.5
323.6 359.6
415.6 461.8
487.3 541.5
533.6 592.9
4.0
3.4
3.1
2.9
2.7
2.26 2.58 2.74 1.20 1.70
1.96 2.22 2.36 1.00 1.60
1.74 2.04 2.18 0.90 1.20
1.66 1.86 2.00 0.80 1.00
1.52 1.72 1.88 0.75 1.00
MSS1278-474KL_ 470±10%
MSS1278-564KL_ 560±10%
MSS1278-684KL_ 680±10% 1045 1162
MSS1278-824KL_ 820±10% 1166 1296
MSS1278-105KL_ 1000±10% 1334 1483
707.5 786.2
777.4 863.8
2.2
2.0
1.7
1.4
1.3
1.34 1.54 1.64 0.66 0.90
1.24 1.42 1.50 0.60 0.80
1.16 1.28 1.38 0.55 0.75
1.04 1.16 1.26 0.50 0.70
0.97 1.10 1.14 0.48 0.68
Specifications subject to change without notice.
Please check our website for latest information.
Document322-1 Revised12/01/08
© Coilcraft, Inc. 2009
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