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Document 322-1
SMT Power Inductors
–
MSS1278
• 12.3 × 12.3 mm footprint; 8 mm high shielded inductors
• Low DCR and excellent current handling
AEC
+
Q200 85°C
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 (40°C rise) Irms current.
Maximum part temperature +125°C (ambient + temp rise). Derating.
Storage temperature Component: –40°C to +125°C.
Tape and reel 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)
Packaging 500/13″ reel; Plastic tape: 24 mm wide, 0.5 mm thick,
16 mm pocket spacing, 8.7 mm pocket depth
PCB washing Tested to MIL-STD-202 Method 215 plus an additional
aqueous wash. See Doc787_PCB_Washing.pdf.
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
MSS1278-105KLD
Termination:L =RoHS compliant matte tin over
nickel over phos bronze.
Part number1
max
MSS1278-142ML_
MSS1278-472ML_
MSS1278-562ML_
MSS1278-682ML_
MSS1278-822ML_
1.4 20ꢀ
4.7 20ꢀ
5.6 20ꢀ
6.8 20ꢀ
8.2 20ꢀ
8.8
9.8 80.0 25.2 28.6 30.6
15.5 30.0 13.7 15.2 15.9
17.5 24.0 12.2 13.7 14.6
21.3 21.0 11.3 12.7 13.7
22.6 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
13.9
15.7
19.1
20.3
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-
MSS1278-103ML_ 10 20ꢀ
MSS1278-123ML_ 12 20ꢀ
MSS1278-153ML_ 15 20ꢀ
MSS1278-183ML_ 18 20ꢀ
MSS1278-223ML_ 22 20ꢀ
21.8
23.2
27.9
30.8
35.5
24.3 17.0
25.8 15.0
31.0 13.0
34.3 12.0
39.5 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
481 embossed plastic tape
(500 parts per full reel). Quanti-
ties less than full reel available:
in tape (not machine ready)
or with leader and trailer ($25
charge).
B=Less than full reel. In an effort
to simplify our part numbering
system, Coilcraft is eliminating
the need for multiple packaging
codes. When ordering, simply
change the last letter of your
part number from B to D.
MSS1278-273ML_ 27 20ꢀ
MSS1278-333ML_ 33 20ꢀ
MSS1278-393ML_ 39 20ꢀ
MSS1278-473ML_ 47 20ꢀ
MSS1278-563ML_ 56 20ꢀ
45.0
61.9
69.1
72.3
80.2
50.0 10.0
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
68.8
76.8
80.4
89.2
9.5
8.5
7.5
7.0
MSS1278-683ML_ 68 20ꢀ
MSS1278-823ML_ 82 20ꢀ
MSS1278-104ML_ 100 20ꢀ
MSS1278-124KL_ 120 10ꢀ
MSS1278-154KL_ 150 10ꢀ
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
2. Inductance tested at 100 kHz, 0.1 Vrms, 0 Adc us-
ing 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 25°C that causes the specified
inductance drop from its value without current.
Click for temperature derating information.
6. Current that causes the specified temperature
rise from 25°C ambient.This information is for
reference only and does not represent absolute
maximum ratings.
Click for temperature derating information.
7. Electrical specifications at 25°C.
MSS1278-184KL_ 180 10ꢀ
MSS1278-224KL_ 220 10ꢀ
MSS1278-274KL_ 270 10ꢀ
MSS1278-334KL_ 330 10ꢀ
MSS1278-394KL_ 390 10ꢀ
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 10ꢀ
MSS1278-564KL_ 560 10ꢀ
MSS1278-684KL_ 680 10ꢀ 1045 1162
MSS1278-824KL_ 820 10ꢀ 1166 1296
MSS1278-105KL_ 1000 10ꢀ 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
Refer to Doc 362 “Soldering Surface Mount
Components” before soldering.
Document 322-1 Revised 01/28/22
US +1-847-639-6400 sales@coilcraft.com
UK +44-1236-730595 sales@coilcraft-europe.com
Taiwan +886-2-2264 3646 sales@coilcraft.com.tw
China +86-21-6218 8074 sales@coilcraft.com.cn
Singapore + 65-6484 8412 sales@coilcraft.com.sg
© Coilcraft Inc. 2022
This product may not be used in medical or high
risk applications without prior Coilcraft approval.
Specification subject to change without notice.
Please check web site for latest information.
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