Document 598-1
SMT Power Inductors
–
MSS1278T
•ꢀDesignedꢀforꢀhighꢀambientꢀtemperatures
•ꢀVeryꢀlowꢀDCR,ꢀexcellentꢀcurrentꢀhandling
•ꢀMagneticꢀshieldingꢀforꢀhighꢀdensityꢀmounting
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 /
85ꢀ 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)
Inductance2
(µH)
typ4 10% 20% 30% 20°C 40°C
MSS1278T-105KLD
Termination:L = RoHS compliant matte tin over
nickel over phos bronze.
Part number1
typ
6.3
8.8
max (MHz) drop drop drop rise rise
MSS1278T-102NL_
MSS1278T-142NL_
MSS1278T-222NL_
MSS1278T-272NL_
MSS1278T-392NL_
1.0 30ꢀ
1.4 30ꢀ
2.2 30ꢀ
7.0 115
9.8 85
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
Special order:
T = RoHS tin-silver-copper
(95.5/4/0.5) or S = non-RoHS
tin-lead (63/37).
9.4 10.5 60
2.7 30ꢀ 10.1 11.3 40
3.9 30ꢀ 11.7 13.0 35
MSS1278T-472ML_
MSS1278T-562ML_
MSS1278T-682ML_
MSS1278T-822ML_
4.7 20ꢀ 13.9 15.5 33
5.6 20ꢀ 15.7 17.5 30
6.8 20ꢀ 19.1 21.3 23
8.2 20ꢀ 20.3 22.6 20
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
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.
MSS1278T-103ML_ 10 20ꢀ
21.8 24.3 17
To have a leader and trailer
added ($25 charge), use code
letter D instead.
MSS1278T-123ML_ 12 20ꢀ
MSS1278T-153ML_ 15 20ꢀ
MSS1278T-183ML_ 18 20ꢀ
MSS1278T-223ML_ 22 20ꢀ
MSS1278T-273ML_ 27 20ꢀ
MSS1278T-333ML_ 33 20ꢀ
MSS1278T-393ML_ 39 20ꢀ
MSS1278T-473ML_ 47 20ꢀ
MSS1278T-563ML_ 56 20ꢀ
MSS1278T-683ML_ 68 20ꢀ
23.2 25.8 15
27.9 31.0 13
30.8 34.3 12
35.5 39.5 11
45.0 50.0 10
2.ꢀ Inductanceꢀtestedꢀatꢀ100ꢀkHz,ꢀ0.1ꢀVrms,ꢀ0ꢀAdcꢀusingꢀ
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 net-
work analyzer and a Coilcraft SMD-D test fixture.
5. DC current at which the inductance drops the
specified amount from its value without current.
61.9 68.8
69.1 76.8
72.3 80.4
80.2 89.2
91.3 101.5
9.5 5.96 6.56 6.98 2.3 3.1
8.5 5.38 5.94 6.28 2.1 3.0
7.5 4.76 5.40 5.66 2.0 2.9
7.0 4.40 4.98 5.30 1.9 2.7
6.5 3.92 4.46 4.74 1.8 2.6
MSS1278T-823ML_ 82 20ꢀ 125.9 139.9
MSS1278T-104ML_ 100 20ꢀ 135.1 150.2
MSS1278T-124KL_ 120 10ꢀ 182.3 202.6
MSS1278T-154KL_ 150 10ꢀ 216.5 240.6
MSS1278T-184KL_ 180 10ꢀ 229.0 254.5
5.0 3.66 4.08 4.38 1.6 2.3
4.5 3.12 3.56 3.78 1.5 2.2
4.3 3.02 3.36 3.58 1.4 1.9
4.1 2.60 2.94 3.10 1.3 1.8
4.0 2.36 2.68 2.84 1.2 1.7
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.
MSS1278T-224KL_ 220 10ꢀ 323.6 359.6
MSS1278T-274KL_ 270 10ꢀ 415.6 461.8
MSS1278T-334KL_ 330 10ꢀ 487.3 541.5
MSS1278T-394KL_ 390 10ꢀ 533.6 592.9
MSS1278T-474KL_ 470 10ꢀ 707.5 786.2
3.4 2.24 2.50 2.62 1.0 1.6
3.1 1.94 2.18 2.34 0.90 1.2
2.9 1.72 1.92 2.06 0.80 1.0
2.7 1.62 1.82 1.92 0.75 1.0
2.2 1.44 1.64 1.74 0.66 0.90
MSS1278T-564KL_ 560 10ꢀ 777.4 863.8
MSS1278T-684KL_ 680 10ꢀ 1045 1162
MSS1278T-824KL_ 820 10ꢀ 1166 1296
MSS1278T-105KL_ 1000 10ꢀ 1334 1482
2.0 1.40 1.54 1.66 0.60 0.80
1.7 1.24 1.32 1.46 0.55 0.75
1.4 1.14 1.28 1.42 0.50 0.70
1.3 0.982 1.08 1.18 0.48 0.68
Document 598-1 Revised 08/18/11
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